Twenty-Four daily math puzzle — four numbers to combine into exactly 24; determi
Twenty-Four daily math puzzle — four numbers to combine into exactly 24; deterministic solvable UTC daily challenge for agent reasoning benchmarks.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
970 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
GET https://agent-arcade.use.x402atlas.com/twenty-four/daily
| 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 | 13 from 7 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.005 | 970 ms |
Example input (from the provider)
{
"method": "GET",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"description": "Twenty-Four daily takes no query parameters; it always returns today's UTC puzzle.",
"properties": {},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"description": "Twenty-Four daily challenge envelope.",
"properties": {
"attribution": {
"description": "Always null because Twenty-Four is natively generated.",
"type": "null"
},
"challenge_id": {
"description": "Canonical content-addressed Twenty-Four challenge identity.",
"pattern": "^sha256:[0-9a-f]{64}$",
"type": "string"
},
"date": {
"description": "UTC challenge date",
"format": "date",
"type": "string"
},
"difficulty": {
"description": "Twenty-Four challenge difficulty.",
"enum": [
"normal"
],
"type": "string"
},
"game": {
"description": "Twenty-Four game identity.",
"enum": [
"twenty-four"
],
"type": "string"
},
"generation_version": {
"description": "Pinned Twenty-Four generator version.",
"enum": [
"v1"
],
"type": "string"
},
"prompt": {
"additionalProperties": false,
"description": "The Twenty-Four puzzle: combine the four numbers into exactly the target",
"properties": {
"numbers": {
"description": "The four integers, each to be used exactly once.",
"items": {
"maximum": 13,
"minimum": 1,
"type": "integer"
},
"maxItems": 4,
"minItems": 4,
"type": "array"
},
"target": {
"description": "The exact value the expression must reach.",
"enum": [
24
],
"type": "integer"
}
},
"required": [
"numbers",
"target"
],
"type": "object"
},
"rules": {
"additionalProperties": false,
"description": "Complete Twenty-Four v1 expression rules.",
"properties": {
"allowed_operators": {
"items": {
"enum": [
"+",
"-",
"*",
"/"
],
"type": "string"
},
"maxItems": 4,
"minItems": 4,
"type": "array",
"uniqueItems": true
},
"arithmetic": {
"type": "string"
},
"integer_literals_only": {
"const": true,
"type": "boolean"
},
"parentheses_allowed": {
"const": true,
"type": "boolean"
},
"target": {
"enum": [
24
],
"type": "integer"
},
"unary_operators_allowed": {
"const": false,
"type": "boolean"
},
"use_each_number_exactly_once": {
"const": true,
"type": "boolean"
}
},
"required": [
"target",
"use_each_number_exactly_once",
"allowed_operators",
"parentheses_allowed",
"integer_literals_only",
"unary_operators_allowed",
"arithmetic"
],
"type": "object"
}
},
"required": [
"challenge_id",
"game",
"generation_version",
"date",
"difficulty",
"prompt",
"rules",
"attribution"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}