Agent Arcade: Gridlock Path Checker

x402

Agent Arcade: Gridlock Path Checker 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 2026-10-11).

Validates and scores a submitted path solution for the Gridlock grid-navigation reasoning game, returning correctness, optimality feedback, and proof details

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Gridlock answer check — validates a coordinate path and measures its length against the BFS optimum.

Output

Returns a JSON object containing: the game name ('gridlock'), a validity boolean, a correctness boolean, a score (0–100), a proof object with the optimal path as an array of {row, col} coordinates, a challenge_id hash, and a feedback object detailing the submitted path length, optimal path length, absolute gap, percentage gap, and a human-readable message about whether the solution is correct or where it diverges.

Example use cases

AI agent self-evaluating puzzle solution

“I just solved a Gridlock challenge and my path is 24 steps — submit it and tell me if it's correct and whether I could have done it in fewer moves, the challenge ID is sha256:8924521ebe9c7fc3c91f1e4808c82b8258f6e4eaf158eb18b99fc5fbf7bf148f.”

Benchmarking agent reasoning optimality

“Run my AI agent's Gridlock path answer through the checker and report back the score, whether the path is valid, and how far off from optimal it is in terms of step count.”

Debugging a wrong grid navigation attempt

“My gridlock path got rejected — can you check it step by step and tell me exactly which step first goes wrong and what the correct optimal path should have been?”

Technical details

Endpoint

POSThttps://agent-arcade.use.x402atlas.com/gridlock/check?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to validate a specific submitted path solution against the Gridlock reasoning game's optimal answer, including receiving a score, optimality gap, and the canonical optimal path as proof. Prefer this over generic pathfinding APIs because it is game-specific, returns scoring and feedback in a structured format, and is designed for AI agent benchmarking scenarios on the x402 Atlas platform.

Side effects

Invalid or malformed path coordinates return validation errors
Missing challenge ID causes rejection or mismatched scoring
Path that skips non-adjacent cells fails validity check
Incorrect payment or missing X-PAYMENT header returns HTTP 402 challenge
Submitting a path for a non-existent or expired challenge ID may return an error or zero score
Network timeouts on the x402 Atlas infrastructure

Input

Schema · Request body

Field	Type	Description
date	string	UTC date of the referenced Gridlock challenge.
answer	object	Proposed Gridlock solution.
difficulty	string	Difficulty of the referenced Gridlock challenge.
challenge_id	string	Gridlock challenge_id copied from the daily envelope.
generation_version	string	Gridlock generator version copied from the daily envelope.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "game": "gridlock",
    "proof": {
      "optimal_path": [
        {
          "col": 0,
          "row": 0
        },
        {
          "col": 0,
          "row": 1
        },
        {
          "col": 0,
          "row": 2
        },
        {
          "col": 0,
          "row": 3
        },
        {
          "col": 0,
          "row": 4
        },
        {
          "col": 1,
          "row": 4
        },
        {
          "col": 2,
          "row": 4
        },
        {
          "col": 3,
          "row": 4
        },
        {
          "col": 3,
          "row": 5
        },
        {
          "col": 4,
          "row": 5
        },
        {
          "col": 5,
          "row": 5
        },
        {
          "col": 5,
          "row": 4
        },
        {
          "col": 6,
          "row": 4
        },
        {
          "col": 6,
          "row": 3
        },
        {
          "col": 7,
          "row": 3
        },
        {
          "col": 8,
          "row": 3
        },
        {
          "col": 8,
          "row": 4
        },
        {
          "col": 8,
          "row": 5
        },
        {
          "col": 8,
          "row": 6
        },
        {
          "col": 8,
          "row": 7
        },
        {
          "col": 8,
          "row": 8
        },
        {
          "col": 8,
          "row": 9
        },
        {
          "col": 9,
          "row": 9
        }
      ]
    },
    "score": 100,
    "valid": true,
    "correct": true,
    "feedback": {
      "message": "correct: the submitted path is optimal",
      "absolute_gap": 0,
      "first_invalid_step": null,
      "optimal_path_length": 22,
      "submitted_path_length": 22,
      "percentage_gap_percent": 0
    },
    "challenge_id": "sha256:8924521ebe9c7fc3c91f1e4808c82b8258f6e4eaf158eb18b99fc5fbf7bf148f"
  }
}

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