How to integrate Chatwork MCP with Codex

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Introduction

Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Chatwork MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.

Also integrate Chatwork with

Why use Composio?

Apart from a managed and hosted MCP server, you will get:

  • CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Large tool responses: Handle them to minimise context rot.
  • Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so GPTs aren't overwhelmed by tools you don't need.

How to install Chatwork MCP in Codex

Run the setup command

Run this command in your terminal to add the Composio MCP server to Codex.

Terminal

It will initiate the authentication in a browser window, authorize Codex to access your Composio account.

Composio authentication page

(Optional) Authenticate with OAuth

To authenticate manually, run the login command to open a browser window and authorize Codex to access your Composio account.

bash
codex mcp login composio

Verify the connection

Run codex mcp list to confirm Composio appears as a registered MCP server.

bash
codex mcp list

Codex App

Codex App follows the same approach as VS Code.

  1. Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
  2. Fill the header and Key fields with { "x-consumer-api-key" = "ck_*******" }.
  3. The Key is the Composio API key, that you can find on dashboard.composio.dev
  4. Click on Authenticate and authorize Codex to your Composio account and you're all set.
Codex App MCP setup
  1. Restart and verify if it's there in .codex/config.toml
bash
[mcp_servers.composio]
url = "https://connect.composio.dev/mcp"
http_headers = { "x-consumer-api-key" = "ck_*******" }

What is the Chatwork MCP server, and what's possible with it?

The Chatwork MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Chatwork account. It provides structured and secure access to your chats, contacts, files, and rooms, so your agent can perform actions like sending messages, managing tasks, retrieving files, and organizing team communications on your behalf.

  • Room and member management: Easily fetch all chat rooms, list members in any room, and keep your workspace organized by letting your agent handle the heavy lifting.
  • Smart message retrieval and deletion: Have your agent pull recent messages from any chat, search for important info, or even delete specific messages when needed.
  • File sharing and retrieval: Seamlessly upload files to any Chatwork room or retrieve details and download links for files already shared, making document collaboration a breeze.
  • Contact and status insights: Instantly get a list of all your Chatwork contacts or check your current unread messages and task status without switching tabs.
  • Automated task and notification workflows: Let your agent monitor unread messages, mentions, and tasks, helping you stay on top of communication and never miss an important update.

Supported Tools & Triggers

Tools
Create Chatwork RoomTool to create a new group chat room in Chatwork.
Create Room Invitation LinkTool to create an invitation link for a Chatwork room.
Create Task in Chatwork RoomTool to create a new task in a Chatwork room.
Delete MessageThis tool allows you to delete a specific message from a Chatwork room by calling the DELETE endpoint at https://api.
Delete or Leave Chatwork RoomTool to leave or delete a Chatwork room.
Delete Room LinkDelete the invitation link for a Chatwork room.
Get Chatwork ContactsThis tool retrieves a list of all contacts from Chatwork.
Get Chatwork File InformationTool to get information about a specific file in a chat room.
Get Incoming Contact RequestsTool to retrieve pending contact approval requests received by the authenticated user.
Get My Chatwork ProfileTool to retrieve the authenticated user's profile information including account details, organization, contact information, and avatar URL.
Get MessageTool to retrieve information about a specific message in a Chatwork room.
Get My Chatwork StatusThis tool retrieves the current status of the authenticated user, including unread message counts and task status.
Get My Chatwork TasksTool to retrieve the authenticated user's task list from Chatwork (up to 100 items).
Get Chatwork RoomRetrieves detailed information about a specific Chatwork room using the API endpoint GET /rooms/{room_id}.
Get Room FilesTool to get list of files in a chat room (up to 100 files).
Get Room Invitation LinkRetrieves the invitation link for a specified Chatwork room using the API endpoint GET /rooms/{room_id}/link.
Get Room MembersRetrieves a complete list of all members in a specified Chatwork room using the API endpoint GET /rooms/{room_id}/members.
Get Room Messages V2Tool to retrieve messages from a Chatwork room (up to 100 messages).
Get Chatwork RoomsTool to retrieve a list of all chat rooms the authenticated user belongs to.
Get Room TasksRetrieves a list of tasks from a Chatwork room.
Get TaskRetrieves detailed information about a specific task in a Chatwork room using the API endpoint GET /rooms/{room_id}/tasks/{task_id}.
Mark Messages as ReadTool to mark messages as read in a Chatwork room.
Mark Messages as UnreadTool to mark messages as unread in a Chatwork room.
Post MessageTool to post a new message to a Chatwork room.
Update MessageTool to update an existing message in a Chatwork room.
Update Chatwork RoomTool to update chat room information (name, icon, description).
Update Room Invitation LinkTool to update the invitation link settings for a Chatwork room.
Update Room MembersUpdates the complete member list of a Chatwork room with bulk assignment of member roles (admin, member, readonly).
Update Task StatusTool to update the completion status of a task in a Chatwork room.
Upload File to Chatwork RoomThis tool allows users to upload files to a specific Chatwork room.

Conclusion

You've successfully integrated Chatwork with Codex using Composio's MCP server. Now you can interact with Chatwork directly from your terminal, VS Code, or the Codex App using natural language commands.

Key benefits of this setup:

  • Seamless integration across CLI, VS Code, and standalone app
  • Natural language commands for Chatwork operations
  • Managed authentication through Composio
  • Access to 20,000+ tools across 1000+ apps for cross-app workflows
  • CodeAct workbench for complex tool chaining

Next steps:

  • Try asking Codex to perform various Chatwork operations
  • Explore cross-app workflows by connecting more toolkits
  • Build automation scripts that leverage Codex's AI capabilities

How to build Chatwork MCP Agent with another framework

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CrewAI

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FAQ

What are the differences in Tool Router MCP and Chatwork MCP?

With a standalone Chatwork MCP server, the agents and LLMs can only access a fixed set of Chatwork tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Chatwork and many other apps based on the task at hand, all through a single MCP endpoint.

Can I use Tool Router MCP with Codex?

Yes, you can. Codex fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Chatwork tools.

Can I manage the permissions and scopes for Chatwork while using Tool Router?

Yes, absolutely. You can configure which Chatwork scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Chatwork data and credentials are handled as safely as possible.

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