IUCN API alternatives

IUCN Red List of Threatened Species. If it doesn't fit your project, here are the 10 best free Animals APIs to use instead in 2026, out of 23 in the directory.

For reference, IUCN API: HTTPS.

1. 1

   Dog Facts API

   Online · 342 ms

   Random dog facts. A free animals API by dukengn.github.io.

   • No API key needed
   • Fast: 342 ms response
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2

   Dog Facts API

   Online · 356 ms

   Random facts of Dogs. A free animals API by Dog API by kinduff.

   • No API key needed
   • Fast: 356 ms response
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   Cat Facts API

   Online · 556 ms

   Random cat facts. A free animals API by Cat Facts API.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4

   Dogs API

   Online · 523 ms

   Based on the Stanford Dogs Dataset.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
5. 5

   HTTP Cat API

   Online · 683 ms

   Cat for every HTTP Status.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
6. 6

   HTTP Dog API

   Online · 779 ms

   Dogs for every HTTP response status code.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
7. 7

   PlaceDog API

   Online · 860 ms

   Placeholder Dog pictures. A free animals API by place.dog.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
8. 8

   Cat Facts API

   Online · 281 ms

   Daily cat facts. A free animals API by cat-facts.

   • No API key needed
   • Fast: 281 ms response
   • HTTPS

   No authHTTPSNo CORS
9. 9

   RandomDog API

   Online · 1405 ms

   Random pictures of dogs. A free animals API by random.dog.

   • No API key needed
   • Returns JSON at its URL
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
10. 10

    FishWatch API

    Online · 2075 ms

    Information and pictures about individual fish species.

    • No API key needed
    • Callable from the browser (CORS)
    • HTTPS

    No authHTTPSCORS

IUCN API vs alternatives

IUCN API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
IUCN	Required	Yes	No	Up	789 ms	Not rated
Dog Facts	No	Yes	Yes	Up	342 ms	Not rated
Dog Facts	No	Yes	Yes	Up	356 ms	Not rated
Cat Facts	No	Yes	Yes	Up	556 ms	Not rated
Dogs	No	Yes	Yes	Up	523 ms	Not rated
HTTP Cat	No	Yes	Yes	Up	683 ms	Not rated
HTTP Dog	No	Yes	Yes	Up	779 ms	Not rated
PlaceDog	No	Yes	Yes	Up	860 ms	Not rated
Cat Facts	No	Yes	No	Up	281 ms	Not rated

See also: best Animals APIs · all Animals APIs