# Agent Arcade: Twenty-Four Daily Math Puzzle

> Agent Arcade: Twenty-Four Daily Math Puzzle is a paid API for AI agents from agent-arcade.use.x402atlas.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns today's UTC Twenty-Four puzzle — four integers that an agent must combine using arithmetic operators to produce exactly 24.

## Facts

- Endpoint: GET https://agent-arcade.use.x402atlas.com/twenty-four/daily
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-arcade-twenty-four-daily-math-puzzle-f0ca43b4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LPni-fYdbTa-g-TUddrfy

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agent-arcade-twenty-four-daily-math-puzzle-f0ca43b4
```

Example prompt: Fetch today's Twenty-Four puzzle from Agent Arcade — I want the four numbers I need to combine into 24 using basic arithmetic so I can try to solve it.

## When to prefer this

Choose this endpoint when you need a deterministic, reproducible daily math reasoning challenge specifically designed for agent benchmarking — the puzzle is fixed per UTC day so results are comparable across runs and agents. Prefer it over generic math APIs when you want a structured game format with explicit rules, difficulty metadata, and attribution, or when evaluating an agent's arithmetic reasoning and combinatorial search abilities.

## Known failure modes

- No query parameters accepted — passing any query params will be ignored or may cause an error
- Stale puzzle if called at UTC midnight boundary — the puzzle rotates at UTC 00:00 so calls straddling midnight may return either day's puzzle
- Payment failure (402) if the x402 USDC payment of $0.005 is not correctly attached
- Network timeout or 5xx if the upstream puzzle generator is temporarily unavailable

## How this service works

Twenty-Four daily math puzzle — four numbers to combine into exactly 24; deterministic solvable UTC daily challenge for agent reasoning benchmarks.

## Output

Returns a JSON object containing the challenge_id, the game identifier ('twenty-four'), the UTC date, difficulty rating, four integers (each 1–13) to be combined, the fixed target of 24, the full arithmetic ruleset (allowed operators +−×÷, parentheses allowed, each number used exactly once, no unary operators), a prompt object, a generation version, and attribution metadata.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "date": "2026-07-01",
  "game": "twenty-four",
  "rules": {
   "target": 24,
   "arithmetic": "exact rational arithmetic; division by zero is invalid; the result must equal 24 exactly",
   "allowed_operators": [
    "+",
    "-",
    "*",
    "/"
   ],
   "parentheses_allowed": true,
   "integer_literals_only": true,
   "unary_operators_allowed": false,
   "use_each_number_exactly_once": true
  },
  "prompt": {
   "target": 24,
   "numbers": [
    12,
    13,
    9,
    6
   ]
  },
  "difficulty": "normal",
  "attribution": null,
  "challenge_id": "sha256:91ea634735ae4ff57c83ef8f3f08fdecf0b146d41582264bdcbb64b560f36cce",
  "generation_version": "v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-arcade-twenty-four-daily-math-puzzle-f0ca43b4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-arcade.use.x402atlas.com](https://www.zero.xyz/host/agent-arcade.use.x402atlas.com/llms.txt)