LINE Bot MCP Server (SSE Support)

Instructions

Implementation Reference

• src/tools/broadcastTextMessage.ts:26-37 (handler)

  The async handler that executes the broadcast message operation using the MessagingApiClient.

  async ({ message }) => {
    try {
      const response = await this.client.broadcast({
        messages: [message as unknown as messagingApi.Message],
      });
      return createSuccessResponse(response);
    } catch (error) {
      return createErrorResponse(
        `Failed to broadcast message: ${error.message}`,
      );
    }
  },

• src/tools/broadcastTextMessage.ts:18-38 (registration)

  Registration of the broadcast_text_message tool within the MCP server.

  register(server: McpServer) {
    server.tool(
      "broadcast_text_message",
      "Broadcast a simple text message via LINE to all users who have followed your LINE Official Account. Use this for sending " +
        "plain text messages without formatting. Please be aware that this message will be sent to all users.",
      {
        message: textMessageSchema,
      },
      async ({ message }) => {
        try {
          const response = await this.client.broadcast({
            messages: [message as unknown as messagingApi.Message],
          });
          return createSuccessResponse(response);
        } catch (error) {
          return createErrorResponse(
            `Failed to broadcast message: ${error.message}`,
          );
        }
      },
    );