---
title: LINE OA MCP and LINE Agent SDK
description: Connect a LINE Official Account to a LINE AI Agent from an AI tool. Allowed steps run on their own; steps for a person are marked and detected when done.
url: https://agentlab.cresclab.com/docs/en/line
language: en
updated: 2026-10-24
---

# LINE OA MCP and LINE Agent SDK

Connect a LINE Official Account to a LINE AI Agent from an AI tool. Allowed steps run on their own; steps for a person are marked and detected when done.

## What it is

LINE Agent SDK is the connection layer between an AI agent and a LINE Official Account (LINE OA). Whether you call the result a LINE Bot or a LINE AI Agent, it does one job: let an AI tool walk a person through the connection until the first real LINE message arrives.

- **LINE OA MCP**: MCP tools for Claude Code, Codex and Cursor.
- **HTTP API**: the same operations for programs that don't use MCP.
- **Panel**: the page where a person enters the Channel ID and Channel Secret and follows each step. The AI tool never handles a credential.

## Three ways in

- [Sandbox](https://agentlab.cresclab.com/docs/en/line/mcp-tools.md#tools): no Official Account yet. Add the shared sandbox as a friend, send a join code, and get the first message within minutes.
- [Create a new Official Account](https://agentlab.cresclab.com/docs/en/line/quickstart.md#first-message): you create the account and enable the Messaging API in LINE Official Account Manager while the AI walks you through it, then continue as an existing account.
- [Connect an existing account](https://agentlab.cresclab.com/docs/en/line/quickstart.md#first-message): only the Channel ID and Channel Secret. A read-only health check comes first, then push only, relay or direct, so an existing support system keeps working.

## What LINE does and doesn't let you automate

| Step                                                  | Who                                                                                    | How it's known to be done                                |
| ----------------------------------------------------- | -------------------------------------------------------------------------------------- | -------------------------------------------------------- |
| Create a LINE Official Account                        | A person, in LINE Official Account Manager                                             | No API                                                   |
| Enable the Messaging API and choose a provider        | A person; the provider defaults to your company name and can't be changed once created | No API                                                   |
| Enter the Channel ID and Channel Secret               | A person, in the panel                                                                 | A stateless channel access token is issued with them     |
| Set the webhook URL                                   | Automatic                                                                              | Written, then read back                                  |
| Turn on "Use webhook"                                 | A person, in the LINE Developers console                                               | Detected automatically: LINE reports `active`            |
| Add the account as a friend and send the pairing code | A person, on a phone                                                                   | The webhook receives the code                            |
| Send the first message                                | Automatic, a reply to the pairing message                                              | LINE accepts it, and replies don't use the monthly quota |

## Next

- [Run it on Agent Lab](https://agentlab.cresclab.com/docs/en/line/quickstart.md): deploy it as your own project from GitHub and connect an AI tool.
- [LINE OA MCP tools](https://agentlab.cresclab.com/docs/en/line/mcp-tools.md): the ten tools, how to connect and a typical run.
- [HTTP API](https://agentlab.cresclab.com/docs/en/line/api.md): endpoints, steps, the connection object and errors.