diff --git a/lib/hooks/input-state-container-hooks.js b/lib/hooks/input-state-container-hooks.js
--- a/lib/hooks/input-state-container-hooks.js
+++ b/lib/hooks/input-state-container-hooks.js
@@ -83,6 +83,9 @@
   const processHolders = useProcessBlobHolders();
   const dispatch = useDispatch();
 
+  const sendFarcasterTextMessage = useSendFarcasterTextMessage();
+  const currentUserFID = useCurrentUserFID();
+
   return React.useCallback(
     async (
       messageInfo: RawMultimediaMessageInfo,
@@ -104,6 +107,8 @@
           reassignThickThreadMedia,
           processHolders,
           dispatch,
+          currentUserFID,
+          sendFarcasterTextMessage,
         },
       );
     },
@@ -115,6 +120,8 @@
       sendComposableDMOperation,
       sendMultimediaMessage,
       threadInfos,
+      currentUserFID,
+      sendFarcasterTextMessage,
     ],
   );
 }
diff --git a/lib/shared/threads/protocols/farcaster-thread-protocol.js b/lib/shared/threads/protocols/farcaster-thread-protocol.js
--- a/lib/shared/threads/protocols/farcaster-thread-protocol.js
+++ b/lib/shared/threads/protocols/farcaster-thread-protocol.js
@@ -86,6 +86,8 @@
   RemoveUsersFromThreadUtils,
   ProtocolLeaveThreadInput,
   LeaveThreadUtils,
+  ProtocolSendMultimediaMessageInput,
+  SendMultimediaMessageUtils,
 } from '../thread-spec.js';
 
 const farcasterThreadProtocol: ThreadProtocol<MemberInfoSansPermissions> = {
@@ -134,8 +136,61 @@
     };
   },
 
-  sendMultimediaMessage: async (): Promise<SendMultimediaMessagePayload> => {
-    throw new Error('sendMultimediaMessage method is not yet implemented');
+  sendMultimediaMessage: async (
+    message: ProtocolSendMultimediaMessageInput,
+    utils: SendMultimediaMessageUtils,
+  ): Promise<SendMultimediaMessagePayload> => {
+    const { messageInfo, threadInfo } = message;
+    const { sendFarcasterTextMessage, currentUserFID } = utils;
+    const { localID, media } = messageInfo;
+    invariant(
+      localID !== null && localID !== undefined,
+      'localID should be set',
+    );
+
+    const time = Date.now();
+
+    const messageText = media
+      .map(m => {
+        if (m.type === 'photo' || m.type === 'video') {
+          return m.uri;
+        }
+        return null;
+      })
+      .filter(Boolean)
+      .join('\n');
+
+    let request;
+    if (threadInfo.type === farcasterThreadTypes.FARCASTER_PERSONAL) {
+      const otherUser = getSingleOtherUser(threadInfo, currentUserFID);
+      invariant(
+        otherUser,
+        `Farcaster 1:1 conversation should have one more member except ${
+          currentUserFID ?? 'null'
+        }`,
+      );
+      request = {
+        recipientFid: otherUser,
+        message: messageText,
+      };
+    } else {
+      const conversationID = conversationIDFromFarcasterThreadID(threadInfo.id);
+      request = {
+        groupId: conversationID,
+        message: messageText,
+      };
+    }
+
+    const result = await sendFarcasterTextMessage(request);
+
+    return {
+      result: {
+        localID,
+        serverID: result.result.messageId,
+        threadID: messageInfo.threadID,
+        time,
+      },
+    };
   },
 
   editTextMessage: async (): Promise<void> => {
diff --git a/lib/shared/threads/thread-spec.js b/lib/shared/threads/thread-spec.js
--- a/lib/shared/threads/thread-spec.js
+++ b/lib/shared/threads/thread-spec.js
@@ -140,6 +140,8 @@
   +reassignThickThreadMedia: MediaMetadataReassignmentAction,
   +processHolders: ProcessHolders,
   +dispatch: Dispatch,
+  +sendFarcasterTextMessage: SendFarcasterTextMessageInput => Promise<SendFarcasterMessageResult>,
+  +currentUserFID: ?string,
 };
 
 export type ProtocolEditTextMessageInput = {