LINE MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with LINE MCP or direct API to send messages, manage audiences, query user interactions, and configure rich menus through natural language.

LINE logoLINE
Api Key

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

Try LINE now

Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
LINE
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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.

SETUP GUIDE

Connect LINE MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
Install the Composio SDK for Python or TypeScript
2

Initialize Client and Create Tool Router Session

typescript
import { Composio } from '@composio/core';

const composio = new Composio({ apiKey: 'your-api-key' });
const session = await composio.create('your-user-id');
console.log(`Tool Router session created: ${session.mcp.url}`);
Import and initialize the Composio client, then create a Tool Router session for LINE
3

Connect to AI Agent

typescript
import { openai } from '@ai-sdk/openai';
import { experimental_createMCPClient as createMCPClient } from '@ai-sdk/mcp';
import { generateText } from 'ai';

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: session.mcp.url,
    headers: {
      'x-api-key': 'your-composio-api-key',
    },
  },
});

const tools = await client.tools();
const { text } = await generateText({
  model: openai('gpt-4o'),
  tools,
  messages: [{
    role: 'user',
    content: 'Create a LINE rich menu named Weekend Promo that links users to https://example.com/sale.'
  }],
  maxSteps: 5,
});

console.log(`Agent: ${text}`);
Use the MCP server with your AI agent (Anthropic Claude or Mastra)
SETUP GUIDE

Connect LINE API Tool with your Agent

1

Install Composio

typescript
npm install @composio/openai
Install the Composio SDK
2

Initialize Composio and Create Tool Router Session

typescript
import OpenAI from 'openai';
import { Composio } from '@composio/core';
import { OpenAIResponsesProvider } from '@composio/openai';

const composio = new Composio({
  provider: new OpenAIResponsesProvider(),
});
const openai = new OpenAI({});
const session = await composio.create('your-user-id');
Import and initialize Composio client, then create a Tool Router session
3

Execute LINE Tools via Tool Router with Your Agent

typescript
const tools = session.tools;
const response = await openai.responses.create({
  model: 'gpt-4.1',
  tools: tools,
  input: [{
    role: 'user',
    content: 'Send a LINE push message to user U1234567890abcdef saying Your order is ready for pickup.'
  }],
});
const result = await composio.provider.handleToolCalls(
  'your-user-id',
  response.output
);
console.log(result);
Get tools from Tool Router session and execute LINE actions with your Agent

Why Use Composio?

AI Native LINE Integration

  • Supports both LINE MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable Messaging API execution
  • Rich coverage for sending messages, managing audiences, and working with rich menus

Secure API Key Auth

  • Store LINE channel access tokens and API keys securely instead of hard-coding them
  • Central place to manage, scope, and revoke LINE access per user or environment
  • Composio handles secure credential storage and API request handling for you

Agent Optimized Design

  • LINE tools are tuned for agents, so message, audience, and rich menu actions are easier to call correctly
  • Tools are improved using real error and success rates to boost reliability over time
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access LINE
  • Scoped, least privilege access to LINE Official Account resources
  • Full audit trail of agent actions to support review and compliance
FRAMEWORKS

Use LINE with any AI Agent Framework

Choose a Framework you want to connect LINE with

FAQ

Frequently asked questions

Yes, LINE requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Yes. Composio is SOC 2 Type II compliant and is built to keep your LINE connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.

Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

Create the key in your LINE account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the LINE actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside LINE at any time.

When you connect a LINE account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in LINE as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.

Whatever the credentials you connect allow inside LINE. If LINE lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside LINE at any time.

Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each LINE connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.

The connection stops working the moment LINE rejects the old key. Create a new key in LINE and reconnect the account from the Composio dashboard or by asking your agent to reconnect LINE. Nothing else changes.

Composio's free plan includes 100,000 tool calls per month with no credit card, which covers most personal LINE use. Paid plans add higher limits and team features. Your LINE plan and its API limits still apply as usual.

Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple LINE accounts).

With Composio, you connect LINE once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.

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