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Crossref Licenses API

Endpoints that expose license related data

Crossref Licenses API is one of 8 APIs that Crossref publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

This API exposes 1 JSON Schema definition.

Tagged areas include Licenses. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a JSON-LD context, and 1 JSON Schema.

This API exposes 1 operation across 1 path, and defines 3 schemas. It is described by OpenAPI 3.2.0, at version 3.32.0.

Requests are made against a single base URL, /.

1 operations 1 paths 3 schemas 1 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
3.32.0
Base URL
https://api.crossref.org
Contact
Resource Areas
1

Paths & Operations 1

Across 1 path, the API surfaces 1 operation — 1 GET. Each is listed below with its method, path, parameters, and response codes.

Licenses 1

Endpoints that expose license related data

GET
/licenses
Returns a list of licenses. Querying This endpoint accepts query parameter, which allows for free text querying. The result contains aggregated licenses from the works that match given query. For exa…
5 params → 200

Schemas 3

The contract defines 3 schemas that model the data the API accepts and returns. The most detailed are LicensesMessage (4 properties), Licenses (2 properties), License (2 properties). Each schema is shown below with its type and property counts.

License
object
2 properties 2 required
LicensesMessage
object
4 properties 4 required
Licenses
object
2 properties 2 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

crossref-licenses-api-openapi.yml Raw ↑

Other APIs Crossref publishes across the network.

Crossref Agency API
Crossref Funders API
Crossref Journals API
Crossref Members API
Crossref Prefixes API
Crossref Types API
Crossref Works API
Where this information came from

This is an independent, third-party profile of Crossref Licenses 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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