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How to connect LINE to Claude Cowork

Connect Claude Cowork to LINE MCP. Send coupon broadcast to line followers, create rich menu for promotions, and more using natural language, with authentication handled for you.

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LINE is a messaging platform and Official Account service for customer chat and broadcasts. Use it to reach customers in real time with rich, branded conversations.

13 Tools

Introduction

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your LINE account to Cowork via Composio Connect, enabling it to send coupon broadcast to LINE followers, create rich menu for promotions, list LINE audience groups by size, and more such actions on your behalf without compromising your account security.

Also integrate LINE with

ChatGPT Work

Connecting LINE to Claude Cowork

1. Open Customize

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

2. Add the Composio MCP server

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

3. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Cowork

4. Connect your LINE account

Back in Cowork, ask the agent to connect to LINE or give it any LINE-related task.

For example, ask Cowork to:

  • "Send coupon broadcast to LINE followers"
  • "Create rich menu for promotions"
  • "List LINE audience groups by size"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your LINE account is ready to use.

What is Claude Cowork?

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like LINE through MCP without you sharing account credentials directly with the agent.

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

The LINE MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your LINE account. It provides structured and secure access so your agent can perform LINE operations on your behalf.

TOOLS

Supported Tools

Every LINE action and event your agent gets out of the box.

Create Rich Menu

Create a rich-menu definition and return its ID.

Create Rich Menu with Image

Create a rich-menu definition and upload its JPEG or PNG image in one call.

Delete Rich Menu

Permanently delete a rich menu by ID.

Download Message Content Preview

Download LINE's reduced-size preview image for a retained image or video message whose contentProvider.

Get Message Delivery Count

Get the number of reply, push, multicast, or broadcast messages sent on one UTC+9 calendar date.

Get Rich Menu

Get one Messaging API rich-menu definition by ID, including its canvas, tappable areas, and actions.

Link or Unlink User Rich Menu

Link or unlink a per-user rich menu.

List Chat Member IDs

Return one page of member user IDs for a group or legacy room containing the bot.

List Follower IDs

Return one page of user IDs for friends of the LINE Official Account.

List Rich Menus

List all rich menus created through the Messaging API.

Mark Messages as Read

Mark all messages through a webhook-issued read token as read.

Set or Clear Default Rich Menu

Set or clear the Messaging API default rich menu.

Upload Rich Menu Image

Upload a JPEG or PNG image for a rich menu.

FRAMEWORKS

How to build LINE MCP Agent with another framework

ChatGPT Work logo

ChatGPT Work

Use LINE MCP with ChatGPT Work

FAQ

Frequently asked questions

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

Yes, you can. Claude Cowork 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 LINE tools.

Yes, absolutely. You can configure which LINE 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.

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 LINE data and credentials are handled as safely as possible.

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