/statutes/*) serves statutes, regulations, constitutions,
court rules, and executive actions, scoped with the corpusType filter.
Coverage is queryable live from GET /statutes/coverage and GET /statutes/states;
the per-corpus matrix below is a snapshot as of 2026-08-06. In total the
ingested corpus holds over 3.86M distinct sections across all of these
corpus types, indexed as more than 9.9M retrieval passages.
Counts on this page are distinct sections (one per provision or document),
the same figures
GET /statutes/coverage returns. For retrieval, longer sections
and documents are split into multiple passages, so the underlying index holds far
more entries: about 9.9M passages across these 3.86M sections. The Federal
Register alone (long agency rules, 13-15 passages each) accounts for over
half of them.That split does not change what the API returns: a lookup by citation 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, ~685K 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), ~7.7K sections, with article/section structure and clickable citations. Queryable via the API (
corpusType=STATE_CONSTITUTION).Court rules
10 states, ~11.9K rules (civil, criminal, appellate, and local), refreshed weekly. Queryable via the API (
corpusType=STATE_RULES).State regulations
45 states, 1.16M+ 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).Federal
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.category, but all sit behind the single
corpusType=AGENCY_GUIDANCE token — new sources land as one registry entry,
not a new API token.
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.
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 viacorpusType=STATE_AGENCY_GUIDANCE,
paired with state.
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 a snapshot; call/statutes/coverage or /statutes/states for the live count of
any jurisdiction.
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
Federal corpora we do not serve yet. All of them are work in progress and targeted to land by the start of Q4 2026. Each goes through the same pipeline as everything above - ingested from the official source, chunked and embedded for hybrid search, citation-linked, and put on a recurring refresh - so it arrives queryable through the samecorpusType filter.
Federal law and court rules
Tax
Two additional IRS corpora, beyond the IRS notices, revenue procedures, revenue rulings, and announcements already served under Agency guidance above.US Tax Treaties and Treasury’s Technical Explanations of each treaty are
now covered (see the Federal table above), no longer planned items.
Agencies not yet covered
No documents from these agencies are in the corpus today. Counts are the document categories planned for each.DOJ & FTC Merger Guidelines and the DOJ Antitrust Division Leniency Policy
are now covered (see Agency guidance above), reducing FTC’s and DOJ
Antitrust’s remaining planned categories. US Copyright Office Circulars,
the DOJ Justice Manual, the USCIS Policy Manual, and USPTO MPEP/TMEP are
all fully covered and no longer appear in this table.
Other federal guidance
None of these are queryable yet.
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 this page. See
Coverage monitoring for a scheduled
diff you can wire up.How to query a jurisdiction
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.