Gridlock answer check — validates a coordinate path and measures its length agai
Gridlock answer check — validates a coordinate path and measures its length against the BFS optimum.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
655 msmedian answer time
$0.005listed price per call
$0.005price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://agent-arcade.use.x402atlas.com/gridlock/check
| Category | Everything else |
|---|---|
| Provider host | agent-arcade.use.x402atlas.com |
| Networks | eip155:137, eip155:42161, eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 4 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.005 | 655 ms |
Example input (from the provider)
{
"body": {
"answer": {
"path": [
{
"col": 0,
"row": 0
},
{
"col": 0,
"row": 1
},
{
"col": 0,
"row": 2
},
{
"col": 0,
"row": 3
},
{
"col": 0,
"row": 4
},
{
"col": 1,
"row": 4
},
{
"col": 2,
"row": 4
},
{
"col": 3,
"row": 4
},
{
"col": 3,
"row": 5
},
{
"col": 4,
"row": 5
},
{
"col": 5,
"row": 5
},
{
"col": 5,
"row": 4
},
{
"col": 6,
"row": 4
},
{
"col": 6,
"row": 3
},
{
"col": 7,
"row": 3
},
{
"col": 8,
"row": 3
},
{
"col": 8,
"row": 4
},
{
"col": 8,
"row": 5
},
{
"col": 8,
"row": 6
},
{
"col": 8,
"row": 7
},
{
"col": 8,
"row": 8
},
{
"col": 8,
"row": 9
},
{
"col": 9,
"row": 9
}
]
},
"challenge_id": "sha256:8924521ebe9c7fc3c91f1e4808c82b8258f6e4eaf158eb18b99fc5fbf7bf148f",
"date": "2026-07-01",
"difficulty": "normal",
"generation_version": "v1"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"description": "Gridlock answer-check request using the identity and coordinate path for a daily maze.",
"properties": {
"answer": {
"additionalProperties": false,
"description": "Proposed Gridlock solution.",
"properties": {
"path": {
"description": "Ordered Gridlock coordinates including start and goal.",
"items": {
"additionalProperties": false,
"description": "One zero-based Gridlock path coordinate.",
"properties": {
"col": {
"maximum": 19,
"minimum": 0,
"type": "integer"
},
"row": {
"maximum": 19,
"minimum": 0,
"type": "integer"
}
},
"required": [
"row",
"col"
],
"type": "object"
},
"maxItems": 512,
"type": "array"
}
},
"required": [
"path"
],
"type": "object"
},
"challenge_id": {
"description": "Gridlock challenge_id copied from the daily envelope.",
"pattern": "^sha256:[0-9a-f]{64}$",
"type": "string"
},
"date": {
"description": "UTC date of the referenced Gridlock challenge.",
"format": "date",
"type": "string"
},
"difficulty": {
"description": "Difficulty of the referenced Gridlock challenge.",
"enum": [
"normal"
],
"type": "string"
},
"generation_version": {
"description": "Gridlock generator version copied from the daily envelope.",
"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": {
"properties": {
"example": {
"additionalProperties": false,
"description": "Gridlock answer-check validity and optimality verdict.",
"properties": {
"challenge_id": {
"description": "Checked Gridlock challenge identity.",
"type": "string"
},
"correct": {
"description": "Whether the Gridlock path is optimal.",
"type": "boolean"
},
"feedback": {
"additionalProperties": false,
"description": "Gridlock path validity and optimality measurements.",
"properties": {
"absolute_gap": {
"type": [
"integer",
"null"
]
},
"first_invalid_step": {
"type": [
"integer",
"null"
]
},
"message": {
"type": "string"
},
"optimal_path_length": {
"type": "integer"
},
"percentage_gap_percent": {
"type": [
"number",
"null"
]
},
"submitted_path_length": {
"type": "integer"
}
},
"required": [
"message",
"first_invalid_step",
"submitted_path_length",
"optimal_path_length",
"absolute_gap",
"percentage_gap_percent"
],
"type": "object"
},
"game": {
"description": "Gridlock game identity.",
"enum": [
"gridlock"
],
"type": "string"
},
"proof": {
"additionalProperties": false,
"description": "Present only after a correct Gridlock answer.",
"properties": {
"optimal_path": {
"items": {
"additionalProperties": false,
"description": "One zero-based Gridlock path coordinate.",
"properties": {
"col": {
"maximum": 19,
"minimum": 0,
"type": "integer"
},
"row": {
"maximum": 19,
"minimum": 0,
"type": "integer"
}
},
"required": [
"row",
"col"
],