Chess FEN MCP Server
from Bigsy
Validate and visualize chess positions using FEN notation.
🔥🔥✓ VerifiedFreeQuick setup
Chess FEN MCP Server
A Model Context Protocol (MCP) server that provides chess FEN notation validation and visualization capabilities.
Features
- Convert FEN (Forsyth-Edwards Notation) strings to ASCII chess board visualizations
- Easy integration with MCP-compatible AI assistants allowing them to validate their generated FEN strings
- Installable via npx
Development
git clone
cd chess-fen-mcp
npm install
npm run devCopy & paste — that's it
npx chess-fen-mcpInstallation
npx chess-fen-mcpOr install globally:
npm install -g chess-fen-mcpUsage
As MCP Server
Add to your MCP client configuration (Claude Desktop, etc.):
{
"mcpServers": {
"chess-fen": {
"command": "npx",
"args": ["chess-fen-mcp"]
}
}
}If installed globally, you can also use:
{
"mcpServers": {
"chess-fen": {
"command": "chess-fen-mcp"
}
}
}Available Tools
visualize_fen
Converts a FEN string to an ASCII chess board visualization.
Parameters:
fen_string(string, required): FEN notation string
Example Input:
fen_string: "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"Example Output:
Fen {
rows: 8,
columns: 8,
board: [
a b c d e f g h
8 ♜ ♞ ♝ ♛ ♚ ♝ ♞ ♜ 8
7 ♟ ♟ ♟ ♟ ♟ ♟ ♟ ♟ 7
6 . . . . . . . . 6
5 . . . . . . . . 5
4 . . . . . . . . 4
3 . . . . . . . . 3
2 ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ 2
1 ♖ ♘ ♗ ♕ ♔ ♗ ♘ ♖ 1
a b c d e f g h
],
toMove: 'white',
castlingRights: {
white: { queenside: true, kingside: true },
black: { queenside: true, kingside: true }
},
enPassantSquare: '-',
halfMoves: 0,
fullMoves: 1
}No common issues documented yet. If you hit a problem, the repository's GitHub Issues page is the best place to look.
License
MIT