x402 census · x402.agentutility.ai · bb369758e80b · JSON
POST /ability-check
unprobed
Resolves a d20 ability check, skill check, attack roll, or saving throw for tabletop RPGs. Rolls a d20 with an optional modifier and advantage/disadvantage, compares to a DC, and reports total, success/failure, and natural-20 / natural-1. Seedable. Use it as a d20 check resolver API for any RPG.
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://x402.agentutility.ai/ability-check |
| Method | POST |
| Price | $0.005 USDC = 5000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base); also accepts solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| payTo | 0x6c0752c09e7F6fA6526fCDf40e456a159ebB5621 |
| Seller | x402.agentutility.ai |
| Catalogs | cdp (row updated 2026-09-17) |
| Listed since (lower bound) | 2026-09-17 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-17 |
| CDP quality counters | 2 calls and 1 unique payers in 30 days, last call 2026-09-17 (catalog-reported, not verified on chain) |
| Category (keyword rule) | agent-services |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | AgentUtility.ai · ability |
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 | 114 |
| Payments | 1,728 |
| USDC volume | $15.93 |
| Median payment | $0.01 |
| First / last payment | 2026-06-09 / 2026-09-20 |
| Sampler-shaped share of payments | 99.9% |
| Payers that are not samplers | 1 |
| Source | forensics-2026-09-30 |
| Address | 0x6c0752c09e7F6fA6526fCDf40e456a159ebB5621 |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {
"advantage": true,
"dc": 15,
"modifier": 5,
"seed": 2
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example": {
"critical_failure": false,
"critical_success": false,
"d20_rolls": [
15,
7
],
"dc": 15,
"mode": "advantage",
"modifier": 5,
"natural_roll": 15,
"success": true,
"total": 20
}
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://x402.agentutility.ai/ability-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/bb369758e80b/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"bb369758e80b"} 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 x402.agentutility.ai.