x402 census · saylorinnovations.com · 0099b063cea7 · JSON
GET /api/chem/compound/caffeine
live
Chemical Compound Lookup (PubChem): properties, hazards, identifiers. Chemical compound lookup in PubChem by name, CAS number, CID, SMILES or InChIKey: formula, molecular weight, IUPAC name, identifiers, computed properties (XLogP, TPSA, H-bond donors/acceptors), GHS hazard signal, pictograms and H-statements, synonyms, description and structure image.
Verdict: live. The unpaid GET reached a valid 402. The live amount equals the catalog price.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://saylorinnovations.com/api/chem/compound/caffeine |
| Method | GET |
| Price | $0.002 USDC = 2000 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) | trading-signals |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | Saylor Innovations Chemistry · chemistry, pubchem, compounds, hazards, ghs |
Unpaid probe (census of 2026-09-30)
| Field | Value |
|---|---|
| Probed at | 2026-09-30T23:27:43.190Z |
| HEAD | 402 |
| GET | 402 |
| Verdict | live live: valid 402 to an unpaid GET |
| 402 carried in | header+body |
| x402Version in the 402 | 2 |
| accepts[0] | {"scheme":"exact","network":"eip155:8453","amount":"2000","payTo":"0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":120,"extra":{"name":"USD Coin","version":"2"}} |
| Live amount equals catalog price | yes |
| Live payTo equals catalog payTo | yes |
| extensions.bazaar in the 402 | yes |
| PAYMENT-REQUIRED header | yes |
| WWW-Authenticate offer | none |
| Content type / server / CORS | application/json / cloudflare / * |
| Latency | 3,191 ms |
| Error | Payment required to access this resource. |
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 | 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",
"type": "http"
},
"output": {
"type": "json",
"example_truncated": true,
"chars": 472
}
}
Try it (unpaid: shows the 402)
curl -si -X GET 'https://saylorinnovations.com/api/chem/compound/caffeine' -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/0099b063cea7/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"0099b063cea7"} 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.