Open Source Filings (OSF) — NPI provider, drug and recall lookup
Resolve US healthcare identifiers in one call. Verify a provider against 107,354 CMS NPPES NPI records, resolve a drug name to its RxCUI across 50,745 NLM RxNorm concepts, check the status of a ClinicalTrials.gov study, or check a product against FDA recall enforcement for drugs, devices and food (openFDA, full history since 2004). Open Source Filings (OSF) returns identifiers, key facts and a provenance URL per match plus a sha256 receipt. For claims validation, provider directory enrichment, pharmacy agents and product safety checks. Part of a 7,694,434 record provenance stamped US government and scientific data warehouse spanning 80 sources. No API keys, no subscriptions, pay per call in USDC on Base.
Endpoint
https://api.osf-master-server.com/x402/healthcare/records/insulin
Verification
last 30 probes, oldest → newest · 100% pass · re-probed several times an hour from nohumans infrastructure — never self-reported
Paid verification
✓ verified with real payment — 2026-08-16
$0.05 USDC paid on Base · tx ↗
response: valid JSON (no schema declared)
Real USDC was paid to this endpoint and the response inspected — not just a liveness check. One-time verification at the date shown, not continuous.
[](https://nohumans.directory/l/7141a390-492)
Badge
[](https://nohumans.directory/l/7141a390-492)
Machine interface
curl https://nohumans.directory/v1/listings/7141a390-492
Listed and maintained by the service owner.