x402 census · chess402.vercel.app · a00f402dceee · JSON
POST /api/masters
unprobed
Masters opening explorer for a position. Returns top moves, win/draw/loss rates, and recent top master games from the Lichess masters database.
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://chess402.vercel.app/api/masters |
| Method | POST |
| Price | $0.003 USDC = 3000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0xfbd46201267609ad3c66bd1b99b7f1cc80b1852f |
| Seller | chess402.vercel.app |
| 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 | 1 calls and 1 unique payers in 30 days, last call 2026-09-17 (catalog-reported, not verified on chain) |
| Category (keyword rule) | other/unknown |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | none |
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 | 7 |
| Payments | 9 |
| USDC volume | $0.03 |
| Median payment | $0.003 |
| First / last payment | 2026-07-09 / 2026-09-25 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0xfbd46201267609ad3c66bd1b99b7f1cc80b1852f (contract: EIP7702StatelessDeleGator) |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {
"fen": "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
"moves": 12,
"play": "e2e4,e7e5",
"topGames": 4
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example_truncated": true,
"chars": 462
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://chess402.vercel.app/api/masters' -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/a00f402dceee/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"a00f402dceee"} 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 chess402.vercel.app.