How to connect LINE to Grok Bot

Connect Grok Bot 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

Grok is xAI's assistant, and its bot builder lets you create a personal agent that holds context, runs skills, and connects to the apps you already use through plugins.

This guide explains how to connect LINE to a Grok bot using Composio Connect, which handles OAuth, token refresh, and reliability so you do not have to. You add Composio as a plugin, authenticate once, then ask your bot to work with LINE in plain language.

Also integrate LINE with

Why use Composio?

Composio exposes 1,500+ apps to your Grok bot through a single connection, so you get:

  • Connect to 1,500+ apps with on-demand tool loading, so you do not fill your context window with unnecessary tool definitions.
  • Use programmatic tool calling through a remote workbench, letting the model write its own code to handle complex tool chaining. This reduces back-and-forth for frequent tool calls.
  • Handle large tool responses outside the model context to keep conversations lean.

Connecting LINE to Grok Bot

Once Grok Bot is set up, you connect LINE entirely from its interface, and the whole flow takes under a minute.

Set up Grok Bot

Get access. Grok Bot is included with Cursor Ultra, Cursor Premium Teams, and SuperGrok Heavy. Get the desktop app for macOS or Windows from x.ai/bot and sign in. An iPhone companion app is also available, and your bots sync across devices.

Create a bot. Pick a suggested role or define your own, then give it a short name, one primary job, and a short description of how it should work. Focused bots work best, because a clear role gives the bot more useful context over time.

Connect LINE

1. Add the Composio plugin

Click the button. The Composio listing on x.ai opens and launches Grok Bot for you. If the app does not open on its own, click Add to Grok Bot.

Add to Grok Bot

Composio for Grok Bot listing on x.ai with the Add to Grok Bot button

Grok Bot opens the Composio plugin, showing its connector and skills. Click Add.

Composio plugin sheet in Grok Bot with the Add button

2. Authenticate

Go to the Installed section and click the Composio entry. You'll see its connector and skills listed.

Installed Composio plugin showing the Authenticate button

Click Authenticate. You'll be taken to the Composio consent screen. Review the access it requests and click Authorize. Composio handles the OAuth handshake for you, so you never touch API keys or tokens.

Composio authorization screen with Authorize and Deny

3. Connect your LINE account

Back in the chat, ask your bot to connect to LINE or give it any LINE task.

For example, ask it 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 your Grok bot, and your LINE account is ready to use.

What is Grok Bot?

Grok is xAI's assistant, available as a chat interface and a bot builder for creating personal agents that run skills and connect to external apps.

With Composio Connect, your Grok bot 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 to your Official Account messages, followers, chat members, rich menus, and delivery counts, so your agent can send and reply to messages, manage rich menus, review audiences, mark messages as read, and track message delivery on your behalf.

  • Message sending and replies: Have your agent send text messages to users or chats and reply to incoming messages from your LINE Official Account.
  • Rich menu management: Direct your agent to create, view, list, update with images, or delete rich menus for your audience.
  • Personalized menu assignment: Let the agent assign or remove rich menus for individual users and set or clear the default menu.
  • Audience and chat review: Instruct your agent to list your Official Account followers or review the members of a group chat or room.
  • Message monitoring: Have your agent mark incoming messages as read, check daily delivery totals, or retrieve preview images from retained media messages.

Way Forward

Now that LINE is connected, extend your setup by connecting the other apps you already use every day, so your Grok bot can run true cross-app workflows end to end.

  • Connect Calendar to turn threads into scheduled meetings automatically.
  • Connect Slack or Teams to post summaries, approvals, and alerts where your team works.
  • Connect Notion, Linear, Jira, or Asana to convert requests into tickets, tasks, and docs.
  • Connect Drive, Dropbox, or OneDrive to fetch, file, and share attachments without manual steps.

Start with one workflow you do repeatedly, then keep adding apps as you find new handoffs. With everything behind a single connection, your bot can coordinate multiple tools safely and reliably in one conversation.

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

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. Grok Bot 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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