Agent Arcade: Reasoning Games

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1

0.005 USDC
Atomic price: 5000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Payment option 2

0.005 USDC
Atomic price: 5000 · Network: eip155:137 · Asset: USDC · Scheme: exact

Payment option 3

0.005 USDC
Atomic price: 5000 · Network: eip155:42161 · Asset: USDC · Scheme: exact

Payment option 4

0.005 USDC
Atomic price: 5000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "5000",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "5000",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "5000",
    "payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ"
  }
]

Observed health

Status

Reachable

Latest latency

12 ms

Average latency

14 ms

HTTP status

405

Last checked

2026-11-01T05:56:11.303Z

Reachability

100% over 9 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "additionalProperties": false,
      "description": "Twenty-Four answer-check request using the identity from a daily challenge.",
      "properties": {
        "answer": {
          "description": "Twenty-Four arithmetic expression using each supplied number exactly once with + - * / and parentheses, evaluating to exactly 24",
          "maxLength": 256,
          "type": "string"
        },
        "challenge_id": {
          "description": "The challenge_id from the daily envelope (sha256:...)",
          "pattern": "^sha256:[0-9a-f]{64}$",
          "type": "string"
        },
        "date": {
          "description": "UTC challenge date (YYYY-MM-DD)",
          "format": "date",
          "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
          "type": "string"
        },
        "difficulty": {
          "description": "Challenge difficulty",
          "enum": [
            "normal"
          ],
          "type": "string"
        },
        "generation_version": {
          "description": "Pinned generator version of the referenced challenge",
          "enum": [
            "v1"
          ],
          "type": "string"
        }
      },
      "required": [
        "challenge_id",
        "generation_version",
        "date",
        "difficulty",
        "answer"
      ],
      "type": "object"
    },
    "bodyType": {
      "enum": [
        "json",
        "form-data",
        "text"
      ],
      "type": "string"
    },
    "method": {
      "enum": [
        "POST"
      ],
      "type": "string"
    },
    "type": {
      "const": "http",
      "type": "string"
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "type": "object"
}

Output schema

{
  "properties": {
    "example": {
      "additionalProperties": false,
      "description": "Twenty-Four answer-check verdict.",
      "properties": {
        "challenge_id": {
          "description": "Canonical ID of the checked challenge",
          "type": "string"
        },
        "correct": {
          "description": "The expression solves the challenge (equals 24 exactly)",
          "type": "boolean"
        },
        "feedback": {
          "additionalProperties": false,
          "description": "Validity feedback; never contains a solution the client did not produce",
          "properties": {
            "message": {
              "type": "string"
            },
            "numbers_used": {
              "items": {
                "type": "integer"
              },
              "type": "array"
            }
          },
          "required": [
            "message",
            "numbers_used"
          ],
          "type": "object"
        },
        "game": {
          "description": "Twenty-Four game identity.",
          "enum": [
            "twenty-four"
          ],
          "type": "string"
        },
        "proof": {
          "additionalProperties": false,
          "description": "Present only when correct: the client's own verified expression, normalized, with its exact value",
          "properties": {
            "exact_value": {
              "type": "string"
            },
            "normalized_expression": {
              "type": "string"
            },
            "numbers_used": {
              "items": {
                "type": "integer"
              },
              "type": "array"
            }
          },
          "required": [
            "normalized_expression",
            "exact_value",
            "numbers_used"
          ],
          "type": "object"
        },
        "score": {
          "description": "Informational score: 100 correct, 0 otherwise",
          "type": "integer"
        },
        "valid": {
          "description": "The expression follows the rules",
          "type": "boolean"
        }
      },
      "required": [
        "challenge_id",
        "game",
        "valid",
        "correct",
        "score",
        "feedback"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}