api.osf-master-server.com
| Availability (valid 402 returned) | 100.0% of 160 probes |
| Median 402 handshake | 606ms |
| p90 handshake | 637ms |
| Catalog price (advertised) | $0.08 |
| Live price (median demanded) | $0.05 |
| Price status | dynamic |
| Protocol | x402 v2 |
| Category (our classification) | data-intel |
| Payment receiver | 0x051A…Af85 (+1 more) · changed 1× since Jul 12 |
| Base USDC settlement to this receiver wallet (30d' measured by us) | x402-plausible (amount matches a listed price): $9 · 180 transfers · 16 distinct senders. All USDC inflow' upper bound incl. non-x402: $11 · 208 transfers. |
| Second vantage | confirmed 402 from a second network path (Cloudflare edge), 2h ago |
| Discovery (.well-known/x402) | present |
| Catalog volume (their metric) | 0 calls/30d |
listed products (catalog path · advertised price · live price we measured)
| /x402/buy/annual/record_id | $0.3 | $0.3 |
| /x402/cyber/threats/query | $0.05 | $0.05 |
| /x402/environment/data/query | $0.05 | $0.05 |
| /x402/research/papers/query | $0.05 | $0.05 |
| /x402/sec/filings/query | $0.05 | $0.05 |
| /x402/broker/check/query | $0.08 | not yet probed |
| /x402/buy/security/record_id | $0.04 | not yet probed |
| /x402/buy/standard/record_id | $0.05 | not yet probed |
| /x402/consumer/protection/query | $0.05 | not yet probed |
| /x402/economic/indicators/query | $0.05 | not yet probed |
and 7 more listed paths
grade evidence: hourly probes of /x402/healthcare/records/query. Availability, latency and protocol measure the operator's shared infrastructure and generalize across its products; the price check applies to the probed product. We now also probe one other product per hour, rotating; "live price we measured" shows what each answered.
event log (from our catalog snapshots and probes)
| 20260720 16:34 | payment receiver changed to 0x051A…Af85, 0x72f6…396c |
| 2026-07-21 05:10 | price changed $0.05 → $0.08 |
| 2026-07-19 05:18 | price changed $0.01 → $0.05 |
| 2026-07-18 23:24 | price changed $0.08 → $0.01 |
| 2026-07-17 07:37 | price changed $0.05 → $0.08 |
| 2026-07-14 17:35 | price changed $0.02 → $0.05 |
| 2026-07-13 17:16 | price changed $0.05 → $0.02 |
Search US healthcare data by keyword: CMS NPPES NPI provider records, NLM RxNorm drug concepts, ClinicalTrials.gov studies, and FDA recall enforcement for drugs, devices, and food (openFDA, full history since 2004). Verify a provider or NPI, resolve a drug …
dynamic-pricingreceiver-changed
<a href="https://x402register.com/s/api.osf-master-server.com.html"><img src="https://x402register.com/badge/api.osf-master-server.com.svg" alt="x402 register grade B"></a>
What this grade does and doesn't measure: it scores the paid-request handshake — whether the service returns a spec-valid 402 payment challenge, how fast, and whether its price is honest. We do not pay these endpoints yet, so we do not verify that the paid response returns correct or complete content. Availability is a probe success rate measured hourly, corroborated by a second network path for this service.
Operator of api.osf-master-server.com? Dispute this rating. Scores are opinions based on automated measurements at the stated times.