{"service":"OSF — Open Source Filings Data Marketplace","x402_version":2,"manifest":"https://api.osf-master-server.com/.well-known/x402","mcp_endpoint":"https://api.osf-master-server.com/mcp","note":"Unpaid GET on any priced endpoint returns an HTTP 402 payment challenge. The free MCP get_catalog tool lists record ids, live per record prices, and provenance URLs for every source.","payment":{"currency":"USDC","network":"eip155:8453","pay_to":"0x72f62dE8b70d6CFa8Cc2dF6f21F243f289F3396c"},"resource_count":26,"resources":[{"endpoint":"https://api.osf-master-server.com/x402/aircraft/search/:query","method":"GET","price":"$0.05","description":"Search US civil aircraft registrations from the FAA Releasable Aircraft Database by tail number (N number), registered owner, city, state, serial number, or year of manufacture. Returns tail number, registrant, location, manufacture year, airworthiness class and a provenance URL per match. 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Full JSON plus a provenance URL to the primary source.","tags":["cve","vulnerability","exploit","security","kev","epss","cvss","threat intelligence","vulnerability management","patch management"]},{"endpoint":"https://api.osf-master-server.com/x402/buy/standard/:record_id","method":"GET","price":"$0.05","description":"One verified record per call from over 7 million provenance stamped US government and scientific records across 80 sources and 16 categories: sanctions and debarment lists, court opinions, CVEs and exploited vulnerabilities, federal contract awards, lobbying disclosures, tax exempt organizations, cl","tags":["government data","public records","sanctions","court opinions","federal spending","research papers","economic data","open data","provenance","compliance"]},{"endpoint":"https://api.osf-master-server.com/x402/buy/structured/:record_id","method":"GET","price":"$0.25","description":"One XBRL structured financial data record per call: machine readable financial statement facts from SEC EDGAR company filings, ready for quantitative analysis. Full JSON plus a provenance URL to the SEC primary source.","tags":["sec filings","xbrl","structured financial data","financial statements","fundamentals","edgar","machine readable"]},{"endpoint":"https://api.osf-master-server.com/x402/consumer/protection/:query","method":"GET","price":"$0.05","description":"Search US consumer protection data by keyword: financial complaints (CFPB), vehicle recalls (NHTSA), product safety recalls (CPSC), and FDA recall enforcement for drugs, devices, and food (openFDA, full history since 2004). 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Returns recipient or agency, dollar amount, dates, NAICS, and a provenance URL to the official source per match. For govcon market intelligenc","tags":["federal contracts","government spending","govcon awards","solicitations","grant funding"]},{"endpoint":"https://api.osf-master-server.com/x402/healthcare/records/:query","method":"GET","price":"$0.05","description":"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 to its RxCUI, check trial status, or check ","tags":["healthcare","recalls","healthcare providers","NPI registry","drugs","RxNorm","clinical trials","FDA recalls"]},{"endpoint":"https://api.osf-master-server.com/x402/identity/entity/:query","method":"GET","price":"$0.05","description":"Entity and counterparty verification by identifier or name. 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