x402 census · chess402.vercel.app · 20aca80c0fce · JSON
POST /api/cloud-eval
method-gated
Stockfish cloud evaluation for a FEN position. Returns depth, evaluation, and principal variation(s) when Lichess has the position cached.
Verdict: not verified by an unpaid GET. 405/400: the 402 sits behind the declared method. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://chess402.vercel.app/api/cloud-eval |
| Method | POST |
| Price | $0.005 USDC = 5000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0xfbd46201267609ad3c66bd1b99b7f1cc80b1852f |
| Seller | chess402.vercel.app |
| Catalogs | cdp (row updated 2026-09-08) |
| Listed since (lower bound) | 2026-09-08 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-08 |
| CDP quality counters | 3 calls and 3 unique payers in 30 days, last call 2026-09-08 (catalog-reported, not verified on chain) |
| Category (keyword rule) | finance/macro |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | none |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
Latest re-probe
| Field | Value |
|---|---|
| Re-probed at | 2026-10-01T07:13:42.000Z (cron) |
| Verdict now | method-gated changed from unprobed |
| HEAD / GET | 405 / 405 |
| accepts[0] | none |
| Live amount equals catalog price | not comparable |
| Latency | 934 ms |
| Error | none |
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",
"multiPv": 1
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example": {
"depth": 22,
"fen": "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
"knodes": 13683,
"pvs": [
{
"cp": 27,
"moves": "e2e4 c7c5 g1f3 d7d6 d2d4 c5d4"
}
]
}
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://chess402.vercel.app/api/cloud-eval' -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/20aca80c0fce/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"20aca80c0fce"} 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.