Agent Arcade: Reasoning Games
Gridlock answer check — validates a coordinate path and measures its length against the BFS optimum.
InferenceLiveeip155:8453Exactvia cdp
GridlockGrid-pathMazePathfindingLogic-puzzle
Calls · 30d
2↓ 7.4%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$24.62
Verified settled volume
1,043 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-15 06:32Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x8C12…Df1b2. The signed payment is good for 5 minutes.
- Paid to
- 0x8C12…Df1b2
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
5000units
on Polygon · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x8C12…Df1b2
- Token contract
- 0x3c49…c3359
- Payment window
- 5 minutes
5000units
on Arbitrum · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x8C12…Df1b2
- Token contract
- 0xaf88…e5831
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"date": "2026-07-01",
"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
}
]
},
"difficulty": "normal",
"challenge_id": "sha256:8924521ebe9c7fc3c91f1e4808c82b8258f6e4eaf158eb18b99fc5fbf7bf148f",
"generation_version": "v1"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"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"
}
}
},
"tags": [
"gridlock",
"grid-path",
"maze",
"pathfinding",
"logic-puzzle",
"agent-game",
"answer-check"
],
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"challenge_id",
"generation_version",
"date",
"difficulty",
"answer"
],
"properties": {
"date": {
"type": "string",
"format": "date",
"description": "UTC date of the referenced Gridlock challenge."
},
"answer": {
"type": "object",
"required": [
"path"
],
"properties": {
"path": {
"type": "array",
"items": {
"type": "object",
"required": [
"row",
"col"
],
"properties": {
"col": {
"type": "integer",
"maximum": 19,
"minimum": 0
},
"row": {
"type": "integer",
"maximum": 19,
"minimum": 0
}
},
"description": "One zero-based Gridlock path coordinate.",
"additionalProperties": false
},
"maxItems": 512,
"description": "Ordered Gridlock coordinates including start and goal."
}
},
"description": "Proposed Gridlock solution.",
"additionalProperties": false
},
"difficulty": {
"enum": [
"normal"
],
"type": "string",
"description": "Difficulty of the referenced Gridlock challenge."
},
"challenge_id": {
"type": "string",
"pattern": "^sha256:[0-9a-f]{64}$",
"description": "Gridlock challenge_id copied from the daily envelope."
},
"generation_version": {
"enum": [
"v1"
],
"type": "string",
"description": "Gridlock generator version copied from the daily envelope."
}
},
"description": "Gridlock answer-check request using the identity and coordinate path for a daily maze.",
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"challenge_id",
"game",
"valid",
"correct",
"score",
"feedback"
],
"properties": {
"game": {
"enum": [
"gridlock"
],
"type": "string",
"description": "Gridlock game identity."
},
"proof": {
"type": "object",
"required": [
"optimal_path"
],
"properties": {
"optimal_path": {
"type": "array",
"items": {
"type": "object",
"required": [
"row",
"col"
],
"properties": {
"col": {
"type": "integer",
"maximum": 19,
"minimum": 0
},
"row": {
"type": "integer",
"maximum": 19,
"minimum": 0
}
},
"description": "One zero-based Gridlock path coordinate.",
"additionalProperties": false
}
}
},
"description": "Present only after a correct Gridlock answer.",
"additionalProperties": false
},
"score": {
"type": "integer",
"description": "Informational Gridlock score: 100 when correct, otherwise 0."
},
"valid": {
"type": "boolean",
"description": "Whether the Gridlock path follows the movement rules."
},
"correct": {
"type": "boolean",
"description": "Whether the Gridlock path is optimal."
},
"feedback": {
"type": "object",
"required": [
"message",
"first_invalid_step",
"submitted_path_length",
"optimal_path_length",
"absolute_gap",
"percentage_gap_percent"
],
"properties": {
"message": {
"type": "string"
},
"absolute_gap": {
"type": [
"integer",
"null"
]
},
"first_invalid_step": {
"type": [
"integer",
"null"
]
},
"optimal_path_length": {
"type": "integer"
},
"submitted_path_length": {
"type": "integer"
},
"percentage_gap_percent": {
"type": [
"number",
"null"
]
}
},
"description": "Gridlock path validity and optimality measurements.",
"additionalProperties": false
},
"challenge_id": {
"type": "string",
"description": "Checked Gridlock challenge identity."
}
},
"description": "Gridlock answer-check validity and optimality verdict.",
"additionalProperties": false
}
}
}
}
},
"category": "games"
}
}Provenance
- Seen in the source catalog
- 2026-09-15 06:32Z
- Last indexed by Roundhouse
- 2026-09-26 18:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-13 00:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 405
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Agent Arcade: Reasoning Games and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Agent%20Arcade%3A%20Reasoning%20Games' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://agent-arcade.use.x402atlas.com/gridlock/check, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.