MCP server for AI-assisted control of Neovim via msgpack-RPC
Project description
nvim-mcp
nvim-mcp is an MCP server that lets AI assistants (Cursor, Claude, and others) control a running Neovim session: open buffers, move the cursor, run LSP actions, inspect layout, and more. It talks to Neovim directly over its default Unix socket using msgpack-RPC, discovers instances automatically, and exposes four tools.
Platforms: Linux and macOS only.
Install
uv tool install nvim-mcp
Or run without installing:
uvx nvim-mcp
Quick start
- Start Neovim (it listens on an RPC socket by default).
- Set up your MCP client and agent rules — see
config/for everything you need. - The assistant can now control Neovim through 4 tools.
Tools
| Tool | Purpose |
|---|---|
nvim_send |
The universal interface. Send any ex command, Vimscript expression, or key sequence to Neovim. Three modes: command, eval, keys. |
nvim_state |
Structured snapshot: current file, cursor position, mode, window layout, modified buffers, cwd, and more. |
nvim_connect |
Connect to a Neovim instance. Auto-connects when only one exists; lists all when multiple are found. |
nvim_recipes |
Browse operation recipes by category (files, navigation, buffers, windows, marks, registers, folds, LSP). |
Multi-instance
One Neovim instance running? Tools auto-connect. Multiple? nvim_connect lists them — pick by index, socket_path, or terminal_pid. Set NVIM_SOCKET_PATH to skip discovery entirely.
Setup
See config/ for MCP client registration (Cursor, Claude Desktop, Claude CLI) and example agent rule files.
Requirements
- Python ≥ 3.10
- Linux or macOS
- Neovim with RPC socket enabled (default)
License
MIT — see LICENSE.
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