CourtListener

CourtListener Opinion Clusters API

The Opinion Clusters API from CourtListener — 2 operation(s) for opinion clusters.

Documentation GitHub OpenAPI

Operations 2

GET /api/rest/v4/clusters/ List Opinion Clusters #

GET /api/rest/v4/clusters/{id}/ Retrieve Opinion Cluster #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: CourtListener REST Alerts Opinion Clusters API
  description: REST API providing programmatic access to US court opinions, PACER docket data, judge records, financial disclosures, oral argument audio, citation lookup and network analysis, search alerts, and case visualizations. Operated by the Free Law Project.
  version: '4.4'
  contact:
    name: Free Law Project
    url: https://free.law/contact/
    email: info@free.law
  license:
    name: Creative Commons Attribution-ShareAlike 4.0 International
    url: https://creativecommons.org/licenses/by-sa/4.0/
  termsOfService: https://free.law/terms/
servers:
- url: https://www.courtlistener.com/api/rest/v4
  description: CourtListener REST API v4 (current)
- url: https://www.courtlistener.com/api/rest/v1
  description: CourtListener REST API v1 (legacy)
security:
- tokenAuth: []
tags:
- name: Opinion Clusters
paths:
  /api/rest/v4/clusters/:
    get:
      summary: List Opinion Clusters
      description: Groups of related opinions from a single case
      operationId: listOpinionClusters
      tags:
      - Opinion Clusters
      parameters:
      - $ref: '#/components/parameters/format'
      - $ref: '#/components/parameters/cursor'
      - $ref: '#/components/parameters/order_by'
      - name: fields
        in: query
        description: Comma-separated list of fields to include in the response
        required: false
        schema:
          type: string
      responses:
        '200':
          description: Paginated list of opinion clusters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PaginatedResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
  /api/rest/v4/clusters/{id}/:
    get:
      summary: Retrieve Opinion Cluster
      description: Retrieve a single opinion cluster by ID
      operationId: retrieveOpinionCluster
      tags:
      - Opinion Clusters
      parameters:
      - name: id
        in: path
        required: true
        description: Unique identifier for the opinion cluster
        schema:
          type: integer
      - $ref: '#/components/parameters/format'
      responses:
        '200':
          description: Single opinion cluster record
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/RateLimited'
components:
  responses:
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            type: object
            properties:
              detail:
                type: string
    Unauthorized:
      description: Authentication required
      content:
        application/json:
          schema:
            type: object
            properties:
              detail:
                type: string
    RateLimited:
      description: Rate limit exceeded
      content:
        application/json:
          schema:
            type: object
            properties:
              detail:
                type: string
  parameters:
    cursor:
      name: cursor
      in: query
      description: Cursor for pagination
      required: false
      schema:
        type: string
    order_by:
      name: order_by
      in: query
      description: Field to order results by
      required: false
      schema:
        type: string
    format:
      name: format
      in: query
      description: Response format (json, xml, html)
      required: false
      schema:
        type: string
        enum:
        - json
        - xml
        - html
  schemas:
    PaginatedResponse:
      type: object
      description: Standard paginated list response
      properties:
        count:
          type: integer
          description: Total number of results
        next:
          type:
          - string
          - 'null'
          format: uri
          description: URL to next page
        previous:
          type:
          - string
          - 'null'
          format: uri
          description: URL to previous page
        results:
          type: array
          items: {}
  securitySchemes:
    tokenAuth:
      type: apiKey
      in: header
      name: Authorization
      description: 'Token-based authentication. Format: ''Token <your_token>'''
    basicAuth:
      type: http
      scheme: basic
    cookieAuth:
      type: apiKey
      in: cookie
      name: sessionid
externalDocs:
  description: CourtListener API Documentation
  url: https://wiki.free.law/c/courtlistener/help/api/rest/v4/overview