Compare this provision against other states
Provisions in other states that address the same subject as a given state statute section.
Cost: 6 credits. Not-found, failed lookups, sections outside the state statute corpus, and calls where no other state holds a comparable provision (empty neighbors, with a note) are not charged.
Every state words and numbers its provisions differently, so comparing a rule across jurisdictions normally means running one search per state and reconciling the results by hand. This starts from one section you already have and returns the comparable provision elsewhere.
At most one provision per state, most similar first, so the response reads as a jurisdiction comparison rather than a relevance list. statesCovered tells you how many distinct states are represented. A state whose best provision is not on the same subject is left out rather than padded in (nothing scoring below 0.55 is served), and definitions, short-title and statement-of-purpose sections are never offered as the comparable provision of a substantive section. Historical editions and repealed or superseded provisions are never offered.
Scope: state statute sections. USC, CFR, regulations and court rules return empty with a note, refunded, since a federal section has no state analogue by definition.
What similarity is: a retrieval score between 0 and 1, describing how closely two provisions read. It is not a legal opinion. A high score means the provisions cover the same ground, never that they impose the same obligation, and the differences are usually the point. Treat this as the shortlist to read, not the answer. Each neighbour also carries matchQuality (strong, moderate or weak), the same tier names POST /us/statutes/search uses, read off the relevance score: lead with strong and moderate. A state with nothing comparable is left out, and a section with no comparable provision anywhere answers with an empty neighbors and a note.
Request
- Base URLhttps://api.vaquill.ai
- Auth
- HTTP bearer
- or API key in header X-API-Key
- TypeScriptA function with typed inputs. Its response is checked against the schema.
Path parameters
Section identifier, e.g. USC_T42_C21_S1983 (Title 42, Chapter 21, Section 1983, which a lawyer writes as 42 U.S.C. § 1983). Take it from a /us/statutes/search or /us/statutes/resolve result.
A citation also works here: 26 U.S.C. § 1, 42 USC 1983 or Cal. Civ. Code § 1950.5 is resolved with the same resolver /resolve uses, and the section is served. A citation costs this endpoint's price PLUS the /resolve price (2 credits), charged as its own line whether or not it resolves, exactly as /resolve charges; that is the same total as calling /resolve and then this endpoint, in one round trip. An exact act_id costs only this endpoint's price. When a citation resolves, or when the id only matched after surrounding whitespace, quotes or a trailing period were removed, the response carries resolvedFrom saying what your input was matched as. Check it the way you would check a /resolve answer. A citation containing / cannot travel in a URL path segment; resolve it with GET /us/statutes/resolve instead.
Do not assemble an id from a citation: the title and section are derivable, but the CHAPTER is not, so USC_T26_S1 misses. A miss returns 404 with reason and, where the section exists under another id, didYouMean.
State session laws (acts as enacted, ids starting SSL_) are not code sections: read them at /us/session-laws/{sessionLawId}.
Query parameters
Maximum states to return, one provision each.
Headers
Optional. 16 to 255 visible ASCII characters (a UUIDv4 is ideal). A retry with the same key and the same request replays the original 2xx response for 24 hours without charging again. The same key with a different request is rejected. Scope is the API key, method, path and body. The stored response body is a query-derived cache controlled by the account's data retention setting cacheQueryDerivedData: when it is false the body is never stored and a retry answers 409 idempotency_replay_unavailable, without charging again.
Response
The section plus comparable provisions in other states.
Example response
{
"section": {
"source": "sct",
"body": "(a) If within a reasonable time after written or oral notice...",
"bodyUnavailable": true,
"bodyUnavailableReason": "image_only_source",
"bodyNote": "fetch_failed",
"matchContexts": [
{
"text": "(a) An employer shall not retaliate against an employee who files a complaint",
"highlights": [
[
7,
15
],
[
26,
35
]
]
}
],
"renumberedTo": "self:4651",
"renumberedToLabel": "section 10105 of Title 34",
"transferredTo": "34:10105",
"transferredToLabel": "section 10105 of Title 34",
"issueDate": "1999-05-25",
"statutoryAuthority": [
{
"display": "15 U.S.C. 78o",
"section": "78o",
"title": 15,
"type": "usc"
}
],
"implementingRegulations": [
{
"cfrTitle": 17,
"display": "17 CFR Part 240",
"part": "240",
"partName": "General Rules"
}
],
"rescindedOn": "2016-07-01",
"pendingAdoptions": [
{
"agency": "Department of Financial Services",
"effectiveDate": "2026-09-23",
"idNo": "DFS-23-26-00013-A",
"issueDate": "2026-09-23",
"scope": "part"
}
],
"adoptedAfterCurrentThrough": true,
"responseBounds": {
"truncated": true,
"fields": [
{
"field": "publicLaws",
"unit": "items",
"total": 190,
"returned": 50,
"nextOffset": 50
}
]
},
"effectiveDate": "2002-11-25",
"effectiveDateRaw": "September 8, 1916",
"historyEffectiveDate": "2009-06-19",
"priorEffectiveDates": [
"2004-12-17",
"2012-11-01"
],
"pendingAmendments": [
{
"id": "FRULES_FRCP_R26_P2027",
"status": "approved_by_standing_committee",
"cycle": 2027,
"effectiveDate": "2027-12-01",
"commentPeriodEnd": "2026-02-16",
"sourceUrl": "https://www.uscourts.gov/rules-policies/pending-rules-and-forms-amendments",
"textComplete": true,
"commentDocketIds": [
"USC-RULES-CV-2025-0004"
]
}
],
"abstract": "This regulation extends time-limited tolerances for pesticides.",
"agencies": [
"Environmental Protection Agency"
],
"agencySlugs": [
"environmental-protection-agency"
],
"topics": [
"Environmental protection",
"Pesticides and pests"
],
"documentTypeLabel": "Rule",
"documentSubtype": "Proclamation",
"action": "Final rule.",
"president": "George W. Bush",
"signingDate": "2026-04-02",
"executiveOrderNumber": "14179",
"proclamationNumber": "10886",
"instrumentNumberSource": "derived_from_text",
"datesText": "This regulation is effective December 14, 2001.",
"frVolume": 66,
"frStartPage": 64768,
"frEndPage": 64775,
"wordCount": 6271,
"issuingAgency": "Pollution Control Board",
"adoptingCitations": [
"37 Ill. Reg. 16539"
],
"lawImplemented": "Section 4656.1, Public Resources Code",
"lastAmendedDate": "2013-10-04",
"amendmentNote": "Amended at 37 Ill. Reg. 16539, effective October 4, 2013",
"currencyYear": 2025,
"reviewDate": "11/1/2028",
"originalEnactmentDate": "1934-06-27",
"originalEnactmentDateRaw": "June 27, 1934",
"releaseDate": "2018-06-14",
"documentNumber": "21-CA-211066",
"caseName": "Dunn-Edwards Corp.",
"forum": "Administrative Proceeding",
"court": "U.S. District Court for the District of Massachusetts",
"relatedDocuments": [
"Consent Order",
"Stipulation"
],
"settlementAmount": "$16,500",
"requesters": [
"Preece, Inc."
],
"program": "Old-Age and Survivors Insurance",
"languageCode": "es",
"volume": 1,
"articleNumber": "1",
"articleName": "Declaration of Rights",
"ruleSetCode": "NDSUPCTADMINR",
"edition": "2025",
"relatedCitations": [
"RCW 28A.150.290"
],
"supersessionActions": {
"modifies": [
"Rev. Proc. 2011-47"
]
},
"subtitle": "11",
"subtitleName": "AIR QUALITY",
"publisherKey": "430000000310400000000000000000000",
"versionId": "11948",
"referencedShortTitles": [
"Driftnet Modernization and Bycatch Reduction Act"
],
"subjectNumber": "47",
"audience": "All Persons Engaged in Marketing",
"sourceCharStart": 263194,
"sourceCharEnd": 264198,
"matchSegment": "note",
"matchNoteYear": 1993,
"alternateCitations": [
"4 L.P.R.A. § 2077"
],
"expirationDate": "2029-03-01",
"expirationDateRaw": "03-01-2029",
"sourcePageStart": 114,
"sourcePageEnd": 114,
"displayLabel": "MPEP § 2165.03",
"publicationDate": "2001-12-14",
"topLevelTitle": "Title 9: Criminal",
"externalUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists",
"sourceUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists"
},
"neighbors": [
{
"section": {
"source": "sct",
"body": "(a) If within a reasonable time after written or oral notice...",
"bodyUnavailable": true,
"bodyUnavailableReason": "image_only_source",
"bodyNote": "fetch_failed",
"matchContexts": [
{
"text": "(a) An employer shall not retaliate against an employee who files a complaint",
"highlights": [
[
7,
15
],
[
26,
35
]
]
}
],
"renumberedTo": "self:4651",
"renumberedToLabel": "section 10105 of Title 34",
"transferredTo": "34:10105",
"transferredToLabel": "section 10105 of Title 34",
"issueDate": "1999-05-25",
"statutoryAuthority": [
{
"display": "15 U.S.C. 78o",
"section": "78o",
"title": 15,
"type": "usc"
}
],
"implementingRegulations": [
{
"cfrTitle": 17,
"display": "17 CFR Part 240",
"part": "240",
"partName": "General Rules"
}
],
"rescindedOn": "2016-07-01",
"pendingAdoptions": [
{
"agency": "Department of Financial Services",
"effectiveDate": "2026-09-23",
"idNo": "DFS-23-26-00013-A",
"issueDate": "2026-09-23",
"scope": "part"
}
],
"adoptedAfterCurrentThrough": true,
"responseBounds": {
"truncated": true,
"fields": [
{
"field": "publicLaws",
"unit": "items",
"total": 190,
"returned": 50,
"nextOffset": 50
}
]
},
"effectiveDate": "2002-11-25",
"effectiveDateRaw": "September 8, 1916",
"historyEffectiveDate": "2009-06-19",
"priorEffectiveDates": [
"2004-12-17",
"2012-11-01"
],
"pendingAmendments": [
{
"id": "FRULES_FRCP_R26_P2027",
"status": "approved_by_standing_committee",
"cycle": 2027,
"effectiveDate": "2027-12-01",
"commentPeriodEnd": "2026-02-16",
"sourceUrl": "https://www.uscourts.gov/rules-policies/pending-rules-and-forms-amendments",
"textComplete": true,
"commentDocketIds": [
"USC-RULES-CV-2025-0004"
]
}
],
"abstract": "This regulation extends time-limited tolerances for pesticides.",
"agencies": [
"Environmental Protection Agency"
],
"agencySlugs": [
"environmental-protection-agency"
],
"topics": [
"Environmental protection",
"Pesticides and pests"
],
"documentTypeLabel": "Rule",
"documentSubtype": "Proclamation",
"action": "Final rule.",
"president": "George W. Bush",
"signingDate": "2026-04-02",
"executiveOrderNumber": "14179",
"proclamationNumber": "10886",
"instrumentNumberSource": "derived_from_text",
"datesText": "This regulation is effective December 14, 2001.",
"frVolume": 66,
"frStartPage": 64768,
"frEndPage": 64775,
"wordCount": 6271,
"issuingAgency": "Pollution Control Board",
"adoptingCitations": [
"37 Ill. Reg. 16539"
],
"lawImplemented": "Section 4656.1, Public Resources Code",
"lastAmendedDate": "2013-10-04",
"amendmentNote": "Amended at 37 Ill. Reg. 16539, effective October 4, 2013",
"currencyYear": 2025,
"reviewDate": "11/1/2028",
"originalEnactmentDate": "1934-06-27",
"originalEnactmentDateRaw": "June 27, 1934",
"releaseDate": "2018-06-14",
"documentNumber": "21-CA-211066",
"caseName": "Dunn-Edwards Corp.",
"forum": "Administrative Proceeding",
"court": "U.S. District Court for the District of Massachusetts",
"relatedDocuments": [
"Consent Order",
"Stipulation"
],
"settlementAmount": "$16,500",
"requesters": [
"Preece, Inc."
],
"program": "Old-Age and Survivors Insurance",
"languageCode": "es",
"volume": 1,
"articleNumber": "1",
"articleName": "Declaration of Rights",
"ruleSetCode": "NDSUPCTADMINR",
"edition": "2025",
"relatedCitations": [
"RCW 28A.150.290"
],
"supersessionActions": {
"modifies": [
"Rev. Proc. 2011-47"
]
},
"subtitle": "11",
"subtitleName": "AIR QUALITY",
"publisherKey": "430000000310400000000000000000000",
"versionId": "11948",
"referencedShortTitles": [
"Driftnet Modernization and Bycatch Reduction Act"
],
"subjectNumber": "47",
"audience": "All Persons Engaged in Marketing",
"sourceCharStart": 263194,
"sourceCharEnd": 264198,
"matchSegment": "note",
"matchNoteYear": 1993,
"alternateCitations": [
"4 L.P.R.A. § 2077"
],
"expirationDate": "2029-03-01",
"expirationDateRaw": "03-01-2029",
"sourcePageStart": 114,
"sourcePageEnd": 114,
"displayLabel": "MPEP § 2165.03",
"publicationDate": "2001-12-14",
"topLevelTitle": "Title 9: Criminal",
"externalUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists",
"sourceUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists"
},
"state": "ny",
"similarity": 0.82,
"matchQuality": "strong"
}
],
"statesCovered": 5,
"resolvedFrom": {
"input": "26 U.S.C. § 1",
"actId": "USC_T26_C1_S1",
"via": "citation",
"subsection": "(h)(11)",
"matchLevel": "container",
"container": {
"kind": "chapter",
"label": "U.S. Const. art. III",
"childCount": 12,
"children": [
{
"actId": "CONST_US_A3_S1",
"citation": "U.S. Const. art. III, § 1",
"status": "in_force"
}
]
},
"repair": {
"kind": "code_name",
"cited": "Jud. Ct. Acts Law",
"interpretedAs": "N.Y. Judiciary Law § 475",
"alternatives": [
{
"actId": "STATE_NY_FCT_S475",
"citation": "N.Y. Fam. Ct. Act § 475"
}
]
},
"registerReference": {
"citation": "36 Pa. Bull. 510",
"state": "il",
"kind": "page",
"ruleCount": 2
}
},
"processingTimeMs": 420.1,
"creditsConsumed": 6
}Changes
No recorded changes to this operation across all 1 revision of this API.