Can the official LINE Bot MCP read my personal chats?

The official Bot MCP is designed around LINE Official Accounts and the Messaging API. A user's existing personal chats require a different connection model.

Does Yomi require a LINE bot or the Messaging API?

No. Yomi logs into the user's own LINE account as a secondary device and handles LINE's protocol and Letter Sealing messages directly. Yomi is unofficial, so users should evaluate the account risk.

Does Yomi send LINE messages to the cloud?

Yomi decrypts messages and media on the user's device and keeps its search index local. It still communicates with LINE to access the account. The first semantic search downloads an embedding model but sends no LINE message content to the model source.

LINE × Model Context Protocol

What is a LINE MCP server?
Connect personal LINE to AI

Q: What is a LINE MCP server?

A LINE MCP server connects an AI agent that supports the Model Context Protocol to LINE capabilities. Implementations may operate a LINE Official Account, automate the desktop app, or connect to a user's personal account, as Yomi does.

A LINE MCP server connects an AI agent such as Claude to LINE. The important question is what kind of LINE it connects to: an Official Account, the desktop app, or the personal account you already use.

The short answer: choose the official Bot MCP for a LINE Official Account. Choose Yomi when a local AI agent needs to read, search, and reply to conversations in your existing personal LINE account.

Comparison

Three ways to connect LINE and AI

Approach	Connects to	Best for	Main limitation
Official LINE Bot MCP	LINE Official Account	Customer service, notifications, brand bots, and Messaging API workflows	It is not a user's existing personal chat account
LINE Desktop automation	The LINE desktop interface	Driving an existing desktop application through its UI	Depends on window and interface state; implementations vary
Yomi personal LINE MCP	Your own personal LINE account	Reading, replying, searching existing chats, and local E2EE handling	Unofficial; a secondary device may not receive all older history

How does Yomi connect to personal LINE?

01 · LOGIN

Log in as a secondary device

Yomi logs into your own LINE account. There is no bot account, channel access token, or webhook to create.

02 · PROTOCOL

Speak LINE's protocol directly

It does not hunt for buttons on the screen. A local MCP server gives the AI agent explicit tools.

03 · E2EE

Decrypt Letter Sealing locally

Available E2EE messages and media decrypt on your device, and the search index stays local.

04 · MCP

Expose tools to Claude or another agent

The agent can summarize unread chats, search conversations, reply, send media, and surface conversations waiting on you.

When is Yomi a good fit?

• You want Claude to organize unread messages from your personal LINE account.
• You need to search past discussions across groups and one-to-one chats.
• You want AI assistance with replies, images, mentions, or explicit read receipts.
• You want message decryption, indexing, and semantic search to stay local.

Limits and risk you should know

Yomi is an independent, unofficial open-source project. It is not affiliated with or endorsed by LINE. Running an additional client may conflict with LINE's Terms of Service and can carry rate-limiting or account-suspension risk.

LINE may also withhold older one-to-one history or superseded group encryption keys from a secondary device. Yomi reports missing decryption material instead of inventing content it cannot read.

YOMI v0.3.1 · OPEN SOURCE

Connect your personal LINE to an AI agent

Claude Desktop can install the MCPB extension for your operating system. Claude Code and other local MCP clients can run the npm package.

Download latest release → View on GitHub ↗

What is a LINE MCP server?Connect personal LINE to AI