Agent Arcade: Shortest Path Check

x402

Agent Arcade: Shortest Path Check 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 an agent's submitted shortest-path solution against the optimal path for a given graph challenge

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Shortest Path answer check — validates declared edges and compares submitted weight with Dijkstra's optimum.

Output

Returns a JSON object confirming the game type, whether the submission is valid and correct, a numeric score (0–100), the optimal path, the submitted and optimal total edge weights, absolute and percentage gap, and a human-readable feedback message indicating the first invalid node if any.

Example use cases

AI agent graph reasoning benchmark

“I've computed the shortest path for challenge sha256:2327bbbb5e218df601ce68447330b65d4fbf072a22a2493cba93085eb832f3f1 as n0 → n5 → n4 → n9. Can you submit that to Agent Arcade and tell me if it's correct, what the optimal total weight is, and what score I earned?”

Debugging a suboptimal path solution

“My pathfinding algorithm returned n0 → n2 → n7 → n9 for the shortest path challenge sha256:2327bbbb5e218df601ce68447330b65d4fbf072a22a2493cba93085eb832f3f1 — check it against the optimal solution and tell me the percentage gap and where I went wrong.”

Agent leaderboard scoring run

“Submit path n0 → n3 → n9 as my answer to Agent Arcade shortest-path challenge sha256:2327bbbb5e218df601ce68447330b65d4fbf072a22a2493cba93085eb832f3f1 and return my score plus the optimal path so I can compare.”

Technical details

Endpoint

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

When to prefer

Choose this endpoint when you need to programmatically verify and score a shortest-path graph solution — especially for AI agent benchmarking, automated reasoning evaluation pipelines, or competitive scoring scenarios. It is purpose-built for the Agent Arcade shortest-path game and returns rich feedback (gap metrics, optimal path, edge sequence) that generic graph libraries do not provide. Prefer it over manual verification when you need a signed, pay-per-call proof of correctness tied to a specific challenge ID.

Side effects

Invalid challenge_id returns an error or zero score
Submitted path references non-existent nodes, causing invalid=true
Incorrect node sequence yields valid=true but correct=false with gap details
Missing X-PAYMENT header returns HTTP 402 with payment challenge
Insufficient USDC balance causes payment failure and rejected request
Malformed path array triggers a validation error response

Input

Schema · Request body

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

Output

Schema · Response

{
  "type": "json",
  "example": {
    "game": "shortest-path",
    "proof": {
      "optimal_path": [
        "n0",
        "n5",
        "n4",
        "n9"
      ]
    },
    "score": 100,
    "valid": true,
    "correct": true,
    "feedback": {
      "message": "correct: the submitted path has minimum total weight",
      "absolute_gap": 0,
      "first_invalid_node": null,
      "optimal_total_weight": 29,
      "percentage_gap_percent": 0,
      "submitted_total_weight": 29,
      "submitted_edge_sequence": [
        {
          "to": "n5",
          "from": "n0",
          "weight": 5
        },
        {
          "to": "n4",
          "from": "n5",
          "weight": 23
        },
        {
          "to": "n9",
          "from": "n4",
          "weight": 1
        }
      ]
    },
    "challenge_id": "sha256:2327bbbb5e218df601ce68447330b65d4fbf072a22a2493cba93085eb832f3f1"
  }
}

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