Federal legal data
Federal court opinions and the LAW.co layers built on them. Federal statutes (the U.S. Code) and federal regulations (the CFR) are not offered.
Not offeredThe U.S. Code, the Code of Federal Regulations and the Federal Register are not currently offered on the marketplace.
3 relevant datasets
U.S. Court Opinions (LAW.co corpus)
Federal and state court opinions in the LAW.co corpus: opinion text, case name, court, jurisdiction, decision date, docket number, reporter citations, judges, parties and attorneys. Legacy corpus is Caselaw Access Project-structured; newer opinions are ingested from CourtListener plain text behind LAW.co's copyright gate.
- Coverage
- U.S. federal, U.S. state (all 50)
- Records
- Not yet verified
- WEB
- REST
- MCP
- DOWNLOAD
LAW.co AI Case Summaries
LAW.co-generated plain-language summary, holding, key issues, topics and procedural posture for a prominence-selected subset of cases. Only enrichment that passed LAW.co's QA gate (published / approved / auto) is exposed. Machine-generated; not citable as authority.
- Coverage
- U.S. federal, U.S. state
- Records
- Not yet verified
- WEB
- REST
- MCP
- DOWNLOAD
LAW.co Case Citation Graph
Directed citation edges between cases (citing case → cited authority, with pin cite), seeded from CAP cites_to data and extended with eyecite extraction on ingest. Exposed per case as 'authorities cited' and 'cited by'.
- Coverage
- U.S. federal, U.S. state
- Records
- Not yet verified
- WEB
- REST
- MCP
- DOWNLOAD
Federal coverage today
LAW.co's corpus includes federal court opinions alongside state opinions. Filtering by court or jurisdiction is supported in search; per-court coverage has not been verified.
What federal legal data includes
Federal law has three main layers: the Constitution and statutes passed by Congress (codified in the U.S. Code), regulations issued by agencies (published in the Federal Register and codified in the Code of Federal Regulations), and decisions of the federal courts. Only the third layer is on the marketplace today.
Federal opinions come through the same pipeline as state opinions, with the same fields and provenance. LAW.co's summaries and citation graph cover federal and state cases alike, limited to the published subset for summaries.
Where to get the other layers
The U.S. Code, the CFR and the Federal Register are published by the federal government and are generally free to access from official sources. They are not on the marketplace because no provider has listed them with confirmed provenance and delivery. A provider that packages them with versioning and effective dates would be a strong fit for the program.
Using federal opinions well
Federal decisions are often cited across circuits and by state courts on federal questions, which makes the citation graph useful for seeing how an opinion has traveled. Remember that cited-by shows citation, not agreement, and that LAW.co's endpoint caps how many citing cases a single record returns.
Provenance on every record
Whatever the topic, each legal record carries the same provenance fields, so you can tell source text from derived work and cite it correctly.
- provider / sourceId
- Who served the record and its id at that provider.
- upstreamSource
- Where the provider got it (for example CAP or CourtListener), or null if not stated.
- canonicalUrl
- Public URL for the record, when one exists.
- licenseId
- The license that applies, such as public domain for court-authored text.
- isDerived
- false for original text and facts; true for AI or editorial layers.
- retrievedAt
- When Data.co fetched it from the provider.
Access today
Individual cases can be read now on LAW.co's own public case pages. REST API and MCP access through Data.co are live for court opinions, case summaries and the citation graph. Previews on this site are synthetic samples titled [DEMO] that are never billed; the API returns live records. Bulk downloads stay closed until the provider confirms redistribution rights.
Each dataset page shows its status channel by channel, with the reason for anything that is not open, so you can plan an integration without guessing.
Federal: common questions
Are Supreme Court opinions included?
The corpus includes federal court opinions. We have not verified per-court coverage, so we cannot promise any specific court or term is complete.
Can I filter to federal cases only?
Yes, with the jurisdiction or court filters on search. They are applied to a sample of up to 50 upstream matches today.
Will federal regulations be added?
Only if a provider lists them. Tell us if you need them through the regulations page — demand helps us prioritize.
Are federal opinions public domain?
Opinions written by federal judges in their official capacity are not protected by copyright. Material added by publishers, such as headnotes, can be, which is why possible headnotes are excluded.
More in the legal hub
Case Law
U.S.
Court Opinions
Federal and state court opinions from the LAW.co corpus: opinion text, court, decision date, docket, citations, judges and parties, with source provenance..
Jurisdictions
Which U.S.
State
U.S.
Legal Research
How to use LAW.co case law on the Data.co Marketplace for legal research tools and AI agents: retrieval, citation lookup, provenance and limits..
Statutes
Full statute corpora are not currently offered on the Data.co Marketplace.
Regulations
Federal and state regulations are not currently offered on the Data.co Marketplace.
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