SERVICE / DETAILother
Agent Arcade: Reasoning Games
GET agent-arcade.use.x402atlas.com/chess/daily
SONAR SCORE0.603
LIVE PRICE0.005000
BAZAAR LIVEcompatible
CDP INDEXEDno
DECISION EVIDENCE
19 observations in the last 24hWhy an agent can trust this route.
HANDSHAKE SUCCESS94.7%402 challenge reachable
PAID DELIVERY0.0%settlement observed
P90 LATENCY6005msrecent response window
PRICE DRIFT0.0%advertised vs observed
Sonar evidence is advisory. Paid delivery is shown as verified only when paid probes are available; otherwise route estimates use the unpaid handshake as a clearly labeled proxy.
SONAR PROBE HISTORY / 30D
JSON ↗Observed outcomes
LIVE ENDPOINT METADATA
Chess Daily tactics puzzle — solve a deterministic UTC daily position from a pinned CC0 Lichess subset using legal UCI moves.
Resource: agent-arcade.use.x402atlas.com/chess/daily
Network: eip155:8453, eip155:137, eip155:42161 · Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 · Pay to: 0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2
Payment methods: — · Last validation: 2026-09-14 16:36:53.089+00
{
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {},
"description": "Chess Daily takes no query parameters; it always returns today's UTC tactics puzzle.",
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"challenge_id",
"game",
"generation_version",
"date",
"difficulty",
"prompt",
"rules",
"attribution"
],
"properties": {
"date": {
"type": "string",
"format": "date",
"description": "UTC Chess Daily challenge date."
},
"game": {
"enum": [
"chess"
],
"type": "string",
"description": "Chess Daily game identity."
},
"rules": {
"type": "object",
"required": [
"notation",
"complete_principal_line_required",
"maximum_moves"
],
"properties": {
"notation": {
"enum": [
"uci"
],
"type": "string"
},
"maximum_moves": {
"enum": [
16
],
"type": "integer"
},
"complete_principal_line_required": {
"type": "boolean",
"const": true
}
},
"description": "Chess Daily legal-UCI and complete-principal-line requirements.",
"additionalProperties": false
},
"prompt": {
"type": "object",
"required": [
"puzzle_id",
"fen",
"side_to_move",
"rating",
"themes",
"answer_format"
],
"properties": {
"fen": {
"type": "string",
"description": "FEN after the upstream setup move; the solver is on move"
},
"rating": {
"type": "integer",
"description": "Source puzzle rating."
},
"themes": {
"type": "array",
"items": {
"type": "string"
},
"description": "Source tactical themes."
},
"puzzle_id": {
"type": "string",
"description": "Pinned Lichess puzzle identifier."
},
"side_to_move": {
"enum": [
"white",
"black"
],
"type": "string",
"description": "Side the Chess Daily solver must play."
},
"answer_format": {
"enum": [
"uci_move_array"
],
"type": "string",
"description": "Chess Daily expects an array of UCI moves."
}
},
"description": "Chess Daily solver position and puzzle metadata.",
"additionalProperties": false
},
"difficulty": {
"enum": [
"normal"
],
"type": "string",
"description": "Chess Daily challenge difficulty."
},
"attribution": {
"type": "object",
"required": [
"source",
"license",
"snapshot_date",
"dataset_version",
"dataset_sha256"
],
"properties": {
"source": {
"type": "string",
"description": "Chess Daily puzzle source."
},
"license": {
"type": "string",
"description": "Source dataset license."
},
"snapshot_date": {
"type": "string",
"format": "date",
"description": "Pinned source snapshot date."
},
"dataset_sha256": {
"type": "string",
"pattern": "^[0-9a-f]{64}$",
"description": "SHA-256 of the packaged Chess Daily subset."
},
"dataset_version": {
"type": "string",
"description": "Pinned Chess Daily dataset version."
}
},
"description": "Chess Daily pinned dataset provenance.",
"additionalProperties": false
},
"challenge_id": {
"type": "string",
"pattern": "^sha256:[0-9a-f]{64}$",
"description": "Canonical content-addressed Chess Daily challenge identity."
},
"generation_version": {
"enum": [
"v1"
],
"type": "string",
"description": "Pinned Chess Daily dataset-selection version."
}
},
"description": "Chess Daily tactics challenge envelope.",
"additionalProperties": false
}
}
},
"paymentRequirements": [
{
"raw": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"scheme": "exact",
"network": "eip155:8453",
"amountAtomic": "5000"
},
{
"raw": {
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"scheme": "exact",
"network": "eip155:137",
"amountAtomic": "5000"
},
{
"raw": {
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"extra": {
"name": "USD Coin",
"tier": "standard",
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"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"scheme": "exact",
"network": "eip155:42161",
"amountAtomic": "5000"
}
]
}METADATA PROVENANCE
Source catalog records are retained separately from live endpoint observations. Sonar score, uptime, and latency are advisory metrics. CDP indexing is not inferred from validation.