Agent Arcade: Reasoning Games · Twenty Four Check

import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://agent-arcade.use.x402atlas.com/twenty-four/check", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "answer": "12*((9-13)+6)",
    "challenge_id": "sha256:91ea634735ae4ff57c83ef8f3f08fdecf0b146d41582264bdcbb64b560f36cce",
    "date": "2026-07-01",
    "difficulty": "normal",
    "generation_version": "v1"
  }),
});
const data = await res.json();

curl -X POST \
  "https://agent-arcade.use.x402atlas.com/twenty-four/check" \
  -H "Content-Type: application/json" \
  -d '{"answer":"12*((9-13)+6)","challenge_id":"sha256:91ea634735ae4ff57c83ef8f3f08fdecf0b146d41582264bdcbb64b560f36cce","date":"2026-07-01","difficulty":"normal","generation_version":"v1"}' \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "challenge_id": "sha256:91ea634735ae4ff57c83ef8f3f08fdecf0b146d41582264bdcbb64b560f36cce",
  "correct": true,
  "feedback": {
    "message": "correct: the expression evaluates to exactly 24",
    "numbers_used": [
      12,
      9,
      13,
      6
    ]
  },
  "game": "twenty-four",
  "proof": {
    "exact_value": "24",
    "normalized_expression": "(12 * ((9 - 13) + 6))",
    "numbers_used": [
      12,
      9,
      13,
      6
    ]
  },
  "score": 100,
  "valid": true
}