{"uid":"cap_ORfwRELvsz1IkDS75F38y","slug":"osf-open-source-filings-legal-case-search-ea38d984","name":"OSF Open Source Filings — Legal Case Search","description":"OSF is a live marketplace of provenance stamped public domain government and scientific data, built for autonomous agents that pay per record over x402 micropayments on Base. A paid MCP server in the official MCP Registry, discoverable on the Coinbase CDP Bazaar.","url":"https://api.osf-master-server.com/x402/legal/cases/%7Bquery%7D","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"pathParams":{"type":"object","required":["query"],"properties":{"query":{"type":"string","description":"Keyword(s): case name, party, topic, citation, or court. E.g. 'miranda arizona' or 'ninth circuit qualified immunity'."}}},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"result":"MATCHES_FOUND","matches":[{"date":"1966-06-13","source":"COURTLISTENER","citations":"384 U.S. 436","record_id":12345,"case_or_title":"Miranda v. Arizona"}],"match_count":1}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm__Uy6xY2tV89K4C46YX3uA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Search US public court case records by case name, party, topic, citation, or court, returning verified provenance-stamped legal case matches from CourtListener and other government sources.","exampleAgentPrompt":"Search Open Source Filings for court cases related to 'qualified immunity' in the Ninth Circuit and show me the matching case names, citations, and dates.","exampleUseCases":[{"title":"Landmark case citation lookup","prompt":"What's the citation for Miranda v. Arizona? Can you search OSF's legal case records and confirm the exact date and source for that ruling?"},{"title":"Topic-based case law research","prompt":"Find me court cases about qualified immunity in the Ninth Circuit — I need case names, citations, and dates for anything that comes up in OSF's verified legal database."},{"title":"Party name case search","prompt":"Search OSF for any court cases involving Roe v. Wade and give me the official citations and CourtListener record IDs so I can verify them."}],"resultDescription":"Returns a JSON object with a result status (e.g. MATCHES_FOUND), an array of matching case records each containing case/title name, date, source database (e.g. COURTLISTENER), citation string, and a numeric record ID, plus a total match count.","failureModes":["No matches found for the given query keywords — returns empty matches array","Ambiguous or overly broad query may return too many low-relevance results","Query string with special characters may need URL encoding","Payment failure via x402 micropayment will block the request before data is returned","Rate limiting or service unavailability may return a non-200 error"],"whenToPreferThis":"Choose this endpoint when you need verifiable, provenance-stamped US court case records with source attribution, especially when citation accuracy and data lineage matter. Prefer it over generic web search when you need structured legal data with a record ID for downstream verification or purchase. Best for agents that require auditable, citable legal case lookups rather than free-text legal summaries.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:44:29.474Z","isFirstParty":false}