mcpbeat

Chess Eval MCP Server

com.x402supply/chess-eval
answering

Chess Eval is answering right now. Last checked 12 min ago. It exposes 2 tools.

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

Uptime history 40 hours of history
40 hours agonow
100.0%
Uptime 24h
91 of 91 checks
2
Tools
read from the server
217 ms
Response time
average over 24h
open, no key
Access
streamable-http

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

run in your terminal
claude mcp add chess-eval --transport http https://chess-eval.x402supply.com/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "chess-eval": {
      "url": "https://chess-eval.x402supply.com/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.chess-eval]
url = "https://chess-eval.x402supply.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "chess-eval": {
      "url": "https://chess-eval.x402supply.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "chess-eval": {
      "url": "https://chess-eval.x402supply.com/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

best
best_line
Play out Stockfish's predicted principal variation as SAN moves with a per-ply eval, re-searching after each ply.
evaluate
evaluate_position
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.

Endpoints

URLTransportStateLatencyChecked
https://chess-eval.x402supply.com/mcp streamable-http answering 237 ms 12 min ago

Chess Eval — questions

Answers built from our own checks of this server.

What can Chess Eval do?
It exposes 2 tools, read directly from the server on our last check. Among them: best_line, evaluate_position. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Chess Eval working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 217 ms. The bar chart above shows every period we have measured.
How do I connect Chess Eval?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Chess Eval need an API key?
No. Chess Eval completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Chess Eval?
It answers our handshake in 217 ms on average, which is faster than 59% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.