# Open Source Filings (OSF)

> Pay per record marketplace of provenance stamped US government and scientific data for autonomous AI agents. 4.8 million+ records across 76 sources and 15 categories. Payment: x402 protocol v2, USDC on Base mainnet (eip155:8453). No API keys, no accounts, no subscriptions. Every record links back to its authoritative primary source.

## Paid x402 endpoints (GET, price per call)

- [Sanctions Screening](https://api.osf-master-server.com/x402/screen/sanctions/{name}): $0.08. Screen a person or company name against 11 authorities: US OFAC SDN, OFAC Consolidated, EU Consolidated, UK OFSI, UN Security Council, Trade.gov CSL, FBI Most Wanted, World Bank debarments, HHS OIG healthcare exclusions, SAM.gov federal exclusions, and Federal Reserve Board enforcement actions. 280,000+ screened parties. Returns match details with provenance URLs and a hashed audit receipt. A match is a screening signal, not a determination.
- [CVE Exploit Check](https://api.osf-master-server.com/x402/security/cve/{cve_id}): $0.08. Whether a CVE is actively exploited in the wild (US CISA KEV catalog), its EPSS exploit probability score, and its CVSS severity, each with a provenance URL, plus a hashed audit receipt.
- [Entity Lookup](https://api.osf-master-server.com/x402/identity/entity/{query}): $0.01. Verify an entity by identifier or name against US CMS NPI, GLEIF LEI, FDIC, and SEC EDGAR. Pass an NPI, LEI, FDIC cert, or CIK for an exact match, or a name for candidates.
- [Legal Case Search](https://api.osf-master-server.com/x402/legal/cases/{query}): $0.05. 1.5 million+ US court opinions: SCOTUS all time, all 13 federal appellate circuits with verifiable citations, plus SEC litigation releases and administrative proceedings.
- [Securities Search](https://api.osf-master-server.com/x402/sec/filings/{query}): $0.05. SEC EDGAR filings, company facts, full text filing search, and enforcement records.
- [Research Paper Search](https://api.osf-master-server.com/x402/research/papers/{query}): $0.05. 1.2 million+ scholarly works: arXiv (700,000+ preprints, 2024 to 2026), PubMed, Crossref, Semantic Scholar, OpenAlex, ClinicalTrials.
- [Cyber Threat Search](https://api.osf-master-server.com/x402/cyber/threats/{query}): $0.05. CVE Program records, NVD, ENISA EUVD, CISA advisories including 3,900+ ICS advisories, MITRE ATT&CK, GitHub security advisories.
- [Healthcare Search](https://api.osf-master-server.com/x402/healthcare/records/{query}): $0.05. CMS NPI provider registry, openFDA drug, device and food recall enforcement with full history since 2004, RxNorm, clinical trials.
- [Regulations Search](https://api.osf-master-server.com/x402/regulations/law/{query}): $0.05. Federal Register, eCFR, GovInfo, Congress.gov, and federal court opinions.
- [Government Spending Search](https://api.osf-master-server.com/x402/gov/spending/{query}): $0.05. USAspending federal awards and contracts, grants, and campaign finance records.
- [Economic Indicator Search](https://api.osf-master-server.com/x402/economic/indicators/{query}): $0.05. FRED, US Treasury fiscal data, EIA energy, Census, World Bank indicators.
- [Consumer Protection Search](https://api.osf-master-server.com/x402/consumer/protection/{query}): $0.05. Product recalls and consumer safety records including openFDA recall enforcement and NHTSA vehicle safety recalls.
- [Environment Search](https://api.osf-master-server.com/x402/environment/data/{query}): $0.05. NOAA weather and alerts, USGS earthquakes and water, EPA facility compliance, FEMA disaster declarations.

## Catalog and bulk access

- [MCP server](https://api.osf-master-server.com/mcp): 15 tools. get_catalog (free) lists all sources, categories, and live per record prices; search tools mirror the paid routes above; get_record (paid) purchases any individual record by id. MCP Registry name: io.github.onefreeman1337/osf-data-marketplace.
- [Documentation](https://github.com/onefreeman1337/osf-data-marketplace): connect instructions, tool list with prices, and x402 payment guide.
- [x402 discovery manifest](https://api.osf-master-server.com/.well-known/x402): machine readable catalog of every paid resource with live prices.
- [OpenAPI spec](https://api.osf-master-server.com/openapi.json): machine readable spec for the paid HTTP routes.

## Payment details

- Protocol: x402 v2. Challenge arrives in the payment required header of a 402 response with an empty body; standard x402 client libraries handle payment automatically.
- Asset: USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base mainnet (eip155:8453).
- Receiving address: 0x72f62dE8b70d6CFa8Cc2dF6f21F243f289F3396c. Facilitator: Coinbase CDP.

## Notes for agents

- Screening and registry results are decision support signals with provenance, not legal determinations. Confirm against the linked official source before acting.
- Directory listings: CDP Bazaar, x402scan, 402 Index (domain verified), MCP Registry.