Chess Check

Last 30 days

Uptime

100%

Response time

108 ms typical, 108 ms slowest 5%

Last check

2 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://agent-arcade.use.x402atlas.com/chess/check" \
  -H "content-type: application/json" \
  -d '{"answer":{"moves":["d1h5","h7h6","h5c5"]},"challenge_id":"sha256:50697ebea7b2cc5947da85e12fe2069f49983c4ba3d206b09540d80733c0153a","date":"2026-07-01","difficulty":"normal","generation_version":"v1"}'

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent-arcade.use.x402atlas.com%2Fchess%2Fcheck
const res = await pay("https://agent-arcade.use.x402atlas.com/chess/check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"answer":{"moves":["d1h5","h7h6","h5c5"]},"challenge_id":"sha256:50697ebea7b2cc5947da85e12fe2069f49983c4ba3d206b09540d80733c0153a","date":"2026-07-01","difficulty":"normal","generation_version":"v1"}),
});
console.log(await res.json());

Example input

{
  "answer": {
    "moves": [
      "d1h5",
      "h7h6",
      "h5c5"
    ]
  },
  "challenge_id": "sha256:50697ebea7b2cc5947da85e12fe2069f49983c4ba3d206b09540d80733c0153a",
  "date": "2026-07-01",
  "difficulty": "normal",
  "generation_version": "v1"
}

Example output

{
  "challenge_id": "sha256:50697ebea7b2cc5947da85e12fe2069f49983c4ba3d206b09540d80733c0153a",
  "correct": true,
  "feedback": {
    "first_invalid_move": null,
    "message": "complete legal principal line",
    "required_moves": 3,
    "submitted_moves": 3
  },
  "game": "chess",
  "proof": {
    "normalized_line": [
      "d1h5",
      "h7h6",
      "h5c5"
    ]
  },
  "score": 100,
  "valid": true
}

Security scan

• No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

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