The most complete
US primary law API
- 4.8M+
- primary-law sections
- 52
- US jurisdictions
- REST + MCP
- two ways to call
The law, and the paper trail behind it.
What builders said when we open-sourced it.
See the launch post on LinkedInFrom key to cited law in three steps.
1.Get your key
2.Make your first call
3.Ship cited law
10 endpoints. Every layer of US primary law.
Base URLhttps://api.vaquill.aiSection lookup
Once you have an ID or citation
/api/v1/statutes/resolveResolve a Bluebook citation straight to its section
/api/v1/statutes/section/{act_id}Get a section, citation, title, and hierarchy metadata
/api/v1/statutes/section/{act_id}/bodyGet the full text of a section, HTML and plain text
/api/v1/statutes/section/{act_id}/relatedGet the sections immediately before and after this one
/api/v1/statutes/sectionsBatch metadata for up to 50 sections in one call
Discover the corpus
Free, browse before you query
/api/v1/statutes/statesFreeList every jurisdiction, with its ingested section count
/api/v1/statutes/lawsFreeCatalog the bodies of law available, by jurisdiction
/api/v1/statutes/codesFreeList the statutory codes ingested for one US state
/api/v1/statutes/divisionsFreeWalk the statutory hierarchy one level at a time
/api/v1/statutes/coverageFreeSelf-describing coverage matrix, by jurisdiction and corpus type
Every US jurisdiction. One schema.
- ALAlabama
- AKAlaska
- AZArizona
- ARArkansas
- CACalifornia
- COColorado
- CTConnecticut
- DEDelaware
- DCDistrict of Columbia
- FLFlorida
- GAGeorgia
- HIHawaii
- IDIdaho
- ILIllinois
- INIndiana
- IAIowa
- KSKansas
- KYKentucky
- LALouisiana
- MEMaine
- MDMaryland
- MAMassachusetts
- MIMichigan
- MNMinnesota
- MSMississippi
- MOMissouri
- MTMontana
- NENebraska
- NVNevada
- NHNew Hampshire
- NJNew Jersey
- NMNew Mexico
- NYNew York
- NCNorth Carolina
- NDNorth Dakota
- OHOhio
- OKOklahoma
- OROregon
- PAPennsylvania
- PRPuerto Rico
- RIRhode Island
- SCSouth Carolina
- SDSouth Dakota
- TNTennessee
- TXTexas
- UTUtah
- VTVermont
- VAVirginia
- WAWashington
- WVWest Virginia
- WIWisconsin
- WYWyoming
- ALAlabama
- AKAlaska
- AZArizona
- ARArkansas
- CACalifornia
- COColorado
- CTConnecticut
- DEDelaware
- DCDistrict of Columbia
- FLFlorida
- GAGeorgia
- HIHawaii
- IDIdaho
- ILIllinois
- INIndiana
- IAIowa
- KSKansas
- KYKentucky
- LALouisiana
- MEMaine
- MDMaryland
- MAMassachusetts
- MIMichigan
- MNMinnesota
- MSMississippi
- MOMissouri
- MTMontana
- NENebraska
- NVNevada
- NHNew Hampshire
- NJNew Jersey
- NMNew Mexico
- NYNew York
- NCNorth Carolina
- NDNorth Dakota
- OHOhio
- OKOklahoma
- OROregon
- PAPennsylvania
- PRPuerto Rico
- RIRhode Island
- SCSouth Carolina
- SDSouth Dakota
- TNTennessee
- TXTexas
- UTUtah
- VTVermont
- VAVirginia
- WAWashington
- WVWest Virginia
- WIWisconsin
- WYWyoming
Every layer of US primary law: the US Code, the Code of Federal Regulations, Federal Register agency rules, the statute codes of all 52 US jurisdictions (50 states, DC, and Puerto Rico), state regulations, state and federal constitutions, the Federal Rules of Procedure, and every Executive Order, Proclamation, and Presidential Memo since 2015. About 4.8M+ sections in one schema, each with a citation and a link to the official source.
Need a source we don't cover yet?
A specific set of government PDFs, or a slice of administrative law shaped for your product. Turning messy government data into clean, structured law is the whole job here, so bring us the hard ones.











