Unpaywall

Open-access status and legal full-text links for scholarly articles.

Unpaywall API is a free Science & Math API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.

Authentication: None required
HTTPS: Yes
CORS: Yes
Category: Science & Math

Visit documentation ↗unpaywall.org

About Unpaywall

Provider: Unpaywall
Website: unpaywall.org ↗

Details from unpaywall.org.

Unified API suite · now live

Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.

Get your free API key→Free tier on every API

Unpaywall API alternatives

TLE

Satellite information

No authHTTPSNo CORS

USGS Earthquake Hazards Program

Earthquakes data real-time

No authHTTPSNo CORS

Times Adder

With this API you can add each of the times introduced in the array sended

No authHTTPSNo CORS

USGS Water Services

Water quality and level info for rivers and lakes

No authHTTPSNo CORS

Tallytopia

Calculators for finance, health, math, space and sports with step-by-step results

No authHTTPSCORS

VedIntel™ AstroAPI

Vedic astrology computation — birth charts, dashas, panchang, AI narratives

apiKeyHTTPSCORS

Unpaywall API FAQ

Who provides the Unpaywall API?

The Unpaywall API is provided by Unpaywall (unpaywall.org).

Is the Unpaywall API free?

Yes. The Unpaywall API is listed in the Science & Math category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.

Does the Unpaywall API require an API key?

No. The Unpaywall API requires no authentication, so you can start making requests without signing up.

Can I call the Unpaywall API from the browser?

Yes. The Unpaywall API supports CORS, so front-end JavaScript can call it directly.

Does the Unpaywall API support HTTPS?

Yes. The Unpaywall API is served over HTTPS, so it's safe to use in production.