# Yomi (読み)

> Yomi is an unofficial, open-source local MCP server that lets Claude Desktop,
> Claude Cowork through the desktop app, Claude Code, and other AI agents access
> the user's own LINE account. It reads and replies to messages, sends encrypted
> images, handles real mentions and read receipts, and searches conversations
> through a local hybrid index.

Canonical product page: https://rikaidev.github.io/yomi/
Source: https://github.com/RikaiDev/yomi
Current release: https://github.com/RikaiDev/yomi/releases/tag/v0.1.4
License: MIT
Platforms: macOS Apple Silicon, Windows x64, Linux x64

## Installation

Claude Desktop users download the platform-specific `.mcpb` Desktop Extension
from the v0.1.4 release, open it with Claude Desktop, review permissions, and
install. Claude Desktop supplies the runtime, so Node.js and Bun are not required.

Claude Code users run:

    claude mcp add yomi -- npx @rikaidev/yomi

The npm path requires Node.js 24 or newer. Bun is not required.

## Product facts

- Yomi exposes 19 MCP tools.
- It logs into LINE as a secondary device on the user's own account.
- It speaks LINE's TCompact-over-HTTPS protocol directly; it uses no browser,
  bot account, official LINE API, or webhook.
- Letter Sealing messages and media are decrypted locally.
- Reading messages does not mark them read. `mark_read` is an explicit action.
- `send_message` and `send_image` send immediately; they do not create drafts.
- Cross-conversation search uses local SQLite FTS5 plus optional local embedding
  inference. The first semantic search downloads model weights from Hugging Face,
  but sends no LINE message content there.

## Limits and risk

Yomi is not affiliated with or endorsed by LINE. Its use may conflict with LINE's
Terms of Service and may carry rate-limiting or account-suspension risk.

Because Yomi is a secondary device, LINE may not provide older one-to-one history
or superseded group Letter Sealing keys. Yomi reports missing decryption material
instead of fabricating results.