| AdoptAPet | Resource to help get pets adopted | apiKey | ✓ | ✓ | |
| Axolotl | Collection of axolotl pictures and facts | No | ✓ | ✗ | |
| Cat Facts | Daily cat facts | No | ✓ | ✗ | |
| Cataas | Cat as a service (cat pictures and GIFs) | No | ✓ | ✗ | |
| Cats | Pictures of cats from Tumblr | apiKey | ✓ | ✗ | |
| Dog Facts | Random dog facts | No | ✓ | ✓ | |
| Dog Facts (Kinduff) | Random facts about dogs | No | ✓ | ✓ | |
| Dogs | Based on the Stanford Dogs Dataset | No | ✓ | ✓ | |
| eBird | Retrieve recent or notable birding observations within a region | apiKey | ✓ | ✗ | |
| FishWatch | Information and pictures about individual fish species | No | ✓ | ✓ | |
| HTTP Cat | Cat images for every HTTP status code | No | ✓ | ✓ | |
| HTTP Dog | Dog images for every HTTP status code | No | ✓ | ✓ | |
| IUCN | IUCN Red List of Threatened Species | apiKey | ✗ | ✗ | |
| MeowFacts | Get random cat facts | No | ✓ | ✗ | |
| Movebank | Movement and migration data of animals | No | ✓ | ✓ | |
| Petfinder | Resource dedicated to helping pets find homes | apiKey | ✓ | ✓ | |
| PlaceBear | Placeholder bear pictures | No | ✓ | ✓ | |
| PlaceDog | Placeholder dog pictures | No | ✓ | ✓ | |
| PlaceKitten | Placeholder kitten pictures | No | ✓ | ✓ | |
| RandomDog | Random pictures of dogs | No | ✓ | ✓ | |
| RandomDuck | Random pictures of ducks | No | ✓ | ✗ | |
| RandomFox | Random pictures of foxes | No | ✓ | ✗ | |
| RescueGroups | Pet adoption and rescue information | No | ✓ | ? | |
| Shibe Online | Random pictures of Shiba Inu, cats, or birds | No | ✓ | ✓ | |
| The Dog | Public service API about dogs — perfect for apps or websites | apiKey | ✓ | ✗ | |
| Xeno-canto | Bird recordings and species information | No | ✓ | ? | |
| Zoo Animals | Facts and pictures of zoo animals | No | ✓ | ✓ | |