diff --git a/.changeset/whatsapp-signer.md b/.changeset/whatsapp-signer.md
new file mode 100644
index 000000000..b5424838e
--- /dev/null
+++ b/.changeset/whatsapp-signer.md
@@ -0,0 +1,5 @@
+---
+"@crossmint/wallets-sdk": minor
+---
+
+Add support for WhatsApp non-custodial signers
diff --git a/packages/client/react-base/src/hooks/useSignerAuth.ts b/packages/client/react-base/src/hooks/useSignerAuth.ts
index c1aaca1d5..258c0ebd9 100644
--- a/packages/client/react-base/src/hooks/useSignerAuth.ts
+++ b/packages/client/react-base/src/hooks/useSignerAuth.ts
@@ -5,7 +5,7 @@ const throwNotAvailable = (functionName: string) => () => {
     throw new Error(`${functionName} is not available. Make sure you're using an email or phone signer wallet.`);
 };
 
-export type SignerType = "email" | "phone";
+export type SignerType = "email" | "phone" | "whatsapp";
 export type DialogStep = "initial" | "otp";
 
 export interface SignerAuthState {
@@ -128,7 +128,7 @@ export function useSignerAuth(): SignerAuthState & SignerAuthHandlers {
 
     const onAuthRequired: Callbacks["onAuthRequired"] = useCallback(
         (
-            signerType: "email" | "phone",
+            signerType: "email" | "phone" | "whatsapp",
             signerLocator: string,
             needsAuth: boolean,
             sendMessageWithOtp: () => Promise<void>,
@@ -136,7 +136,7 @@ export function useSignerAuth(): SignerAuthState & SignerAuthHandlers {
             reject: () => void
         ) => {
             const signerValue = signerLocator.split(":")[1];
-            if (signerType === "phone" && signerValue != null) {
+            if ((signerType === "phone" || signerType === "whatsapp") && signerValue != null) {
                 setPhoneSignerDialogOpen(needsAuth);
                 setActiveAuthPhone(needsAuth ? signerValue : undefined);
                 sendPhoneOtpRef.current = sendMessageWithOtp;
diff --git a/packages/client/react-base/src/providers/CrossmintWalletBaseProvider.tsx b/packages/client/react-base/src/providers/CrossmintWalletBaseProvider.tsx
index 21d935538..68ba4257f 100644
--- a/packages/client/react-base/src/providers/CrossmintWalletBaseProvider.tsx
+++ b/packages/client/react-base/src/providers/CrossmintWalletBaseProvider.tsx
@@ -234,7 +234,7 @@ export function CrossmintWalletBaseProvider({
 
     const wrappedOnAuthRequired = useCallback(
         async (
-            signerType: "email" | "phone",
+            signerType: "email" | "phone" | "whatsapp",
             signerLocator: string,
             needsAuth: boolean,
             sendOtp: () => Promise<void>,
@@ -255,7 +255,7 @@ export function CrossmintWalletBaseProvider({
 
     const initializeWebViewIfNeeded = useCallback(
         async (signer: SignerConfigForChain<Chain>) => {
-            if (signer.type === "email" || signer.type === "phone") {
+            if (signer.type === "email" || signer.type === "phone" || signer.type === "whatsapp") {
                 await initializeWebView?.();
             }
         },
diff --git a/packages/wallets/src/index.ts b/packages/wallets/src/index.ts
index e0739cfe3..3db8dcd0a 100644
--- a/packages/wallets/src/index.ts
+++ b/packages/wallets/src/index.ts
@@ -59,6 +59,7 @@ export type {
     SignerAdapter,
     EmailSignerConfig,
     PhoneSignerConfig,
+    WhatsappSignerConfig,
     ExternalWalletSignerConfig,
     ExternalWalletRegistrationConfig,
     EvmExternalWalletSignerConfig,
@@ -68,6 +69,7 @@ export type {
     SignerLocator,
     EmailSignerLocator,
     PhoneSignerLocator,
+    WhatsappSignerLocator,
     PasskeySignerLocator,
     DeviceSignerLocator,
     DeviceSignerConfig,
diff --git a/packages/wallets/src/openapi.json b/packages/wallets/src/openapi.json
index 4c7032232..2d355a1cd 100644
--- a/packages/wallets/src/openapi.json
+++ b/packages/wallets/src/openapi.json
@@ -7693,7 +7693,7 @@
                                                     "type": {
                                                         "type": "string",
                                                         "description": "Identifier for phone signer type",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string",
@@ -7960,7 +7960,7 @@
                                                     "type": {
                                                         "type": "string",
                                                         "description": "Identifier for phone signer type",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string",
@@ -8224,7 +8224,7 @@
                                                     "type": {
                                                         "type": "string",
                                                         "description": "Identifier for phone signer type",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string",
@@ -8953,7 +8953,7 @@
                                                     "type": {
                                                         "type": "string",
                                                         "description": "Identifier for phone signer type",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string",
@@ -9106,7 +9106,7 @@
                                                                         "type": {
                                                                             "type": "string",
                                                                             "description": "Identifier for phone signer type",
-                                                                            "enum": ["phone"]
+                                                                            "enum": ["phone", "whatsapp"]
                                                                         },
                                                                         "phone": {
                                                                             "type": "string",
@@ -9322,7 +9322,7 @@
                                                     "type": {
                                                         "type": "string",
                                                         "description": "Identifier for phone signer type",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string",
@@ -9475,7 +9475,7 @@
                                                                         "type": {
                                                                             "type": "string",
                                                                             "description": "Identifier for phone signer type",
-                                                                            "enum": ["phone"]
+                                                                            "enum": ["phone", "whatsapp"]
                                                                         },
                                                                         "phone": {
                                                                             "type": "string",
@@ -9773,7 +9773,7 @@
                                                     "type": {
                                                         "type": "string",
                                                         "description": "Identifier for phone signer type",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string",
@@ -9942,7 +9942,7 @@
                                                                         "type": {
                                                                             "type": "string",
                                                                             "description": "Identifier for phone signer type",
-                                                                            "enum": ["phone"]
+                                                                            "enum": ["phone", "whatsapp"]
                                                                         },
                                                                         "phone": {
                                                                             "type": "string",
@@ -10286,7 +10286,7 @@
                                             "type": {
                                                 "type": "string",
                                                 "description": "Identifier for phone signer type",
-                                                "enum": ["phone"]
+                                                "enum": ["phone", "whatsapp"]
                                             },
                                             "phone": {
                                                 "type": "string",
@@ -10590,7 +10590,7 @@
                                                                             "properties": {
                                                                                 "type": {
                                                                                     "type": "string",
-                                                                                    "enum": ["phone"]
+                                                                                    "enum": ["phone", "whatsapp"]
                                                                                 },
                                                                                 "phone": {
                                                                                     "type": "string"
@@ -10772,7 +10772,7 @@
                                                                             "properties": {
                                                                                 "type": {
                                                                                     "type": "string",
-                                                                                    "enum": ["phone"]
+                                                                                    "enum": ["phone", "whatsapp"]
                                                                                 },
                                                                                 "phone": {
                                                                                     "type": "string"
@@ -11237,7 +11237,7 @@
                                             "type": {
                                                 "type": "string",
                                                 "description": "Identifier for phone signer type",
-                                                "enum": ["phone"]
+                                                "enum": ["phone", "whatsapp"]
                                             },
                                             "phone": {
                                                 "type": "string",
@@ -11494,7 +11494,10 @@
                                                                                         "properties": {
                                                                                             "type": {
                                                                                                 "type": "string",
-                                                                                                "enum": ["phone"]
+                                                                                                "enum": [
+                                                                                                    "phone",
+                                                                                                    "whatsapp"
+                                                                                                ]
                                                                                             },
                                                                                             "phone": {
                                                                                                 "type": "string"
@@ -11702,7 +11705,10 @@
                                                                                         "properties": {
                                                                                             "type": {
                                                                                                 "type": "string",
-                                                                                                "enum": ["phone"]
+                                                                                                "enum": [
+                                                                                                    "phone",
+                                                                                                    "whatsapp"
+                                                                                                ]
                                                                                             },
                                                                                             "phone": {
                                                                                                 "type": "string"
@@ -12026,7 +12032,7 @@
                                             "type": {
                                                 "type": "string",
                                                 "description": "Identifier for phone signer type",
-                                                "enum": ["phone"]
+                                                "enum": ["phone", "whatsapp"]
                                             },
                                             "phone": {
                                                 "type": "string",
@@ -12351,7 +12357,7 @@
                                                                             "properties": {
                                                                                 "type": {
                                                                                     "type": "string",
-                                                                                    "enum": ["phone"]
+                                                                                    "enum": ["phone", "whatsapp"]
                                                                                 },
                                                                                 "phone": {
                                                                                     "type": "string"
@@ -12533,7 +12539,7 @@
                                                                             "properties": {
                                                                                 "type": {
                                                                                     "type": "string",
-                                                                                    "enum": ["phone"]
+                                                                                    "enum": ["phone", "whatsapp"]
                                                                                 },
                                                                                 "phone": {
                                                                                     "type": "string"
@@ -15350,7 +15356,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -15731,7 +15737,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -15895,7 +15901,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -16058,7 +16064,7 @@
                                                                 "properties": {
                                                                     "type": {
                                                                         "type": "string",
-                                                                        "enum": ["phone"]
+                                                                        "enum": ["phone", "whatsapp"]
                                                                     },
                                                                     "phone": {
                                                                         "type": "string"
@@ -16236,7 +16242,7 @@
                                                                 "properties": {
                                                                     "type": {
                                                                         "type": "string",
-                                                                        "enum": ["phone"]
+                                                                        "enum": ["phone", "whatsapp"]
                                                                     },
                                                                     "phone": {
                                                                         "type": "string"
@@ -16553,7 +16559,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -16836,7 +16842,7 @@
                                                                         "properties": {
                                                                             "type": {
                                                                                 "type": "string",
-                                                                                "enum": ["phone"]
+                                                                                "enum": ["phone", "whatsapp"]
                                                                             },
                                                                             "phone": {
                                                                                 "type": "string"
@@ -17014,7 +17020,7 @@
                                                                         "properties": {
                                                                             "type": {
                                                                                 "type": "string",
-                                                                                "enum": ["phone"]
+                                                                                "enum": ["phone", "whatsapp"]
                                                                             },
                                                                             "phone": {
                                                                                 "type": "string"
@@ -17603,7 +17609,7 @@
                                                                         "properties": {
                                                                             "type": {
                                                                                 "type": "string",
-                                                                                "enum": ["phone"]
+                                                                                "enum": ["phone", "whatsapp"]
                                                                             },
                                                                             "phone": {
                                                                                 "type": "string"
@@ -17781,7 +17787,7 @@
                                                                         "properties": {
                                                                             "type": {
                                                                                 "type": "string",
-                                                                                "enum": ["phone"]
+                                                                                "enum": ["phone", "whatsapp"]
                                                                             },
                                                                             "phone": {
                                                                                 "type": "string"
@@ -18201,7 +18207,7 @@
                                                                 "properties": {
                                                                     "type": {
                                                                         "type": "string",
-                                                                        "enum": ["phone"]
+                                                                        "enum": ["phone", "whatsapp"]
                                                                     },
                                                                     "phone": {
                                                                         "type": "string"
@@ -18351,7 +18357,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -18574,7 +18580,7 @@
                                                                         "properties": {
                                                                             "type": {
                                                                                 "type": "string",
-                                                                                "enum": ["phone"]
+                                                                                "enum": ["phone", "whatsapp"]
                                                                             },
                                                                             "phone": {
                                                                                 "type": "string"
@@ -18752,7 +18758,7 @@
                                                                         "properties": {
                                                                             "type": {
                                                                                 "type": "string",
-                                                                                "enum": ["phone"]
+                                                                                "enum": ["phone", "whatsapp"]
                                                                             },
                                                                             "phone": {
                                                                                 "type": "string"
@@ -19172,7 +19178,7 @@
                                                                 "properties": {
                                                                     "type": {
                                                                         "type": "string",
-                                                                        "enum": ["phone"]
+                                                                        "enum": ["phone", "whatsapp"]
                                                                     },
                                                                     "phone": {
                                                                         "type": "string"
@@ -19360,7 +19366,7 @@
                                                                         "properties": {
                                                                             "type": {
                                                                                 "type": "string",
-                                                                                "enum": ["phone"]
+                                                                                "enum": ["phone", "whatsapp"]
                                                                             },
                                                                             "phone": {
                                                                                 "type": "string"
@@ -19538,7 +19544,7 @@
                                                                         "properties": {
                                                                             "type": {
                                                                                 "type": "string",
-                                                                                "enum": ["phone"]
+                                                                                "enum": ["phone", "whatsapp"]
                                                                             },
                                                                             "phone": {
                                                                                 "type": "string"
@@ -20140,7 +20146,7 @@
                                                                         "properties": {
                                                                             "type": {
                                                                                 "type": "string",
-                                                                                "enum": ["phone"]
+                                                                                "enum": ["phone", "whatsapp"]
                                                                             },
                                                                             "phone": {
                                                                                 "type": "string"
@@ -20318,7 +20324,7 @@
                                                                         "properties": {
                                                                             "type": {
                                                                                 "type": "string",
-                                                                                "enum": ["phone"]
+                                                                                "enum": ["phone", "whatsapp"]
                                                                             },
                                                                             "phone": {
                                                                                 "type": "string"
@@ -20760,7 +20766,7 @@
                                                 "properties": {
                                                     "type": {
                                                         "type": "string",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string"
@@ -21136,7 +21142,7 @@
                                                 "properties": {
                                                     "type": {
                                                         "type": "string",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string"
@@ -21300,7 +21306,7 @@
                                                 "properties": {
                                                     "type": {
                                                         "type": "string",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string"
@@ -21463,7 +21469,7 @@
                                                     "properties": {
                                                         "type": {
                                                             "type": "string",
-                                                            "enum": ["phone"]
+                                                            "enum": ["phone", "whatsapp"]
                                                         },
                                                         "phone": {
                                                             "type": "string"
@@ -21641,7 +21647,7 @@
                                                     "properties": {
                                                         "type": {
                                                             "type": "string",
-                                                            "enum": ["phone"]
+                                                            "enum": ["phone", "whatsapp"]
                                                         },
                                                         "phone": {
                                                             "type": "string"
@@ -21947,7 +21953,7 @@
                                                 "properties": {
                                                     "type": {
                                                         "type": "string",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string"
@@ -22230,7 +22236,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -22408,7 +22414,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -22989,7 +22995,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -23167,7 +23173,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -23579,7 +23585,7 @@
                                                     "properties": {
                                                         "type": {
                                                             "type": "string",
-                                                            "enum": ["phone"]
+                                                            "enum": ["phone", "whatsapp"]
                                                         },
                                                         "phone": {
                                                             "type": "string"
@@ -23729,7 +23735,7 @@
                                                 "properties": {
                                                     "type": {
                                                         "type": "string",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string"
@@ -23952,7 +23958,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -24130,7 +24136,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -24542,7 +24548,7 @@
                                                     "properties": {
                                                         "type": {
                                                             "type": "string",
-                                                            "enum": ["phone"]
+                                                            "enum": ["phone", "whatsapp"]
                                                         },
                                                         "phone": {
                                                             "type": "string"
@@ -24730,7 +24736,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -24908,7 +24914,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -25502,7 +25508,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -25680,7 +25686,7 @@
                                                             "properties": {
                                                                 "type": {
                                                                     "type": "string",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string"
@@ -29257,7 +29263,7 @@
                                                     "type": {
                                                         "type": "string",
                                                         "description": "Identifier for phone signer type",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string",
@@ -29467,7 +29473,7 @@
                                                         "type": {
                                                             "type": "string",
                                                             "description": "Identifier for phone signer type",
-                                                            "enum": ["phone"]
+                                                            "enum": ["phone", "whatsapp"]
                                                         },
                                                         "phone": {
                                                             "type": "string",
@@ -29701,7 +29707,7 @@
                                                     "type": {
                                                         "type": "string",
                                                         "description": "Identifier for phone signer type",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string",
@@ -29913,7 +29919,7 @@
                                                                 "type": {
                                                                     "type": "string",
                                                                     "description": "Identifier for phone signer type",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string",
@@ -30252,7 +30258,8 @@
                                                                                                     "type": {
                                                                                                         "type": "string",
                                                                                                         "enum": [
-                                                                                                            "phone"
+                                                                                                            "phone",
+                                                                                                            "whatsapp"
                                                                                                         ]
                                                                                                     },
                                                                                                     "phone": {
@@ -30475,7 +30482,8 @@
                                                                                                     "type": {
                                                                                                         "type": "string",
                                                                                                         "enum": [
-                                                                                                            "phone"
+                                                                                                            "phone",
+                                                                                                            "whatsapp"
                                                                                                         ]
                                                                                                     },
                                                                                                     "phone": {
@@ -31031,7 +31039,7 @@
                                                     "type": {
                                                         "type": "string",
                                                         "description": "Identifier for phone signer type",
-                                                        "enum": ["phone"]
+                                                        "enum": ["phone", "whatsapp"]
                                                     },
                                                     "phone": {
                                                         "type": "string",
@@ -31276,7 +31284,7 @@
                                                                 "type": {
                                                                     "type": "string",
                                                                     "description": "Identifier for phone signer type",
-                                                                    "enum": ["phone"]
+                                                                    "enum": ["phone", "whatsapp"]
                                                                 },
                                                                 "phone": {
                                                                     "type": "string",
@@ -31636,7 +31644,8 @@
                                                                                                     "type": {
                                                                                                         "type": "string",
                                                                                                         "enum": [
-                                                                                                            "phone"
+                                                                                                            "phone",
+                                                                                                            "whatsapp"
                                                                                                         ]
                                                                                                     },
                                                                                                     "phone": {
@@ -31859,7 +31868,8 @@
                                                                                                     "type": {
                                                                                                         "type": "string",
                                                                                                         "enum": [
-                                                                                                            "phone"
+                                                                                                            "phone",
+                                                                                                            "whatsapp"
                                                                                                         ]
                                                                                                     },
                                                                                                     "phone": {
diff --git a/packages/wallets/src/signers/descriptors/descriptors.test.ts b/packages/wallets/src/signers/descriptors/descriptors.test.ts
index c4148e7de..82ecc535e 100644
--- a/packages/wallets/src/signers/descriptors/descriptors.test.ts
+++ b/packages/wallets/src/signers/descriptors/descriptors.test.ts
@@ -44,6 +44,7 @@ function makeCtx(
 it.each<[name: string, type: string, config: Config, message: string]>([
     ["email missing email", "email", cfg({ type: "email" }), "Email signer requires an email address"],
     ["phone missing phone", "phone", cfg({ type: "phone" }), "Phone signer requires a phone number"],
+    ["whatsapp missing phone", "whatsapp", cfg({ type: "whatsapp" }), "Whatsapp signer requires a phone number"],
     [
         "ext missing address",
         "external-wallet",
@@ -63,6 +64,7 @@ it.each<[name: string, type: string, config: Config, message: string]>([
 it.each<[type: string, config: Config]>([
     ["email", cfg({ type: "email", email: "a@b.com" })],
     ["phone", cfg({ type: "phone", phone: "+15551234" })],
+    ["whatsapp", cfg({ type: "whatsapp", phone: "+15551234" })],
     ["external-wallet", cfg({ type: "external-wallet", address: "0xabc", onSign: vi.fn() })],
     ["api-key", cfg({ type: "api-key" })],
     ["passkey", cfg({ type: "passkey" })],
@@ -72,9 +74,10 @@ it.each<[type: string, config: Config]>([
     expect(() => getSignerDescriptor(type as never).validateConfig(config as never)).not.toThrow();
 });
 
-it.each<[type: "email" | "phone", field: "email" | "phone", value: string]>([
+it.each<[type: "email" | "phone" | "whatsapp", field: "email" | "phone", value: string]>([
     ["email", "email", "a@b.com"],
     ["phone", "phone", "+15551234"],
+    ["whatsapp", "phone", "+15551234"],
 ])("buildInternalConfig: %s threads crossmint/clientTEEConnection/onAuthRequired from ctx", (type, field, value) => {
     const result = getSignerDescriptor(type).buildInternalConfig({ type, [field]: value } as never, makeCtx());
     expect(result).toEqual({
@@ -139,7 +142,7 @@ it.each<[name: string, config: Config, expected: object]>([
     expect(getSignerDescriptor("passkey").buildInternalConfig(config as never, makeCtx())).toMatchObject(expected);
 });
 
-it.each<[type: string]>([["email"], ["phone"], ["passkey"], ["api-key"]])(
+it.each<[type: string]>([["email"], ["phone"], ["whatsapp"], ["passkey"], ["api-key"]])(
     "canAutoAssemble: %s is always true",
     (type) => {
         expect(getSignerDescriptor(type as never).canAutoAssemble({ type } as never, makeCtx())).toBe(true);
@@ -192,6 +195,7 @@ it("addSignerPayload: device without publicKey returns locator", () => {
 it.each<[type: string, config: Config, expected: string]>([
     ["email", cfg({ type: "email", email: "a@b.com" }), "email:a@b.com"],
     ["phone", cfg({ type: "phone", phone: "+15551234" }), "phone:+15551234"],
+    ["whatsapp", cfg({ type: "whatsapp", phone: "+15551234" }), "whatsapp:+15551234"],
     ["api-key", cfg({ type: "api-key" }), "api-key"],
     ["external-wallet", cfg({ type: "external-wallet", address: "0xabc", onSign: vi.fn() }), "external-wallet:0xabc"],
 ])("addSignerPayload: %s returns locator", (type, config, expected) => {
@@ -279,6 +283,7 @@ it.each<[name: string, type: string, config: Config, recovery: Config, expected:
 it.each([
     ["email", true],
     ["phone", true],
+    ["whatsapp", true],
     ["api-key", true],
     ["device", true],
     ["external-wallet", true],
@@ -295,7 +300,7 @@ it.each([
     expect(getSignerDescriptor(type).signerUnavailableReason()).toMatch(pattern);
 });
 
-it.each(["email", "phone", "api-key", "device", "passkey"] as const)(
+it.each(["email", "phone", "whatsapp", "api-key", "device", "passkey"] as const)(
     "signerUnavailableReason: %s returns null so require() applies the generic fallback",
     (type) => {
         expect(getSignerDescriptor(type).signerUnavailableReason()).toBeNull();
diff --git a/packages/wallets/src/signers/descriptors/index.ts b/packages/wallets/src/signers/descriptors/index.ts
index 926bef16c..69495ecb9 100644
--- a/packages/wallets/src/signers/descriptors/index.ts
+++ b/packages/wallets/src/signers/descriptors/index.ts
@@ -7,6 +7,7 @@ import { externalWalletSignerDescriptor } from "./external-wallet";
 import { passkeySignerDescriptor } from "./passkey";
 import { phoneSignerDescriptor } from "./phone";
 import { serverSignerDescriptor } from "./server";
+import { whatsappSignerDescriptor } from "./whatsapp";
 import type { SignerDescriptor } from "./types";
 
 export type { SignerDescriptor, SignerDescriptorContext } from "./types";
@@ -17,6 +18,8 @@ export function getSignerDescriptor<C extends Chain>(type: SignerDescriptor["typ
             return emailSignerDescriptor as SignerDescriptor<C>;
         case "phone":
             return phoneSignerDescriptor as SignerDescriptor<C>;
+        case "whatsapp":
+            return whatsappSignerDescriptor as SignerDescriptor<C>;
         case "passkey":
             return passkeySignerDescriptor as SignerDescriptor<C>;
         case "device":
diff --git a/packages/wallets/src/signers/descriptors/types.ts b/packages/wallets/src/signers/descriptors/types.ts
index 1872cfac1..c67ea7c80 100644
--- a/packages/wallets/src/signers/descriptors/types.ts
+++ b/packages/wallets/src/signers/descriptors/types.ts
@@ -25,7 +25,7 @@ export interface SignerDescriptorContext<C extends Chain> {
 }
 
 export interface SignerDescriptor<C extends Chain = Chain> {
-    readonly type: "email" | "phone" | "passkey" | "device" | "api-key" | "server" | "external-wallet";
+    readonly type: "email" | "phone" | "whatsapp" | "passkey" | "device" | "api-key" | "server" | "external-wallet";
     validateConfig(config: SignerConfigForChain<C>): void;
     buildInternalConfig(
         config: SignerConfigForChain<C> | ApiSourcedServerSignerConfig,
diff --git a/packages/wallets/src/signers/descriptors/whatsapp.ts b/packages/wallets/src/signers/descriptors/whatsapp.ts
new file mode 100644
index 000000000..a7ffc80c8
--- /dev/null
+++ b/packages/wallets/src/signers/descriptors/whatsapp.ts
@@ -0,0 +1,47 @@
+import type { RegisterSignerParams } from "../../api";
+import type { Chain } from "../../chains/chains";
+import { getSignerLocator } from "../../utils/signer-locator";
+import type {
+    InternalSignerConfig,
+    SignerConfigForChain,
+    RecoverySignerConfigForChain,
+    SignerLocator,
+    WhatsappSignerConfig,
+} from "../types";
+import type { SignerDescriptor, SignerDescriptorContext } from "./types";
+
+export const whatsappSignerDescriptor: SignerDescriptor = {
+    type: "whatsapp",
+    validateConfig(config: SignerConfigForChain<Chain>): void {
+        if (!("phone" in config) || config.phone == null) {
+            throw new Error("Whatsapp signer requires a phone number");
+        }
+    },
+    buildInternalConfig(
+        config: SignerConfigForChain<Chain>,
+        ctx: SignerDescriptorContext<Chain>
+    ): InternalSignerConfig<Chain> {
+        const whatsappConfig = config as WhatsappSignerConfig;
+        return {
+            type: "whatsapp",
+            phone: whatsappConfig.phone,
+            locator: `whatsapp:${whatsappConfig.phone}` as SignerLocator,
+            address: ctx.walletAddress,
+            crossmint: ctx.crossmint,
+            clientTEEConnection: ctx.clientTEEConnection,
+            resetSignerFrame: ctx.resetSignerFrame,
+            onAuthRequired: ctx.onAuthRequired,
+        } as InternalSignerConfig<Chain>;
+    },
+    canAutoAssemble(): boolean {
+        return true;
+    },
+    addSignerPayload(config: SignerConfigForChain<Chain>): RegisterSignerParams["signer"] {
+        return getSignerLocator(config);
+    },
+    matchesRecovery(config: SignerConfigForChain<Chain>, recovery: RecoverySignerConfigForChain<Chain>): boolean {
+        return getSignerLocator(config) === getSignerLocator(recovery as SignerConfigForChain<Chain>);
+    },
+    adoptsRecoveryConfigOnMatch: true,
+    signerUnavailableReason: () => null,
+};
diff --git a/packages/wallets/src/signers/index.ts b/packages/wallets/src/signers/index.ts
index d92b9091e..3f68a2b67 100644
--- a/packages/wallets/src/signers/index.ts
+++ b/packages/wallets/src/signers/index.ts
@@ -20,6 +20,7 @@ export function assembleSigner<C extends Chain>(
     switch (config.type) {
         case "email":
         case "phone":
+        case "whatsapp":
             if (chain === "solana") {
                 return new SolanaNonCustodialSigner(config);
             }
diff --git a/packages/wallets/src/signers/non-custodial/ncs-evm-signer.ts b/packages/wallets/src/signers/non-custodial/ncs-evm-signer.ts
index 2e0945e20..b3a3fabe7 100644
--- a/packages/wallets/src/signers/non-custodial/ncs-evm-signer.ts
+++ b/packages/wallets/src/signers/non-custodial/ncs-evm-signer.ts
@@ -1,11 +1,11 @@
-import type { EmailInternalSignerConfig, PhoneInternalSignerConfig } from "../types";
+import type { EmailInternalSignerConfig, PhoneInternalSignerConfig, WhatsappInternalSignerConfig } from "../types";
 import { NonCustodialSigner, DEFAULT_EVENT_OPTIONS } from "./ncs-signer";
 import { PersonalMessage } from "ox";
 import { isHex, toHex, type Hex } from "viem";
 import { walletsLogger } from "../../logger";
 
 export class EVMNonCustodialSigner extends NonCustodialSigner {
-    constructor(config: EmailInternalSignerConfig | PhoneInternalSignerConfig) {
+    constructor(config: EmailInternalSignerConfig | PhoneInternalSignerConfig | WhatsappInternalSignerConfig) {
         super(config);
     }
 
diff --git a/packages/wallets/src/signers/non-custodial/ncs-signer.ts b/packages/wallets/src/signers/non-custodial/ncs-signer.ts
index d249d22c4..d57a7e261 100644
--- a/packages/wallets/src/signers/non-custodial/ncs-signer.ts
+++ b/packages/wallets/src/signers/non-custodial/ncs-signer.ts
@@ -6,6 +6,8 @@ import type {
     PhoneInternalSignerConfig,
     PhoneSignerLocator,
     SignerAdapter,
+    WhatsappInternalSignerConfig,
+    WhatsappSignerLocator,
 } from "../types";
 import {
     AuthRejectedError,
@@ -20,7 +22,7 @@ import type { SignerOutputEvent } from "@crossmint/client-signers";
 import { walletsLogger } from "../../logger";
 
 export abstract class NonCustodialSigner implements SignerAdapter {
-    public readonly type: "email" | "phone";
+    public readonly type: "email" | "phone" | "whatsapp";
     private _needsAuth = true;
     private _authPromise: {
         promise: Promise<void>;
@@ -30,7 +32,9 @@ export abstract class NonCustodialSigner implements SignerAdapter {
     private _initializationPromise: Promise<void> | null = null;
     private _onboardingConnectionGeneration: number | null = null;
 
-    constructor(protected config: EmailInternalSignerConfig | PhoneInternalSignerConfig) {
+    constructor(
+        protected config: EmailInternalSignerConfig | PhoneInternalSignerConfig | WhatsappInternalSignerConfig
+    ) {
         // Only initialize the signer if running client-side
         if (typeof window !== "undefined") {
             this._initializationPromise = this.initialize();
@@ -38,7 +42,7 @@ export abstract class NonCustodialSigner implements SignerAdapter {
         this.type = this.config.type;
     }
 
-    locator(): EmailSignerLocator | PhoneSignerLocator {
+    locator(): EmailSignerLocator | PhoneSignerLocator | WhatsappSignerLocator {
         return this.config.locator;
     }
 
@@ -288,7 +292,10 @@ export abstract class NonCustodialSigner implements SignerAdapter {
         if (this.config.type === "email") {
             return `email:${this.config.email}`;
         }
-        return `phone:${this.config.phone}`;
+        if (this.config.type === "phone") {
+            return `phone:${this.config.phone}`;
+        }
+        return `whatsapp:${this.config.phone}`;
     }
 
     private async verifyOtp(encryptedOtp: string) {
diff --git a/packages/wallets/src/signers/non-custodial/ncs-solana-signer.ts b/packages/wallets/src/signers/non-custodial/ncs-solana-signer.ts
index 0f1f27256..95c14f6c0 100644
--- a/packages/wallets/src/signers/non-custodial/ncs-solana-signer.ts
+++ b/packages/wallets/src/signers/non-custodial/ncs-solana-signer.ts
@@ -1,11 +1,11 @@
 import { VersionedTransaction } from "@solana/web3.js";
 import base58 from "bs58";
-import type { EmailInternalSignerConfig, PhoneInternalSignerConfig } from "../types";
+import type { EmailInternalSignerConfig, PhoneInternalSignerConfig, WhatsappInternalSignerConfig } from "../types";
 import { NonCustodialSigner, DEFAULT_EVENT_OPTIONS } from "./ncs-signer";
 import { walletsLogger } from "../../logger";
 
 export class SolanaNonCustodialSigner extends NonCustodialSigner {
-    constructor(config: EmailInternalSignerConfig | PhoneInternalSignerConfig) {
+    constructor(config: EmailInternalSignerConfig | PhoneInternalSignerConfig | WhatsappInternalSignerConfig) {
         super(config);
     }
 
diff --git a/packages/wallets/src/signers/non-custodial/ncs-stellar-signer.ts b/packages/wallets/src/signers/non-custodial/ncs-stellar-signer.ts
index 9b0856576..6e6a8efeb 100644
--- a/packages/wallets/src/signers/non-custodial/ncs-stellar-signer.ts
+++ b/packages/wallets/src/signers/non-custodial/ncs-stellar-signer.ts
@@ -1,9 +1,9 @@
-import type { EmailInternalSignerConfig, PhoneInternalSignerConfig } from "../types";
+import type { EmailInternalSignerConfig, PhoneInternalSignerConfig, WhatsappInternalSignerConfig } from "../types";
 import { DEFAULT_EVENT_OPTIONS, NonCustodialSigner } from "./ncs-signer";
 import { walletsLogger } from "../../logger";
 
 export class StellarNonCustodialSigner extends NonCustodialSigner {
-    constructor(config: EmailInternalSignerConfig | PhoneInternalSignerConfig) {
+    constructor(config: EmailInternalSignerConfig | PhoneInternalSignerConfig | WhatsappInternalSignerConfig) {
         super(config);
     }
 
diff --git a/packages/wallets/src/signers/types.ts b/packages/wallets/src/signers/types.ts
index 479656f35..377a1824c 100644
--- a/packages/wallets/src/signers/types.ts
+++ b/packages/wallets/src/signers/types.ts
@@ -90,7 +90,16 @@ export type PhoneSignerConfig = {
     locator?: string;
 };
 
-export type NonCustodialSignerType = PhoneSignerConfig["type"] | EmailSignerConfig["type"];
+export type WhatsappSignerConfig = {
+    type: "whatsapp";
+    phone?: string;
+    locator?: string;
+};
+
+export type NonCustodialSignerType =
+    | PhoneSignerConfig["type"]
+    | WhatsappSignerConfig["type"]
+    | EmailSignerConfig["type"];
 
 export type ExternalWalletSignerConfigForChain<C extends Chain> = C extends SolanaChain
     ? SolanaExternalWalletSignerConfig
@@ -158,6 +167,12 @@ export type PhoneInternalSignerConfig = PhoneSignerConfig &
         onAuthRequired?: Callbacks["onAuthRequired"];
     };
 
+export type WhatsappInternalSignerConfig = WhatsappSignerConfig &
+    Omit<BaseInternalSignerConfig, "locator"> & {
+        locator: WhatsappSignerLocator;
+        onAuthRequired?: Callbacks["onAuthRequired"];
+    };
+
 export type DeviceInternalSignerConfig = {
     type: "device";
     locator?: DeviceSignerLocator;
@@ -189,6 +204,7 @@ export type ServerInternalSignerConfig = {
 export type InternalSignerConfig<C extends Chain> =
     | EmailInternalSignerConfig
     | PhoneInternalSignerConfig
+    | WhatsappInternalSignerConfig
     | PasskeyInternalSignerConfig
     | ApiKeyInternalSignerConfig
     | ExternalWalletInternalSignerConfig<C>
@@ -225,16 +241,23 @@ export type DeviceSignerConfig = {
 };
 
 export type SignerConfigForChain<C extends Chain> = C extends SolanaChain
-    ? EmailSignerConfig | PhoneSignerConfig | BaseSignerConfig<C> | DeviceSignerConfig
+    ? EmailSignerConfig | PhoneSignerConfig | WhatsappSignerConfig | BaseSignerConfig<C> | DeviceSignerConfig
     : C extends StellarChain
-      ? EmailSignerConfig | PhoneSignerConfig | BaseSignerConfig<C> | DeviceSignerConfig
-      : EmailSignerConfig | PhoneSignerConfig | PasskeySignerConfig | BaseSignerConfig<C> | DeviceSignerConfig;
+      ? EmailSignerConfig | PhoneSignerConfig | WhatsappSignerConfig | BaseSignerConfig<C> | DeviceSignerConfig
+      :
+            | EmailSignerConfig
+            | PhoneSignerConfig
+            | WhatsappSignerConfig
+            | PasskeySignerConfig
+            | BaseSignerConfig<C>
+            | DeviceSignerConfig;
 
 ////////////////////////////////////////////////////////////
 // Signer locator types
 ////////////////////////////////////////////////////////////
 export type EmailSignerLocator = `email:${string}`;
 export type PhoneSignerLocator = `phone:${string}`;
+export type WhatsappSignerLocator = `whatsapp:${string}`;
 export type PasskeySignerLocator = `passkey:${string}`;
 export type DeviceSignerLocator = `device:${string}`;
 export type ExternalWalletSignerLocator = `external-wallet:${string}`;
@@ -244,6 +267,7 @@ export type ServerSignerLocator = `server:${string}`;
 export type SignerLocator =
     | EmailSignerLocator
     | PhoneSignerLocator
+    | WhatsappSignerLocator
     | PasskeySignerLocator
     | DeviceSignerLocator
     | ExternalWalletSignerLocator
@@ -256,6 +280,7 @@ export type SignerLocator =
 type SignResultMap = {
     email: BaseSignResult;
     phone: BaseSignResult;
+    whatsapp: BaseSignResult;
     "api-key": BaseSignResult;
     "external-wallet": BaseSignResult;
     server: BaseSignResult;
diff --git a/packages/wallets/src/utils/signer-locator.test.ts b/packages/wallets/src/utils/signer-locator.test.ts
index 8e49d0351..b7f4a2021 100644
--- a/packages/wallets/src/utils/signer-locator.test.ts
+++ b/packages/wallets/src/utils/signer-locator.test.ts
@@ -56,6 +56,11 @@ describe("getSignerLocator", () => {
         expect(getSignerLocator(signer)).toBe("phone:+1234567890");
     });
 
+    it("returns whatsapp locator", () => {
+        const signer = { type: "whatsapp", phone: "+1234567890" } as SignerConfigForChain<Chain>;
+        expect(getSignerLocator(signer)).toBe("whatsapp:+1234567890");
+    });
+
     it("returns passkey locator", () => {
         const signer = { type: "passkey", id: "cred-123" } as SignerConfigForChain<Chain>;
         expect(getSignerLocator(signer)).toBe("passkey:cred-123");
diff --git a/packages/wallets/src/utils/signer-locator.ts b/packages/wallets/src/utils/signer-locator.ts
index 8fba3a49c..27c16e2a5 100644
--- a/packages/wallets/src/utils/signer-locator.ts
+++ b/packages/wallets/src/utils/signer-locator.ts
@@ -19,6 +19,9 @@ export function getSignerLocator<C extends Chain>(
     if (signer.type === "phone" && signer.phone) {
         return `phone:${signer.phone}`;
     }
+    if (signer.type === "whatsapp" && signer.phone) {
+        return `whatsapp:${signer.phone}`;
+    }
     if (signer.type === "passkey" && "id" in signer) {
         return `passkey:${signer.id}`;
     }
diff --git a/packages/wallets/src/utils/signer-mapping.ts b/packages/wallets/src/utils/signer-mapping.ts
index e4d24ffb3..842191616 100644
--- a/packages/wallets/src/utils/signer-mapping.ts
+++ b/packages/wallets/src/utils/signer-mapping.ts
@@ -42,6 +42,13 @@ export function extractSignerBase(apiSigner: APISigner): SignerBase {
                 address: apiSigner.address,
                 locator: apiSigner.locator,
             };
+        case "whatsapp":
+            return {
+                type: "whatsapp",
+                phone: apiSigner.phone,
+                address: apiSigner.address,
+                locator: apiSigner.locator,
+            };
         case "device":
             return {
                 type: "device",
diff --git a/packages/wallets/src/wallets/types.ts b/packages/wallets/src/wallets/types.ts
index 9bd7d83bd..955bfc975 100644
--- a/packages/wallets/src/wallets/types.ts
+++ b/packages/wallets/src/wallets/types.ts
@@ -176,6 +176,14 @@ export type Signer =
           status: SignerStatus;
           scopes?: Scope[];
       }
+    | {
+          type: "whatsapp";
+          phone: string;
+          address: string;
+          locator: string;
+          status: SignerStatus;
+          scopes?: Scope[];
+      }
     | {
           type: "device";
           publicKey: { x: string; y: string };
@@ -200,7 +208,7 @@ export type Callbacks = {
     onWalletCreationStart?: () => Promise<void>;
     onTransactionStart?: () => Promise<void>;
     onAuthRequired?: (
-        signerType: "email" | "phone",
+        signerType: "email" | "phone" | "whatsapp",
         signerLocator: string,
         needsAuth: boolean,
         sendOtp: () => Promise<void>,
diff --git a/packages/wallets/src/wallets/wallet.test.ts b/packages/wallets/src/wallets/wallet.test.ts
index ca02529df..b056c99ce 100644
--- a/packages/wallets/src/wallets/wallet.test.ts
+++ b/packages/wallets/src/wallets/wallet.test.ts
@@ -1902,6 +1902,26 @@ describe("Wallet - useSigner()", () => {
             expect(mockApiClient.getSigner).not.toHaveBeenCalled();
         });
 
+        it("accepts the recovery signer (whatsapp) without calling getSigner", async () => {
+            mockApiClient = createMockApiClient();
+            const wallet = new Wallet(
+                {
+                    chain: "base-sepolia" as const,
+                    address: "0x1234567890123456789012345678901234567890",
+                    recovery: { type: "whatsapp", phone: "+1234567890" } as any,
+                },
+                mockApiClient as unknown as ApiClient
+            );
+            vi.spyOn(wallet, "signers").mockResolvedValue([]);
+
+            await wallet.useSigner({ type: "whatsapp", phone: "+1234567890" } as any);
+
+            expect(wallet.signer).toBeDefined();
+            expect(wallet.signer?.type).toBe("whatsapp");
+            expect(wallet.signer?.status).toBe("active");
+            expect(mockApiClient.getSigner).not.toHaveBeenCalled();
+        });
+
         it("accepts recovery external-wallet signer without calling getSigner", async () => {
             mockApiClient = createMockApiClient();
             const wallet = new Wallet(