Search legal databases

BOE Open Data

FreeSpain

Official open-data API of Spain's Boletín Oficial del Estado (BOE), the national gazette agency: consolidated national legislation (acts, decrees, with ELI identifiers and article-level text), Tribunal Constitucional rulings (resolved by case number, with ECLI citations), and binding administrative doctrine from the tax authority (DGT rulings), the Central Economic-Administrative Tribunal (TEAC criterios), and the data-protection authority (AEPD resolutions). Access is free and keyless directly from BOE's own API; an open-source MCP connector (es-eli-mcp) exposes it to Claude and other MCP clients with dedicated tools per source — consolidated-text retrieval for legislation, citation lookup for Tribunal Constitucional rulings, and full-text/date search for DGT and AEPD. It's an early-stage, single-maintainer project: TEAC search doesn't yet support text filtering, and BOE's own keyword search endpoint isn't currently reliable through this connector — legislation lookups work best by known identifier (ELI/BOE id) rather than full-text search for now.

legislationcase_lawdoctrine

CourtListener

FreeUnited States

Free access to millions of legal opinions from federal and state courts, plus oral argument recordings, judge biographical data, and the RECAP Archive of federal court filings — maintained by the nonprofit Free Law Project, covering over 99% of published precedential U.S. case law from 2,000+ courts.

case_law8,313,056 documents

Enndor

FreeColombia

AI legal assistant for Colombian law, letting lawyers search case law from the Constitutional Court, Supreme Court, Council of State, the Superintendence of Industry and Commerce (SIC), and Andean Community rulings, alongside Colombian laws, decrees and codes — with every answer linked back to its source document. Also drafts tutelas, commercial contracts and demandas, and can analyze uploaded case files for contractual risk. Available as a free MCP connector for Claude and ChatGPT — sign in once and search, draft, or analyze directly from the chat. Rebranded from LegisIA to Enndor in 2026. No public REST API.

case_lawlegislation

EUR-Lex

FreeEuropean Union

The European Union's official legal database, covering regulations, directives, decisions and treaties currently in force across all 27 member states, plus judgments, orders and Advocate General opinions from the Court of Justice and the General Court. Documents are tagged with the EuroVoc subject thesaurus and cross-linked by amendment, repeal, legal-basis and citing-case relationships, so a search can follow a provision or ruling forward and backward through the whole body of EU law. Full text and metadata are free to reuse (metadata is public domain under CC0; documents under Commission Decision 2011/833/EU, with source attribution). Access the web interface directly at eur-lex.europa.eu, or connect an MCP client (Claude, Cursor, and others) to the eur-lex-mcp-server connector — no API key needed — to search legislation and case law, resolve CELEX/ELI/ECLI citations, retrieve full document or judgment text, and trace a provision's amendment and citation history programmatically. A separate SOAP search service is also available directly from EUR-Lex for registered users who want search without going through an MCP client, though it returns metadata only, not document text. Keyword search covers titles and CELEX numbers rather than full document bodies — once you have an identifier from a search, the document/case-retrieval tools return the complete text.

legislationcase_law

Judilibre

FreeFrance

Open-data API for decisions of the Cour de cassation, published by the court itself: pseudonymized full text, structured metadata (chamber, formation, jurisdiction, matter/theme, solution type, publication level), full-text search with highlighting, and a taxonomy endpoint for discovering valid filter values. 8 REST endpoints. Published under the Licence Ouverte v2.0; API access requires OAuth2 client credentials via the PISTE portal (separate application from Légifrance's).

case_law

LawDiver

FreeUnited States

Free U.S. primary-law database covering 10,000,000+ court opinions — the U.S. Supreme Court, all federal circuit and district courts, and the appellate and supreme courts of all 50 states and D.C. — plus 60,000 current U.S. Code sections, over 1.9 million state-statute sections across all 50 states and D.C., 1,300+ U.S. treaties, and 8,000+ pattern jury instructions. Positions itself as a free alternative to Westlaw/Lexis for primary law specifically; it does not include secondary materials like treatises or practice guides. Its standout feature is GoodLaw, a citator built over a citation graph of about 100 million resolved opinion-to-opinion edges (190 million in-text citations) that flags whether a case has been overruled, vacated, or questioned — the kind of good-law check that distinguishes it from a pure full-text case search. A companion CiteCheck tool verifies one citation or a whole uploaded brief (up to 50 citations at once) against the corpus, flags unsupported or miscited authorities, and suggests corrected Bluebook form. Separate modules add administrative-law material beyond ordinary case law: IRS guidance (~59,000 authorities, each with its own good-law status), immigration decisions (~180,000 BIA/AAO/OCAHO authorities, plus a visa-bulletin lookup), and trademark records (3.2 million+ USPTO applications, ~64,000 TTAB proceedings, TMEP/TBMP). Tax Court, Board of Tax Appeals, and TTAB *opinions* specifically are already counted in the 10,000,000+ court-opinion figure above, not additional to it — only the administrative-authority and application records in these modules are extra. Web search requires no account or login. The REST API and MCP connectors (separate endpoints for caselaw, tax, trademark, and immigration) need a free API key. Caselaw and tax connectors are listed directly in Claude's and ChatGPT's own connector directories; trademark and immigration connect via a custom MCP URL or a Custom GPT Action. Also works with Cursor, Claude Code, and Perplexity. Everything — search, API, MCP, and CiteCheck — is free during the company's current rollout; bulk data licensing (full corpus, citation graph, embeddings) is offered separately for teams building their own products on top of it.

legislationcase_law11,960,000 documents

Légifrance

FreeFrance

Official French legal database: codes, laws, decrees and ordinances (fonds LEGI/CODE), case law from the Cour de cassation and administrative courts (fonds JURI), collective labour agreements (fonds KALI), and the Journal Officiel (fonds JORF) — 68 REST endpoints across search/consult/list. Published by DILA under the Licence Ouverte v2.0 — the underlying data is free; API access requires OAuth2 client credentials via the PISTE portal.

legislationcase_law

OpenCaseLaw

FreeSwitzerland

Swiss jurisprudence and legislation, rebuilt nightly by re-scraping official court and government sources. - 1,080,540 court decisions. The Federal Supreme Court, every federal court, and all 26 cantons, 1875–2026, in German, French and Italian. - 21,153 laws, both federal and cantonal. - 45,607 commentaries and scholarly publications.

legislationcase_lawdoctrine1,147,300 documents

Open Data van de Rechtspraak

FreeNetherlands

The Dutch judiciary's own open-data program for case law: ECLI-indexed decisions from every Dutch court, searchable by court, legal area, document type, and date, with over 800,000 full, pseudonymized rulings currently published (a larger index exists, but most older entries carry only case metadata rather than full text). Access runs through the official Open Data feed plus the LiDO citation graph, which links each decision to the cases, statutes, and literature it cites. Available today via the open-source rechtspraak-mcp server (no API key) for Claude and other MCP clients — tools cover faceted search, full-text retrieval by ECLI (single or batch), a filter catalog of valid courts and legal areas, and LiDO-based related-case lookup. Every result links back to the official rechtspraak.nl page and the stable deeplink.rechtspraak.nl citation URL.

case_law800,000 documents

RIS — Rechtsinformationssystem

FreeAustria

Austria's official federal legal database, accessed through the RIS Open Government Data API — public and keyless, no registration required. Covers consolidated federal legislation (Bundesrecht) and legislation from all nine Austrian provinces (Landesrecht), plus case law from the Constitutional Court (Verfassungsgerichtshof), the Administrative Supreme Court (Verwaltungsgerichtshof), and the ordinary courts, across 11 court types. An MCP server (ris-mcp-ts) exposes 13 tools for Claude and other MCP clients: full-text statute retrieval by RIS document number, keyword/paragraph/date search across federal and state law, and case-law lookup that can return either a decision's headnote (Rechtssatz) or its full text (Entscheidungstext). It also reaches gazettes, government bills, and municipal law. Public access is rate-limited to roughly one request every two seconds, which is fine for normal research queries; bulk retrieval is restricted to off-peak hours and requires notifying the RIS operator in advance.

legislationcase_law

SAOS (System Analizy Orzeczeń Sądowych)

FreePoland

Free, keyless REST API for Polish court judgments, built by ICM UW (University of Warsaw) and partners under an NCBR research grant. Covers rulings from the common courts' own publication portal, the Supreme Court, the Constitutional Tribunal, and the National Appeals Chamber (KIO) — search by keyword, court, judge, legal basis, and date range, with case numbers, panel composition, and a matched-phrase excerpt in results; full judgment text is a follow-up lookup by ID. An MCP server (mcp-saos) exposes the same search, judgment-lookup, and case-number tools, plus a citator that flags whether a judgment is still good law by scanning later citing decisions for overruling language — usable from Claude or any MCP-compatible client with no sign-up. Note: the API's data model has a field for administrative-court rulings, but SAOS's own sourcing description names only common courts, the Supreme Court, the Constitutional Tribunal, and KIO — administrative-court (NSA/WSA) coverage should be treated as unconfirmed rather than assumed comprehensive.

case_law

UK Legal MCP

FreeUnited Kingdom

Combines two official UK government open-data sources into a single MCP connector: legislation.gov.uk's consolidated Acts of Parliament and Statutory Instruments (Open Government Licence v3.0), and The National Archives' Find Case Law service — judgments from the High Court, Court of Appeal, Supreme Court, Privy Council, and employment/first-tier tribunals, covering England and Wales primarily plus UK-wide Supreme Court and Privy Council decisions, from the early 2000s onward (Open Justice Licence). Search tools return actual judgment text, with keyword grep within full opinions rather than just case metadata, alongside full-text legislation search. Built and maintained as an independent open-source project — not affiliated with HM Government, The National Archives, or Parliament — and actively updated. No API key required for the legal-research tools. Connects to Claude, ChatGPT, Cursor, and VS Code via a hosted MCP endpoint; separate modules also cover Hansard debates, Parliamentary bills/votes/committees, and HMRC guidance beyond the core legal-database scope.

legislationcase_law

Search legal databases · ThomasMore AI