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

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

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

Midpage

Paid, free trial availableUnited States

AI-powered U.S. legal research and drafting platform with full case law coverage — all federal appellate and district courts (including unpublished opinions), all 50 states, and D.C., plus select state trial court data. 16,000,000+ opinions tracked, new cases appearing within hours of publication. Also covers federal and state statutes, regulations, and agency guidance. An AI-powered citator classifies citing cases as Negative, Caution, or Neutral with plain-language explanations rather than just symbols. Proposition Search finds case language matching a specific legal argument, with an Add Column feature to refine results by asking follow-up questions against them. Also supports brief drafting, cite-checking, and on-demand PACER docket retrieval for federal cases — docket sheets, procedural history, counsel information, and filings — with every AI response hyperlinked to the underlying case. Professional plan is $100/month (unlimited AI research, no API access), Law Student plan $25/month with proof of current enrollment; both start with a 2-week free trial, no sales call required. API access for developers is a separate, unpublished-price track.

legislationcase_law16,000,000 documents

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

OpenLaws

PaidUnited States

U.S. federal and state legislation, structured and kept current across all 50 states, D.C., and Puerto Rico. 100% coverage of the U.S. Code and Code of Federal Regulations. 100% coverage of state statutes and codes. 99% coverage of state regulations and administrative codes. 4,554,349 sections of statutes, regulations, and constitutions tracked and regularly updated, drawn from 163 authoritative government sources.

legislation

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

Trifolia

FreemiumChile

Chilean legal AI covering case law (Supreme Court, Courts of Appeals, and civil/labor/family/criminal courts, via the Poder Judicial's jurisprudence search), legislation (LeyChile, including repealed norms), and doctrine (law-school and SciELO Chile sources) — plus administrative opinions from Contraloría, SII, CMF, the Competition Tribunal and other agencies that don't fit case law/legislation/doctrine cleanly. No public REST API; access is via the web app, a Word add-in, or an MCP connector listed in the Claude/ChatGPT directories (available on the free plan).

case_lawlegislationdoctrine

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

Vaquill AI

PaidUnited States

Structured, citation-linked access to United States primary law — federal and all 50 states, D.C., and Puerto Rico. 5,000,000+ sections covering the U.S. Code (60,170 sections), Code of Federal Regulations (222,430 sections), Federal Register rules (196,237), and state statutes (1.93M+ sections), plus Statutes at Large as enacted from 1789 to 2026 (429,297 entries), 31 years of CFR annual editions since 1996, 97,025 federal agency guidance documents from 53 named sources across 26 agencies, and 100,920 federal administrative adjudications from seven tribunals. Point-in-time lookups reconstruct any section's text as of a past date, with Bluebook and state-specific citation resolution (e.g., 42 U.S.C. § 1983, Cal. Civ. Code § 1946.2). CFR data is refreshed daily, U.S. Code weekly, and state regulations monthly.

legislation

Vaquill AI — India

PaidIndia

Structured, section-level access to Indian legislation: 64,000+ acts across Central, State and regulatory sources (745,000+ individually addressable sections) spanning all 41 Indian jurisdictions. Sourced from official publishers only (India Code, state gazettes, and 50 regulator sites including RBI, SEBI, IRDAI, TRAI, CCI).

legislation64,179 documents

Yuandian (元典)

PaidChina

Legal-data layer of Yuandian Open Platform (元典开放平台), the API/MCP arm of 华宇元典, a subsidiary of publicly listed Huayu Software (华宇软件). The platform's own homepage (live counters) states 183M+ judgment documents (~174M court judgments, ~9.18M procuratorate documents, 50,000 curated authoritative cases) and 6.22M+ laws and regulations at every level — the two categories this catalog covers, accessed through 9 of its 40 API endpoints (5 for laws/regulations, 4 for case documents). It also indexes 138M+ company records across a further 31 enterprise-compliance and securities-compliance endpoints (litigation exposure, securities filings), which sit outside case law/legislation/doctrine and aren't reflected in this entry's document count. Both the REST API and the MCP (5 servers: law, case, company, securities, hallucination-check) require a key; no public terms or pricing page was found.

legislationcase_law189,220,000 documents