API Coverage

Every US jurisdiction and corpus type the API has ingested: federal law, state statutes, constitutions, court rules, and regulations, each scoped with the corpusType filter. Over 3.9M distinct sections, indexed as over 10.4M retrieval passages. Figures below are a 2026-08-11 snapshot; query them live from GET /statutes/coverage and GET /statutes/states.

Counts here are distinct sections, one per provision or document, matching what GET /statutes/coverage returns. Longer documents split into several passages for retrieval, so the index holds more entries than sections, over half of them Federal Register rules at 13-15 passages each.That does not change what you get back: a citation lookup still resolves to one section with its full text.

What’s in the corpus

State statutes

52 jurisdictions (all 50 states + DC + Puerto Rico), ~2.0M sections. Queryable via the statutes API.

Federal law

9 corpora, ~687K sections — US Code, CFR, Federal Register rules, Executive Orders, agency guidance, court rules, the Constitution, and more. See the Federal table for the full breakdown. Queryable via the statutes API.

State constitutions

51 jurisdictions (50 states + Puerto Rico), ~12.7K sections, with article/section structure and clickable citations. Every state is sourced from its own official publisher. Two states remain partially covered, a data-availability gap in the source rather than a parsing issue. Queryable via the API (corpusType=STATE_CONSTITUTION).

Court rules

28 states, ~28.7K rules (civil, criminal, appellate, evidence, professional conduct, and local), refreshed monthly. All ingested from each state’s own official court or legislature publisher. Queryable via the API (corpusType=STATE_RULES).

State regulations

46 states, 1.18M+ rules, with effective dates and statutory authority. All ingested from each state’s own official publisher and refreshed monthly. Queryable via the API (corpusType=REGULATION).

Every section is indexed for hybrid semantic + keyword search and mirrored in multiple formats (HTML, PDF, XML, plain text, DOCX) where the source provides them.

Federal

Corpus	Sections	Refresh
United States Code (USC)	54,853	Weekly
Code of Federal Regulations (CFR)	219,392	Daily
↳ Federal Acquisition Regulation (FAR), 48 C.F.R. ch. 1 (within CFR above)	5,537	Daily
↳ Defense FAR Supplement (DFARS), 48 C.F.R. ch. 2 (within CFR above)	2,877	Daily
Federal Register agency rules (final + proposed), 1994-present	385,860	Weekly
Executive Orders (Federal Register Presidential Documents), 2015-present	3,808	Daily
Agency guidance — 30 named sources across 16 agencies (see table below)	21,684	Weekly
Federal Rules of Procedure — Civil (FRCP), Criminal (FRCrP), Evidence (FRE), Appellate (FRAP) and Bankruptcy (FRBP), incl. Supplemental Admiralty and Social Security Rules — and Rules of the Supreme Court of the United States	589	Monthly
US Constitution	74	On amendment
US Sentencing Guidelines (U.S.S.G.)	302	Annual
US Tax Treaties (bilateral income and estate tax treaties, citable by article) and Treasury’s Technical Explanations (article-by-article commentary)	119	As treaties are signed

The Federal Register and Executive Order cadence depends on federalregister.gov, which has been throttling and rate-limiting traffic in 2026. That can occasionally push a weekly pull later.

Agency guidance is a registry of named sources. Each is independently filterable by its own category, but all sit behind the single corpusType=AGENCY_GUIDANCE token — new sources land as one registry entry, not a new API token.

Source	Docs	Coverage	Citable as
Social Security Administration (SSA) Rulings	1,115	—	—
Internal Revenue Service (IRS) Revenue Procedures/Rulings/Notices/Announcements	1,459	2015-present	—
Department of Justice (DOJ) & Federal Trade Commission (FTC) Merger Guidelines	—	2023	—
DOJ Antitrust Division Leniency Policy	—	—	—
US Copyright Office Circulars	58	—	—
DOJ Justice Manual	1,548 sections, 9 Titles	—	“Justice Manual § 9-27.420”
US Citizenship and Immigration Services (USCIS) Policy Manual	456 chapters, 12 volumes	—	“USCIS Policy Manual, Vol. 12, Pt. D, Ch. 3”
US Patent and Trademark Office (USPTO) Manual of Patent Examining Procedure (MPEP)	2,024 sections, 29 chapters	—	“MPEP § 2106”
USPTO Trademark Manual of Examining Procedure (TMEP)	2,109 sections, 19 chapters	—	“TMEP § 1207.01”
DFARS Procurement Guidance and Information (PGI)	397 documents, 47 Parts	—	“PGI 225.370”
National Labor Relations Board (NLRB) General Counsel Memoranda	300	1973-present	”NLRB General Counsel Memorandum GC 22-04”
NLRB Division of Advice Memoranda	339	Rolling 10-year window	”NLRB Division of Advice Memorandum, Case No. 13-CA-182757 (Savage Fueling)“
Commodity Futures Trading Commission (CFTC) Staff Letters (no-action, exemptive, interpretative, advisory)	942	2008-present	”CFTC Letter No. 26-17”; filterable by regulation part or topic tag
Federal Reserve Supervision and Regulation (SR) / Consumer Affairs (CA) Letters	336	Since 1990	”SR 21-4 / CA 21-2”
Office of the Comptroller of the Currency (OCC) Bulletins	606	Since 1994	—
OCC Interpretive Letters	448	1996-present	”OCC Interpretive Letter No. 1188”
Federal Deposit Insurance Corporation (FDIC) Financial Institution Letters (FILs)	2,313	Since 1994	Spans active + inactive FIL indexes; superseded letters queryable with `act_status=superseded`
Financial Crimes Enforcement Network (FinCEN) Administrative Rulings	86	Since 1988	”FinCEN Ruling FIN-2009-R001”
FinCEN Guidance (alerts, advisories, notices, bulletins, fact sheets)	127	—	“FinCEN Guidance FIN-2019-G001”
Consumer Product Safety Commission (CPSC) Office of General Counsel (OGC) Advisory Opinions	139	1973-2012	”CPSC OGC Advisory Opinion No. 82” — historical archive, not currently updated
Bureau of Industry and Security (BIS) Advisory Opinions (Export Administration Regulations, EAR)	33	2003-2023	”BIS Advisory Opinion, 09/25/23: Export guidance and BIS interpretation of ‘gene’ related to ECCN 1C353”
Directorate of Defense Trade Controls (DDTC) Commodity Jurisdiction Determinations (International Traffic in Arms Regulations / US Munitions List vs. EAR)	5,879	2010-present	From DDTC’s own published XLSX export
DDTC Guidance (incl. Guidelines for Preparing Agreements, ITAR Risk Matrix)	7	—	—
CPSC Small Entity Compliance Guides	34	—	“CPSC Small Entity Compliance Guide: Safety Standard for Neck Floats (90 FR 58096)“
Federal Communications Commission (FCC) Declaratory Rulings	169	—	“DA-26-680: (07/07/26)“
Federal Energy Regulatory Commission (FERC) Policy Statements	45	Since 1996	”___ FERC ¶ _____” (bound-volume Reports form)
Department of Energy (DOE) Appliance Standards Guidance and FAQs	60	—	“DOE Appliance Standards Guidance: ()”; draft guidance excluded
Health and Human Services (HHS) Office for Civil Rights (OCR) guidance on the Health Insurance Portability and Accountability Act (HIPAA)	41	—	—
HHS OCR resolution agreements and civil money penalties	140	—	—
HHS OCR HIPAA FAQs (deduplicated from HHS’s cross-listed topic pages)	444	—	—
Vaquill-synthesized administrative guidance	State and local tax (SALT) cap, Child Tax Credit (CTC), 401(k) limits	—	—

FERC Policy Statements are FERC’s generally-applicable interpretive vehicle — deliberately narrower than the docket-based eLibrary universe of case-specific orders.

State and territory matrix

Counts are distinct sections (documents), the same figures /statutes/coverage returns. A dash means that corpus type is not yet ingested for that jurisdiction. Sorted by statute volume. Every regulation count is ingested from that state’s own official publisher and refreshed on the same monthly cycle; see Refresh cadence.

Jurisdiction	Statutes	Regulations	Constitution	Court Rules
California	161,439	76,155	362	1,521
Mississippi	158,698	35,752	600	784
Texas	122,908	44,256	401	1,016
Indiana	83,148	37,739	247	879
Illinois	72,456	53,776	140	852
New Jersey	55,923	51,999	205	-
Washington	53,595	51,053	268	1,182
Nevada	48,190	34,302	233	1,338
Alabama	45,997	18,305	381	-
Louisiana	43,474	29,213	325	-
Michigan	40,658	22,963	307	-
New York	40,140	50,266	220	1,885
South Dakota	39,805	28,988	270	-
Maryland	39,562	12,871	303	1,220
Arkansas	36,936	5,556	702	-
Oklahoma	36,287	57,195	456	-
Oregon	36,204	48,708	414	632
New Mexico	34,465	13,274	265	-
Colorado	34,258	917	575	-
Virginia	33,856	22,396	130	358
Ohio	33,168	30,010	226	-
Tennessee	32,693	-	149	626
Montana	30,524	32,183	161	238
South Carolina	29,974	6,630	175	557
Missouri	29,296	9,613	402	-
North Dakota	29,052	17,227	203	2,246
Iowa	28,223	26,605	190	-
Georgia	28,165	18,889	287	-
Minnesota	27,757	15,449	137	999
North Carolina	26,695	30,248	155	-
Utah	26,602	-	189	919
Nebraska	25,998	14,044	208	-
West Virginia	25,669	20,105	204	-
New Hampshire	25,385	-	156	970
Maine	25,342	3,005	153	722
Florida	24,866	32,791	213	1,135
Kansas	24,371	-	213	-
District of Columbia (territory)	23,695	-	-	-
Puerto Rico (territory)	23,649	-	102	-
Vermont	23,527	1,050	98	-
Massachusetts	23,152	24,742	100	970
Idaho	22,754	8,551	234	766
Arizona	22,684	16,463	323	1,720
Delaware	21,741	1,164	207	-
Rhode Island	21,115	12,070	118	1,033
Kentucky	20,946	4,881	274	-
Hawaii	19,437	26,735	159	1,259
Wisconsin	18,158	17,830	161	395
Alaska	17,942	24,771	214	763
Connecticut	16,091	17,468	146	-
Pennsylvania	14,547	52,702	213	1,723
Wyoming	10,229	18,554	135	-

State agency guidance

State-issued regulatory guidance (bulletins, circular letters) that interprets state law - the state-scoped analog of Agency guidance above. Unlike statutes, regulations, constitutions, and court rules, this is not on a comprehensive 52-jurisdiction rollout: it lands state by state, and some states may never be built. Queryable via corpusType=STATE_AGENCY_GUIDANCE, paired with state.

State	Source	Documents	Refresh
California	Dept. of Insurance Bulletins	176	Weekly
Illinois	Dept. of Insurance Company Bulletins	156	Weekly
New York	DFS (Department of Financial Services) Insurance Circular Letters	1,199	Weekly
Texas	Dept. of Insurance Commissioner’s Bulletins	1,254	Weekly
Florida	Office of Insurance Regulation Informational Memoranda	43	Weekly
Georgia	Office of Commissioner of Insurance and Safety Fire Bulletins	66	Weekly
Ohio	Dept. of Insurance Bulletins	112	Weekly
Virginia	State Corporation Commission (SCC) Bureau of Insurance Administrative Letters	89	Weekly
Washington	Office of the Insurance Commissioner (OIC) Technical Assistance Advisories and Emergency Orders	24	Weekly
New Jersey	Dept. of Banking and Insurance Bulletins	441	Weekly
Michigan	Department of Insurance and Financial Services (DIFS) Insurance Bulletins	145	Weekly
North Carolina	Dept. of Insurance Bulletins	120	Weekly
Wisconsin	Office of the Commissioner of Insurance Bulletins	232	Weekly
Connecticut	Insurance Department Bulletins	369	Weekly
Maryland	Insurance Administration Bulletins	675	Weekly
Minnesota	Dept. of Commerce Insurance Bulletins	34	Weekly
Indiana	Dept. of Insurance Bulletins	281	Weekly
Massachusetts	Division of Insurance Bulletins	417	Weekly

This corpus is a pilot. It does not include NAIC (National Association of Insurance Commissioners) model law text, which is a copyrighted, commercially sold publication, not open government primary law - only each state’s own published bulletin, issued under that state’s own authority, is in scope.

Refresh cadence

How often each corpus is re-pulled from its official source. The counts above are current as of the date at the top of this page and grow between updates; call /statutes/coverage or /statutes/states for the live count of any jurisdiction.

Corpus	Cadence
Federal	See the Federal table: daily to weekly, and on amendment for the Constitution.
State statutes	Recurring pull from each state’s official source. All 50 states plus DC and Puerto Rico are covered; a few one-time cutovers (for example Puerto Rico) are complete but not yet on an automatic refresh driver.
State regulations	Pulled monthly from each state’s own official publisher, for all 46 states carrying regulations.
State court rules	Monthly, for the states that carry them. Court rules change less often than statutes, and when they do the change is procedural and effective on a published date rather than immediately.
State constitutions	Monthly, all jurisdictions in one pass (constitutions change on the order of years via ballot-measure amendments, not weeks, so this is deliberately lower-frequency than statutes/regulations).

Pennsylvania’s Consolidated Statutes are complete; its older unconsolidated (Purdon’s) statutes are a separate later addition, prioritized for backfill. Constitutions and court rules roll out state by state.

Coming next

This page covers what is queryable today. Corpora that are planned but not yet served, along with what is deliberately out of scope, live on the Roadmap.

GET /statutes/coverage is self-describing: new corpora appear there as they land, so polling it is the reliable way to detect one rather than tracking either page. See Coverage monitoring for a scheduled diff you can wire up.

How to query a jurisdiction

# Self-describing coverage matrix: every corpusType and its per-jurisdiction counts
curl https://api.vaquill.ai/api/v1/us/statutes/coverage \
  -H "Authorization: Bearer vq_key_..."

# Live coverage with current section counts
curl https://api.vaquill.ai/api/v1/us/statutes/states \
  -H "Authorization: Bearer vq_key_..."

# Statutory codes for one state (e.g. Mississippi)
curl "https://api.vaquill.ai/api/v1/us/statutes/codes?state=ms" \
  -H "Authorization: Bearer vq_key_..."

# Search within a state
curl -X POST https://api.vaquill.ai/api/v1/us/statutes/search \
  -H "Authorization: Bearer vq_key_..." \
  -H "Content-Type: application/json" \
  -d '{"query": "landlord retaliation", "corpusType": "STATE", "state": "ms"}'

# Search state regulations (corpusType REGULATION, paired with a state)
curl -X POST https://api.vaquill.ai/api/v1/us/statutes/search \
  -H "Authorization: Bearer vq_key_..." \
  -H "Content-Type: application/json" \
  -d '{"query": "stormwater discharge permit", "corpusType": "REGULATION", "state": "wa"}'

Each column in the matrix above maps to a corpusType filter on /statutes/search: statutes to STATE, regulations to REGULATION, constitutions to STATE_CONSTITUTION, and court rules to STATE_RULES. Federal Register agency rules use FEDERAL_REGISTER and agency guidance uses AGENCY_GUIDANCE. State agency guidance (the section above) uses STATE_AGENCY_GUIDANCE, paired with state.

API Reference

Every endpoint with parameters and examples.

Open source: Vaquill-AI/open-us-law

The ingestion pipeline behind this corpus - the bulk-source parsers, scrapers, and the JSONL schema for US statutes, regulations, court rules, and federal law - is open source under a permissive license. Build your own copy of the corpus, or contribute a source.

DATA COVERAGE

GET STARTED

CORE CONCEPTS

LAW CHANGE ALERTS

WORKING WITH THE API

GROUNDING AI

RECIPES

USE CASES

What’s in the corpus

State statutes

Federal law

State constitutions

Court rules

State regulations

Federal

State and territory matrix

State agency guidance

Refresh cadence

Coming next

How to query a jurisdiction

API Reference

Open source: Vaquill-AI/open-us-law

​What’s in the corpus

State statutes

Federal law

State constitutions

Court rules

State regulations

​Federal

​State and territory matrix

​State agency guidance

​Refresh cadence

​Coming next

​How to query a jurisdiction

API Reference

Open source: Vaquill-AI/open-us-law

What’s in the corpus

Federal

State and territory matrix

State agency guidance

Refresh cadence

Coming next

How to query a jurisdiction