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CitedBy logo

Which AI crawlers can read a site: robots.txt and server answer for each.

CitedBy API is a free Development 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
Development
Uptime (30 days)
100%
Visit documentation ↗citedby.eu

Online · 1624 msTested Nov 15, 2026 · checked dailyIs it down? Status & uptime

About CitedBy

A free JSON API that says which AI crawlers can read a site: robots.txt and server answer for each one. No key, CORS open, OpenAPI spec.

Provider
CitedBy
Website
citedby.eu ↗

Details from citedby.eu.

Key facts

  • No API key needed
  • 100% uptime (30 days)
  • Callable from the browser (CORS)
  • HTTPS
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CitedBy API FAQ

Who provides the CitedBy API?

The CitedBy API is provided by CitedBy (citedby.eu). A free JSON API that says which AI crawlers can read a site: robots.txt and server answer for each one. No key, CORS open, OpenAPI spec.

Is the CitedBy API free?

Yes. The CitedBy API is listed in the Development 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 CitedBy API require an API key?

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

Can I call the CitedBy API from the browser?

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

Does the CitedBy API support HTTPS?

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

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Show that CitedBy is listed on Public APIs. The badge displays its developer rating once it has one.

CitedBy on Public APIs

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[![CitedBy on Public APIs](https://publicapis.lol/badge/citedby.svg)](https://publicapis.lol/apis/citedby)

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