OSF — Open Source Filings

● healthy data-social-apis

Provenance-stamped public-domain US government and scientific data for AI agents. SEC EDGAR, FRED, NOAA, openFDA, USGS, Crossref, and more — every record ships with a provenance URL back to its authoritative primary source. Pay-per-record x402 USDC on Base, $0.05–$0.50. Paid MCP server + listed in the official MCP Registry. No API keys, no subscriptions. ([MCP](https://api.osf-master-server.com/mcp) | [MCP Registry](https://registry.modelcontextprotocol.io/v0.1/servers?search=osf-data-marketplace) | [Bazaar health](https://api.osf-master-server.com/x402/bazaar_health))

Quality grade

How grading works

D 40.0 / 100

Availability 40.0 / 40

Endpoint responded (HTTP 200)

Payability 0.0 / 20

✗ Answers a real HTTP 402 challenge
✗ Publishes a /.well-known/x402 descriptor
✗ Payment address on record
✗ Settlement network declared
✗ Price declared

Demand 0.0 / 40

No payment address on record, so demand cannot be measured

Owner verified 0.0 / 3

Nobody has claimed this listing yet

Endpoint last checked 6 h ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -X POST https://osf-master-server.com

Listed in

Directories this entry was found in.

awesome-x402