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CourtListener Opinions API

The Opinions API from CourtListener — 2 operation(s) for opinions.

CourtListener Opinions API is one of 21 APIs that CourtListener publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Opinions. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

This API exposes 2 operations across 2 paths, and defines 2 schemas. It is described by OpenAPI 3.2.0, at version 4.4.

Requests are made against 2 base URLs: https://www.courtlistener.com/api/rest/v4, https://www.courtlistener.com/api/rest/v1.

2 operations 2 paths 2 schemas 2 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
4.4
Base URL
https://www.courtlistener.com/api/rest/v4/
Authentication
API Key, HTTP Basic, API Key
Terms of Service
Resource Areas
1

Authentication & Security 3

CourtListener Opinions API declares 3 security schemes for authenticating requests. An API key is passed in the header as Authorization (tokenAuth). It accepts HTTP basic authentication (basicAuth). An API key is passed in the cookie as sessionid (cookieAuth). By default, every request must be authenticated.

  • tokenAuth — Token-based authentication. Format: 'Token '

Paths & Operations 2

Across 2 paths, the API surfaces 2 operations — 2 GET. Each is listed below with its method, path, parameters, and response codes.

Opinions 2
GET
/api/rest/v4/opinions/
List Opinions
listOpinions 4 params → 200401429
GET
/api/rest/v4/opinions/{id}/
Retrieve Opinion
retrieveOpinion 2 params → 200401404429

Schemas 2

The contract defines 2 schemas that model the data the API accepts and returns. The most detailed are Opinion (16 properties), PaginatedResponse (4 properties). Each schema is shown below with its type and property counts.

Opinion
object
Court opinion document
16 properties
PaginatedResponse
object
Standard paginated list response
4 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

court-listener-opinions-api-openapi.yml Raw ↑

Other APIs CourtListener publishes across the network.

CourtListener Alerts API
CourtListener Audio API
CourtListener Citation API
CourtListener Cited By API
CourtListener Cites API
CourtListener Courts API
CourtListener Coverage API
CourtListener Docket Alerts API
CourtListener Docket Entries API
CourtListener Dockets API
CourtListener Financial Disclosures API
CourtListener FJC Database API
Where this information came from

This is an independent, third-party profile of CourtListener Opinions API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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