x402 census · agent-arcade.use.x402atlas.com · 97a95fa3f6dc · JSON

POST /twenty-four/check

unprobed

Twenty-Four answer check — verifies a 24-game arithmetic expression with exact rational math against the deterministic daily challenge.

Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.

Facts from the catalogs

Field Value

URL https://agent-arcade.use.x402atlas.com/twenty-four/check

Method POST

Price $0.005 USDC = 5000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base); also accepts eip155:137, eip155:42161

payTo 0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2

Seller agent-arcade.use.x402atlas.com

Catalogs cdp (row updated 2026-09-15)

Listed since (lower bound) 2026-09-15 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-15

CDP quality counters 3 calls and 2 unique payers in 30 days, last call 2026-09-15 (catalog-reported, not verified on chain)

Category (keyword rule) games/fun

Templated path no

x402Version in catalog 2

Service name / tags Agent Arcade: Reasoning Games · twenty-four, 24-game, math-puzzle, arithmetic, reasoning

Unpaid probe (census of )

Field

Value

Probe

not probed in this build

No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.

On-chain facts for the payTo (public address)

Field Value

Distinct payers 12

Payments 46

USDC volume $0.47

Median payment $0.005

First / last payment 2026-07-27 / 2026-09-29

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "answer": "12*((9-13)+6)",
   "challenge_id": "sha256:91ea634735ae4ff57c83ef8f3f08fdecf0b146d41582264bdcbb64b560f36cce",
   "date": "2026-07-01",
   "difficulty": "normal",
   "generation_version": "v1"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "challenge_id": "sha256:91ea634735ae4ff57c83ef8f3f08fdecf0b146d41582264bdcbb64b560f36cce",
   "correct": true,
   "feedback": {
    "message": "correct: the expression evaluates to exactly 24",
    "numbers_used": [
     12,
     9,
     13,
     6
    ]
   },
   "game": "twenty-four",
   "proof": {
    "exact_value": "24",
    "normalized_expression": "(12 * ((9 - 13) + 6))",
    "numbers_used": [
     12,
     9,
     13,
     6
    ]
   },
   "score": 100,
   "valid": true
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://agent-arcade.use.x402atlas.com/twenty-four/check' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'

The catalog declares POST. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.

Paid checks (x402, USDC on Base)

GET https://bazaar.agentexchange.work/r/97a95fa3f6dc/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"97a95fa3f6dc"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.

Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on agent-arcade.use.x402atlas.com.