Animals APIs let you add animals capabilities without building from scratch. Every entry below is profiled with trust signals — pricing model, authentication requirements, CORS support, rate limits, and live uptime checks — so you can compare options and pick production-safe choices instead of guessing from a link list.
| API | Pricing | Auth | CORS | Health | |
|---|---|---|---|---|---|
| AdoptAPet API Resource to help get pets adopted | Unknown | API Key | Yes | Profile | |
| Axolotl API Collection of axolotl pictures and facts | Unknown | API Key | No | Profile | |
| Cat Facts Daily cat facts delivered via JSON API. | Free | No | No | Profile | |
| Cat Facts API 2 Random cat facts | Unknown | OAuth | Yes | Profile | |
| Cataas Cat as a Service — random cat images and GIFs. | Free | No | Yes | Profile | |
| Cats Cat images, breeds, and categories from TheCatAPI. | Freemium | API Key | Yes | Profile | |
| Cats API Pictures of cats from Tumblr | Unknown | API Key | No | Profile | |
| Dog Facts API Random dog facts | Unknown | Unknown | Yes | Profile | |
| Dog Pics Dog images from the Stanford Dogs Dataset, searchable by breed. | Free | No | Yes | Profile | |
| Dogs Random dog facts and breed information. MIT licensed. | Free | No | Yes | Profile | |
| HTTP Cat Cat images for every HTTP response status code. | Free | No | No | Profile | |
| HTTP Dog Dog images for every HTTP response status code. | Free | No | No | Profile | |
| IUCN Red List Threatened species data from the IUCN Red List of Threatened Species. | Free | API Key | No | Profile | |
| MeowFacts Random cat facts via simple JSON API. | Free | No | Yes | Profile | |
| Movebank Animal movement and migration tracking data for research. | Free | No | No | Profile | |
| PlaceBear Placeholder bear images by dimensions. | Free | No | No | Profile | |
| PlaceDog Placeholder dog images by dimensions — like placekitten for dogs. | Free | No | No | Profile | |
| RandomDog Random dog images via JSON API. | Free | No | Yes | Profile | |
| RandomDuck Random duck images via JSON API. | Free | No | No | Profile | |
| RandomFox Random fox images via simple JSON API. | Free | No | Yes | Profile | |
| RescueGroups Animal adoption data from rescue organizations worldwide. | Free | No | Yes | Profile | |
| The Dog API Dog breeds, images, and facts for apps and websites. | Freemium | API Key | Yes | Profile | |
| WoRMS World Register of Marine Species — authoritative taxonomy and nomenclature for marine organisms. | Free | No | Yes | Profile | |
| eBird Recent and notable birding observations from eBird, powered by Cornell Lab. | Free | API Key | No | Profile | |
| xeno-canto Community-driven database of bird sound recordings from around the world. | Free | No | No | Profile |
Start with pricing and auth: free tiers and no-auth APIs are fastest to prototype with. Then check CORS if your app calls the API from the browser, and health before you commit — a great API that's been down for a week will block your launch. Each profile below shows all of these signals plus rate limits where documented.