diff --git a/services/identity/src/database/farcaster.rs b/services/identity/src/database/farcaster.rs
--- a/services/identity/src/database/farcaster.rs
+++ b/services/identity/src/database/farcaster.rs
@@ -100,6 +100,26 @@
 
     Ok(())
   }
+
+  pub async fn remove_farcaster_id(
+    &self,
+    user_id: String,
+  ) -> Result<(), Error> {
+    let update_expression =
+      format!("REMOVE {}", USERS_TABLE_FARCASTER_ID_ATTRIBUTE_NAME);
+
+    self
+      .client
+      .update_item()
+      .table_name(USERS_TABLE)
+      .key(USERS_TABLE_PARTITION_KEY, AttributeValue::S(user_id))
+      .update_expression(update_expression)
+      .send()
+      .await
+      .map_err(|e| Error::AwsSdk(e.into()))?;
+
+    Ok(())
+  }
 }
 
 impl TryFrom<AttributeMap> for FarcasterUserData {
diff --git a/services/identity/src/grpc_services/authenticated.rs b/services/identity/src/grpc_services/authenticated.rs
--- a/services/identity/src/grpc_services/authenticated.rs
+++ b/services/identity/src/grpc_services/authenticated.rs
@@ -433,6 +433,22 @@
     let response = Empty {};
     Ok(Response::new(response))
   }
+
+  async fn unlink_farcaster_account(
+    &self,
+    request: tonic::Request<Empty>,
+  ) -> Result<Response<Empty>, tonic::Status> {
+    let (user_id, _) = get_user_and_device_id(&request)?;
+
+    self
+      .db_client
+      .remove_farcaster_id(user_id)
+      .await
+      .map_err(handle_db_error)?;
+
+    let response = Empty {};
+    Ok(Response::new(response))
+  }
 }
 
 // raw device list that can be serialized to JSON (and then signed in the future)
diff --git a/shared/protos/identity_auth.proto b/shared/protos/identity_auth.proto
--- a/shared/protos/identity_auth.proto
+++ b/shared/protos/identity_auth.proto
@@ -63,6 +63,9 @@
   // Called by an existing user to link their Farcaster account
   rpc LinkFarcasterAccount(LinkFarcasterAccountRequest) returns
     (identity.unauth.Empty) {}
+  // Called by an existing user to unlink their Farcaster account
+  rpc UnlinkFarcasterAccount(identity.unauth.Empty) returns
+    (identity.unauth.Empty) {}
 }
 
 // Helper types
diff --git a/web/protobufs/identity-auth-client.cjs b/web/protobufs/identity-auth-client.cjs
--- a/web/protobufs/identity-auth-client.cjs
+++ b/web/protobufs/identity-auth-client.cjs
@@ -810,4 +810,65 @@
 };
 
 
+/**
+ * @const
+ * @type {!grpc.web.MethodDescriptor<
+ *   !proto.identity.unauth.Empty,
+ *   !proto.identity.unauth.Empty>}
+ */
+const methodDescriptor_IdentityClientService_UnlinkFarcasterAccount = new grpc.web.MethodDescriptor(
+  '/identity.auth.IdentityClientService/UnlinkFarcasterAccount',
+  grpc.web.MethodType.UNARY,
+  identity_unauth_pb.Empty,
+  identity_unauth_pb.Empty,
+  /**
+   * @param {!proto.identity.unauth.Empty} request
+   * @return {!Uint8Array}
+   */
+  function(request) {
+    return request.serializeBinary();
+  },
+  identity_unauth_pb.Empty.deserializeBinary
+);
+
+
+/**
+ * @param {!proto.identity.unauth.Empty} request The
+ *     request proto
+ * @param {?Object<string, string>} metadata User defined
+ *     call metadata
+ * @param {function(?grpc.web.RpcError, ?proto.identity.unauth.Empty)}
+ *     callback The callback function(error, response)
+ * @return {!grpc.web.ClientReadableStream<!proto.identity.unauth.Empty>|undefined}
+ *     The XHR Node Readable Stream
+ */
+proto.identity.auth.IdentityClientServiceClient.prototype.unlinkFarcasterAccount =
+    function(request, metadata, callback) {
+  return this.client_.rpcCall(this.hostname_ +
+      '/identity.auth.IdentityClientService/UnlinkFarcasterAccount',
+      request,
+      metadata || {},
+      methodDescriptor_IdentityClientService_UnlinkFarcasterAccount,
+      callback);
+};
+
+
+/**
+ * @param {!proto.identity.unauth.Empty} request The
+ *     request proto
+ * @param {?Object<string, string>=} metadata User defined
+ *     call metadata
+ * @return {!Promise<!proto.identity.unauth.Empty>}
+ *     Promise that resolves to the response
+ */
+proto.identity.auth.IdentityClientServicePromiseClient.prototype.unlinkFarcasterAccount =
+    function(request, metadata) {
+  return this.client_.unaryCall(this.hostname_ +
+      '/identity.auth.IdentityClientService/UnlinkFarcasterAccount',
+      request,
+      metadata || {},
+      methodDescriptor_IdentityClientService_UnlinkFarcasterAccount);
+};
+
+
 module.exports = proto.identity.auth;
diff --git a/web/protobufs/identity-auth-client.cjs.flow b/web/protobufs/identity-auth-client.cjs.flow
--- a/web/protobufs/identity-auth-client.cjs.flow
+++ b/web/protobufs/identity-auth-client.cjs.flow
@@ -94,6 +94,13 @@
     callback: (err: grpcWeb.RpcError,
                response: identityStructs.Empty) => void
   ): grpcWeb.ClientReadableStream<identityStructs.Empty>;
+
+  unlinkFarcasterAccount(
+    request: identityStructs.Empty,
+    metadata: grpcWeb.Metadata | void,
+    callback: (err: grpcWeb.RpcError,
+               response: identityStructs.Empty) => void
+  ): grpcWeb.ClientReadableStream<identityStructs.Empty>;
 }
 
 declare export class IdentityClientServicePromiseClient {
@@ -160,4 +167,9 @@
     request: identityAuthStructs.LinkFarcasterAccountRequest,
     metadata?: grpcWeb.Metadata
   ): Promise<identityStructs.Empty>;
+
+  unlinkFarcasterAccount(
+    request: identityStructs.Empty,
+    metadata?: grpcWeb.Metadata
+  ): Promise<identityStructs.Empty>;
 }