x402 census · saylorinnovations.com · f42b0413b54a · JSON
GET /api/nobel/laureates
gone
Nobel Prize Laureates (by name, year, category). Nobel Prize laureates by name, year or category (physics, chemistry, medicine, literature, peace, economics): birth and death, prizes, motivation, share and affiliations.
Verdict: dead listing. 404/410: gone.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://saylorinnovations.com/api/nobel/laureates |
| Method | GET |
| Price | $0.001 USDC = 1000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base); also accepts solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp, eip155:137, eip155:42161 |
| payTo | 0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa |
| Seller | saylorinnovations.com |
| Catalogs | cdp (row updated 2026-09-25), payai (row updated 2026-09-29) |
| Listed since (lower bound) | 2026-09-25 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-29 |
| CDP quality counters | 2 calls and 1 unique payers in 30 days, last call 2026-09-25 (catalog-reported, not verified on chain) |
| Category (keyword rule) | other/unknown |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | · nobel, laureates |
Unpaid probe (census of 2026-09-30)
| Field | Value |
|---|---|
| Probed at | 2026-09-30T23:42:58.900Z |
| HEAD | 404 |
| GET | 404 |
| Verdict | gone 404/410: gone |
| 402 carried in | n/a |
| x402Version in the 402 | n/a |
| accepts[0] | none |
| Live amount equals catalog price | not comparable |
| Live payTo equals catalog payTo | not comparable |
| extensions.bazaar in the 402 | no |
| PAYMENT-REQUIRED header | no |
| WWW-Authenticate offer | none |
| Content type / server / CORS | text/html / cloudflare / none |
| Latency | 1,605 ms |
| Error | none |
Latest re-probe
| Field | Value |
|---|---|
| Re-probed at | 2026-10-01T07:13:42.000Z (cron) |
| Verdict now | gone unchanged |
| HEAD / GET | 404 / 404 |
| accepts[0] | none |
| Live amount equals catalog price | not comparable |
| Latency | 744 ms |
| Error | none |
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 2 |
| Payments | 6 |
| USDC volume | $0.02 |
| Median payment | $0.0025 |
| First / last payment | 2026-09-27 / 2026-09-29 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa |
Declared input and output (extensions.bazaar)
{
"input": {
"method": "GET",
"queryParams": {
"name": "curie"
},
"type": "http"
},
"output": {
"type": "json",
"example": {
"count": 1,
"laureates": [
{
"born": "1867-11-07",
"name": "Marie Curie",
"prizes": [
{
"category": "Physics",
"motivation": "in recognition of the extraordinary services they have rendered...",
"year": 1903
}
]
}
]
}
}
}
Try it (unpaid: shows the 402)
curl -si -X GET 'https://saylorinnovations.com/api/nobel/laureates' -H 'accept: application/json'
The catalog declares GET. 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/f42b0413b54a/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"f42b0413b54a"} 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: PayAI listing status · agentic.market (CDP Bazaar front end) · this record as JSON · all resources on saylorinnovations.com.