matrix-mcp 0.1.1

A Matrix MCP server for connecting coding agents to Matrix and MindRoom conversations.

Matrix MCP

Local-first Matrix access for MCP clients.

Matrix MCP lets Claude Code and other MCP clients read and write Matrix rooms. It is intended to make MindRoom conversations available to local coding agents without giving hosted agents access to the local filesystem.

Install

uv tool install matrix-mcp

For local development:

uv sync --extra dev

Login

Matrix SSO:

matrix-mcp auth sso https://matrix.example.com

Existing Matrix access token:

matrix-mcp auth token https://matrix.example.com @alice:example.com "$MATRIX_ACCESS_TOKEN" --device-id DEVICEID

Password auth, when enabled by the homeserver:

matrix-mcp auth password https://matrix.example.com @alice:example.com

Credentials are stored in the user config directory reported by:

matrix-mcp config-path

Remove stored credentials:

matrix-mcp auth logout

Claude Code

Add the local MCP server:

claude mcp add matrix -- matrix-mcp serve

The server runs over stdio. It does not expose a local HTTP port during normal MCP operation.

Tools

• matrix_whoami: show the configured Matrix user/device.
• matrix_list_rooms: list rooms joined by the authenticated user.
• matrix_read_room_recent: read recent text events from a room.
• matrix_read_thread: read a Matrix thread root and its recent text replies.
• matrix_send_message: send a text message, optionally as a Matrix thread reply.
• matrix_reply_thread: reply to an existing Matrix thread.

The tool instructions tell clients to prefer read tools first and only send messages when the user explicitly asks.

Development

uv run --extra dev pytest
uv run --extra dev ruff check .
uv run --extra dev ruff format --check .
uv run --extra dev mypy src tests
uv run --extra dev ty check
uv build