MCP server

Chess Eval

com.x402supply/chess-eval

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Stockfish chess eval: best move, score, principal variation, multipv. $0.005/call via x402.

Website

At a glance

Type

MCP server

Publisher

x402supply.com (verified by the MCP Registry)

Status

Working at last check

Tools

2

Token cost

About 272 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http chess-eval https://chess-eval.x402supply.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.chess-eval]
url = "https://chess-eval.x402supply.com/mcp"

Gemini CLI

{"mcpServers":{"chess-eval":{"httpUrl":"https://chess-eval.x402supply.com/mcp"}}}

Cursor

{"mcpServers":{"chess-eval":{"url":"https://chess-eval.x402supply.com/mcp"}}}

VS Code

{"servers":{"chess-eval":{"type":"http","url":"https://chess-eval.x402supply.com/mcp"}}}

Antigravity

agy mcp add chess-eval https://chess-eval.x402supply.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"chess-eval","server_url":"https://chess-eval.x402supply.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"chess-eval","server_url":"https://chess-eval.x402supply.com/mcp"}

Tools

• best_line ~123 tokens
  Play out Stockfish's predicted principal variation as SAN moves with a per-ply eval, re-searching after each ply.
• evaluate_position ~149 tokens
  Evaluate a chess position with Stockfish: best move, centipawn/mate score, principal variation, and optional multipv. No mocks — a real single-threaded Stockfish 10 (asm.js) runs in-isolate per call.

Related MCP servers

• IGNOREO
  Paid tools for AI agents over x402: privacy scan, payment-address check, locks, seller marketplace
• Chessigma
  Chess opening guides and names, FEN and PGN checks, the daily chess puzzle and Elo estimates.
• ScoreCompute
  38 MCP tools: Rust computation, Discovery, composition, counterexample scans and signed checks.
• Stockfish Chess Engine - MCP Server
  Evaluates chess positions
• Lichess
  Lichess MCP — public read-only API for users, games, explorer, tablebase.
• QUEEN HCE-4 Chess Analysis
  Board-conditioned LLM chess analysis and best move
• BetterChess
  Chess MCP for Claude: engine analysis, attack maps, game review. One URL, no install.
• Moddable Games Tools
  15 tools for chess variant analysis, hex map generation, and board game utilities

Badge for your README

[![AptLynx](https://aptlynx.net/badge/com.x402supply/chess-eval.svg)](https://aptlynx.net/servers/com.x402supply/chess-eval)

Listing text is written by the maker; AptLynx lists tools and does not vouch for them. Find another tool · Browse by topic · For agents