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Crossref REST API

Retrieve scholarly work metadata by DOI from Crossref's public JSON API.

Reviewed

Listing limitations

  • One DOI lookup was checked; completeness and accuracy of publisher-deposited metadata were not independently assessed.

Retrieve work metadata by DOI

DiscoveryText and data

HTTP connection

HTTP · GETRead only

Client fit

Web: documented fit

Assessment and sources

A public DOI lookup is a read-only JSON GET without registration.

HTTP: documented fit

Assessment and sources

Crossref documents unauthenticated public GET access to work metadata by DOI.

Remote MCP: incompatible

Assessment and sources

The documented route is HTTP, not a hosted MCP endpoint.

Preparation

No setup documented

Operation evidence

Action test succeeded · 2026-09-27T12:10:03Z (UTC)

Connection limitations

  • The entry URL instantiates Crossref's /works/{doi} pattern with a DOI from its documentation; substitute the target DOI.
  • The anonymous public pool requires no signup or key. The optional polite pool uses contact email in mailto or an agent header; paid Metadata Plus is a separate route.
  • Respect rate and concurrency limits advertised by response headers, cache results and back off on 429 responses.
  • Most bibliographic metadata is reusable for any purpose; some abstracts may remain copyrighted by publishers or authors. Metadata access does not grant access or reuse rights to the underlying publication.

Setup and endpoint

HTTP · Method: GET · Read only

Endpoint

https://api.crossref.org/works/10.1128/mbio.01735-25

No setup documented

Connection documentation

Recorded checks

Recorded checks

Documentation read — succeeded

Checked (UTC)

Checked URL
https://www.crossref.org/documentation/retrieve-metadata/rest-api/access-and-authentication/
Context
Unauthenticated public HTTPS GET with curl and User-Agent AgentVenuesCatalogReview/0.1 (+https://agentvenues.com/); no account, cookies or API key.
Result
HTTP 200. Reviewed anonymous public, email-identified polite and paid Plus pools, rate/concurrency headers and backoff guidance.
Source
Crossref REST API access and authentication

Connection check — succeeded

Checked (UTC)

Checked URL
https://api.crossref.org/works/10.1128/mbio.01735-25
Context
Unauthenticated public HTTPS GET with curl and User-Agent AgentVenuesCatalogReview/0.1 (+https://agentvenues.com/); no account, cookies or API key.
Result
HTTP 200 JSON returned a work record with DOI 10.1128/mbio.01735-25 and a title. The request used neither mailto, contact email nor a Plus token.

Action test — succeeded

Checked (UTC)

Checked URL
https://api.crossref.org/works/10.1128/mbio.01735-25
Context
Unauthenticated public HTTPS GET with curl and User-Agent AgentVenuesCatalogReview/0.1 (+https://agentvenues.com/); no account, cookies or API key.
Result
HTTP 200 JSON returned a work record with DOI 10.1128/mbio.01735-25 and a title. The request used neither mailto, contact email nor a Plus token.
Action
Retrieve work metadata by DOI · HTTP

Documentation read — succeeded

Checked (UTC)

Checked URL
https://www.crossref.org/documentation/retrieve-metadata/rest-api/
Context
Unauthenticated public HTTPS GET with curl and User-Agent AgentVenuesCatalogReview/0.1 (+https://agentvenues.com/); no account, cookies or API key.
Result
HTTP 200. Reviewed public JSON work lookup, no-signup access and the copyright distinction for abstracts.
Source
Crossref REST API documentation

Documentation sources

Crossref REST API access and authentication

Official source · Reviewed

Read documentation: https://www.crossref.org/documentation/retrieve-metadata/rest-api/access-and-authentication/

Crossref REST API documentation

Official source · Reviewed

Read documentation: https://www.crossref.org/documentation/retrieve-metadata/rest-api/

Resource details and disclosures
Address
https://www.crossref.org/documentation/retrieve-metadata/rest-api/
Resource type
utility
Categories
DiscoveryText and data
Affiliation
unknown
Disclosure
Crossref documents and operates this API; Agent Venues has no declared affiliation.