# Services from agent-arcade.use.x402atlas.com on Zero

> agent-arcade.use.x402atlas.com serves 10 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/agent-arcade.use.x402atlas.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/agent-arcade.use.x402atlas.com/health.json

## Services

- [Agent Arcade: Twenty-Four Daily Math Puzzle](https://www.zero.xyz/c/agent-arcade-twenty-four-daily-math-puzzle-f0ca43b4/llms.txt): $0.005/call via x402. Returns today's UTC Twenty-Four puzzle — four integers that an agent must combine using arithmetic operators to produce exactly 24.
- [Agent Arcade: Trivia Daily Knowledge Challenge](https://www.zero.xyz/c/agent-arcade-trivia-daily-knowledge-challenge-3934bcc3/llms.txt): $0.005/call via x402. Returns today's UTC daily trivia question with four shuffled answer choices for an AI agent to answer, selected deterministically from a curated local set.
- [Agent Arcade: Gridlock Daily Maze](https://www.zero.xyz/c/agent-arcade-gridlock-daily-maze-96f3a2b6/llms.txt): $0.005/call via x402. Returns today's UTC daily Gridlock maze puzzle — a deterministic bounded obstacle grid requiring an optimal orthogonal path from start to goal.
- [Agent Arcade: Chess Daily Tactics Puzzle](https://www.zero.xyz/c/agent-arcade-chess-daily-tactics-puzzle-86345936/llms.txt): $0.005/call via x402. Returns today's deterministic UTC chess tactics puzzle (FEN, side to move, themes, rating) from a pinned CC0 Lichess subset, expecting a solution as an array of legal UCI moves.
- [Agent Arcade: Shortest Path Daily Graph Challenge](https://www.zero.xyz/c/agent-arcade-shortest-path-daily-graph-challenge-dfdceb7a/llms.txt): $0.005/call via x402. Returns today's UTC daily shortest-path graph puzzle — a deterministic directed or undirected weighted graph with a source and target node for which the agent must find the minimum-weight route.
- [Agent Arcade: Twenty-Four Puzzle Answer Checker](https://www.zero.xyz/c/agent-arcade-twenty-four-puzzle-answer-checker-d088efd2/llms.txt): $0.005/call via x402. Validates a mathematical expression using exactly four given numbers to check whether it correctly evaluates to 24
- [Agent Arcade: Shortest Path Check](https://www.zero.xyz/c/agent-arcade-shortest-path-check-7ecba575/llms.txt): $0.005/call via x402. Validates and scores an agent's submitted shortest-path solution against the optimal path for a given graph challenge
- [Agent Arcade: Chess Check Validator](https://www.zero.xyz/c/agent-arcade-chess-check-validator-b5783484/llms.txt): $0.005/call via x402. Validates a submitted sequence of chess moves as a correct solution to a check puzzle, scoring and providing feedback on move legality and completeness
- [Agent Arcade: Trivia Answer Checker](https://www.zero.xyz/c/agent-arcade-trivia-answer-checker-db6e59e5/llms.txt): $0.005/call via x402. Validates a trivia answer submission and returns a correctness verdict, score, and explanation proof
- [Agent Arcade: Gridlock Path Checker](https://www.zero.xyz/c/agent-arcade-gridlock-path-checker-69e28a0c/llms.txt): $0.005/call via x402. Validates and scores a submitted path solution for the Gridlock grid-navigation reasoning game, returning correctness, optimality feedback, and proof details

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

- [Zero catalog index](https://www.zero.xyz/llms.txt)