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OpenLaws

OpenLaws is a Public Benefit Corporation that provides programmatic access to U.S. law text — federal and state statutes, regulations, constitutions, and case law — through a unified Legal Data API. The platform exposes keyword and citation search, hierarchical division retrieval, historical versions with redline comparisons, citation parsing and validation, and deep links to authoritative government sources. Coverage spans 53 U.S. jurisdictions (50 states + D.C. + Puerto Rico + Federal) with more than 4.3 million law sections under a single data model, targeted at RegTech, LegalTech, GRC / IRM, generative AI / RAG, and legal research workloads.

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OpenLaws Legal Data API

The OpenLaws Legal Data API exposes statutes, regulations, constitutions, and case law across 53 U.S. jurisdictions through a unified data model. It supports keyword and BM25 / ...

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opencollection: 1.0.0
info:
  name: OpenLaws API Documentation
  version: 1.0.4
request:
  auth:
    type: bearer
    token: '{{bearerToken}}'
items:
- info:
    name: Jurisdictions
    type: folder
  items:
  - info:
      name: List all Jurisdictions
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions
    docs: Returns all valid jurisdictions, coverage data, and metadata for OpenLaws Jurisdictions
- info:
    name: Law Divisions
    type: folder
  items:
  - info:
      name: Get a specific Law's Root Divisions
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/laws/:law_key/divisions
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
      - name: law_key
        value: ''
        type: path
        description: A unique identifier for OpenLaws Laws. A `law_key` is a combination of a jurisdiction_key and an abbreviation
          of a law type joined by a '-' character.
    docs: Root divisions are top of the document hierarchy for a law. Typically, these documents are Titles or Agency document
      types.
  - info:
      name: Get Division by Jurisdiction and OpenLaws path
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/laws/:law_key/divisions/:path
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
      - name: law_key
        value: ''
        type: path
        description: A unique identifier for OpenLaws Laws. A `law_key` is a combination of a jurisdiction_key and an abbreviation
          of a law type joined by a '-' character.
      - name: path
        value: ''
        type: path
        description: An OpenLaws field that describes the Division's relationship to other documents in the law's hierarchy.
          Combined with the law_key and effective_date_* fields this creates a unique key for Divisions.
    docs: A precise way of retrieving one Division object with its unique path
  - info:
      name: (Enterprise Only) Get a list of Divisions that were created or updated after a date.
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/laws/:law_key/divisions/updates
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
      - name: law_key
        value: ''
        type: path
        description: A unique identifier for OpenLaws Laws. A `law_key` is a combination of a jurisdiction_key and an abbreviation
          of a law type joined by a '-' character.
      - name: updated_after
        value: ''
        type: query
        description: Return list of Divisions updated AFTER this ISO Date (UTC). Date must be within 90 days of the current
          date.
      - name: limit
        value: ''
        type: query
        description: Maximum number of results to return
      - name: page
        value: ''
        type: query
        description: Combines with `limit` to implement cursor-based pagination. This parameter sets the cursor to the next
          page of data.
    docs: This query returns a list of DivisionUpdate objects which are a lightweight subset of the Division. DivisionUpdates
      contain the law_key, path, and effective dates to identify Division which can be queried further for changes. Note that
      changes to Divisions may not be material. For example, the addition of whitespace or correction of a minor typo from
      the source text is considered an update. Pagination is supported using RFC-8288 HTTP Headers (https://datatracker.ietf.org/doc/html/rfc8288).
  - info:
      name: (Enterprise Only) Get a list of Divisions that were created or updated after a date within a subtree of Divisions.
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/laws/:law_key/divisions/:starting_path/updates
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
      - name: law_key
        value: ''
        type: path
        description: A unique identifier for OpenLaws Laws. A `law_key` is a combination of a jurisdiction_key and an abbreviation
          of a law type joined by a '-' character.
      - name: updated_after
        value: ''
        type: query
        description: Return list of Divisions updated AFTER this ISO Date (UTC). Date must be within 90 days of the current
          date.
      - name: starting_path
        value: ''
        type: path
        description: The starting path to traverse down to find updated Divisions.
      - name: limit
        value: ''
        type: query
        description: Maximum number of results to return
      - name: page
        value: ''
        type: query
        description: Combines with `limit` to implement cursor-based pagination. This parameter sets the cursor to the next
          page of data.
    docs: This query returns a list of DivisionUpdate objects within the Division hierarchy beginning at starting_path. DivisionUpdates
      contain the law_key, path, and effective dates to identify Division which can be queried further for changes. Note that
      changes to Divisions may not be material. For example, the addition of whitespace or correction of a minor typo from
      the source text is considered an update. Pagination is supported using RFC-8288 HTTP Headers (https://datatracker.ietf.org/doc/html/rfc82
  - info:
      name: Keyword Search within a Jurisdiction
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/laws/search
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
      - name: query
        value: ''
        type: query
        description: One or more keywords to search by
      - name: type
        value: ''
        type: query
        description: Search type. Default is 'or'.
      - name: with_federal
        value: ''
        type: query
        description: When with_federal=`true` with a state jurisdiction_key argument, the Federal jurisdiction will also be
          included in the search scope.
      - name: limit
        value: ''
        type: query
        description: Maximum number of results to return
    docs: Heuristic keyword search within a specific Jurisdiction (and optionally, federal Laws at the same time with `with_federal`).
      The search scope will include statutes, rules, regulations, and constitutions. See "Keyword Search Case Opinions" for
      case law search.
  - info:
      name: Keyword Search within a Jurisdiction and a specific law_key for that Jurisdiction
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/laws/:law_key/search
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
      - name: law_key
        value: ''
        type: path
        description: A unique identifier for OpenLaws Laws. A `law_key` is a combination of a jurisdiction_key and an abbreviation
          of a law type joined by a '-' character.
      - name: query
        value: ''
        type: query
        description: One or more keywords to search by
      - name: type
        value: ''
        type: query
        description: Search type. Default is 'or'.
      - name: limit
        value: ''
        type: query
        description: Maximum number of results to return
    docs: 'Heuristic keyword search within a specific Jurisdiction and a specific type of law for that jurisdiction, ex: Jurisdiction=TX
      and law_key=TX-CONST (constitution)'
  - info:
      name: Lookup by Jurisdiction and Bluebook legal citation for a statute, regulation, or constitution
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/laws/citations
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
      - name: query
        value: ''
        type: query
        description: Bluebook legal citation for a statute, code, rule, regulation, or constitution
    docs: We highly recommend this method of looking up Divisions when legal citations are available because it is the most
      precise way to identify relevant documents.
- info:
    name: Laws
    type: folder
  items:
  - info:
      name: Get Laws by Jurisdiction
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/laws
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
    docs: Jurisdictions, i.e., California, Texas, Federal, contain many laws, e.g.,  statutes, regulations, court rules, and
      a constitution.
  - info:
      name: Get all Laws
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/laws
    docs: Laws in OpenLaws represent statutes, rules and regulations, and constitutions
- info:
    name: Courts
    type: folder
  items:
  - info:
      name: Get Courts by Jurisdiction
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/courts
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
    docs: Lists all the active and inactive courts for a Jurisdiction. Note that federal bankruptcy courts are separate from
      federal courts.
  - info:
      name: Get single Court
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/courts/:court_key
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
      - name: court_key
        value: ''
        type: path
        description: Unique identifier for a Court. See the /jurisdictions/{jurisdiction_key}/courts endpoint for possible
          values.
    docs: Returns a single court identified by the court_key. Court key is also the unique identifier in the CourtListener
      data set.
- info:
    name: Opinions
    type: folder
  items:
  - info:
      name: Keyword Search Case Opinions
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/opinions/search
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
      - name: query
        value: ''
        type: query
        description: One or more keywords to search by
      - name: type
        value: ''
        type: query
        description: Search type. Default is 'or'.
      - name: with_federal
        value: ''
        type: query
        description: When with_federal=`true` with a state jurisdiction_key argument, the Federal jurisdiction will also be
          included in the search scope.
      - name: filing_start_date
        value: ''
        type: query
        description: Filter opinions to those that were filed on or after this ISO date.
      - name: filing_end_date
        value: ''
        type: query
        description: Filter opinions to those that were filed before or on this ISO date.
      - name: court_keys
        value: ''
        type: query
        description: Comma delimited list of court_keys. See GET /jurisdictions/{jurisdiction_key}/courts for valid court_keys.
          For the FED jurisdiction, 'first_circuit'...'eleventh_circuit', 'dc_circuit', and 'federal_circuit' are also valid
          values which expand to all courts in that circuit.
      - name: limit
        value: ''
        type: query
        description: Maximum number of results to return
    docs: BM25 keyword search of case opinion text.
  - info:
      name: Lookup Case Opinion by Jurisdiction and Bluebook legal citation for a case
      type: http
    http:
      method: GET
      url: https://api.openlaws.us/api/v1/jurisdictions/:jurisdiction_key/opinions/citations
      params:
      - name: jurisdiction_key
        value: ''
        type: path
        description: Two to three letter Jurisdiction Key. `FED` for federal and generally, the postal abbreviation for most
          U.S. states and territories.
      - name: query
        value: ''
        type: query
        description: Bluebook legal citation for a case
    docs: Long form with parties or short form of case citations (volume-number reporter-abbreviation first-page-number) will
      work.
bundled: true