1,426 APIs cataloged · 1,212 responding

Find the Perfect API for Your Next Project

The only API directory that live-tests real endpoints: 271 APIs independently measured with real HTTP requests, the rest scored from metadata — reliability, speed, security & developer experience.

Zero-Config APIs

Perfect for prototypes. No authentication required.

⭐ Beginner's Pick
84 A
Est.

Axolotl API returns random photos and fun facts about axolotls (aquatic salamanders).

No Auth Beginner HTTPS 116ms
⭐ Beginner's Pick
85 A
Measured

Cat Facts delivers random, verified facts about cats via a simple REST API.

No Auth Beginner HTTPS 204ms
79 B
Est.

Cataas provides programmatic access to cat as a service (cats pictures and gifs) via REST API.

No Auth Beginner HTTPS 361ms
⭐ Beginner's Pick
92 A+
Est.

Dog Facts API returns random interesting facts about dogs as plain JSON.

No Auth Beginner HTTPS 38ms
⭐ Beginner's Pick
92 A+
Est.

This Dog Facts API returns random dog facts in clean JSON with no API key required.

No Auth Beginner HTTPS 31ms
⭐ Beginner's Pick
78 B
Est.

The Dog CEO API serves random dog images from the Stanford Dogs Dataset, organized by breed.

No Auth Beginner HTTPS 271ms
⭐ Beginner's Pick
74 B
Est.

FishWatch by NOAA provides sustainability data, habitat info, and images for US fish species.

No Auth Beginner HTTPS 4386ms
⭐ Beginner's Pick
92 A+
Est.

HTTP Cat returns a cat-themed image for any HTTP status code via a simple URL pattern.

No Auth Beginner HTTPS 48ms
⭐ Beginner's Pick
92 A+
Est.

HTTP Dog serves a photo of a dog for every HTTP status code (200, 404, 500, etc.), making it easy to visualize API responses in a fun way.

No Auth Beginner HTTPS 65ms
⭐ Beginner's Pick
90 A+
Est.

MeowFacts returns random, verified facts about cats such as their sleep habits, hunting instincts, and biological quirks.

No Auth Beginner HTTPS 851ms
92 A+
Est.

Movebank is a global database of animal movement and migration tracking data collected by GPS tags and sensors attached to wild animals worldwide.

No Auth Beginner HTTPS 50ms
⭐ Beginner's Pick
92 A+
Est.

PlaceBear generates placeholder bear images at any pixel dimensions you specify, making it easy to fill wireframes and mockups with visually interesting content during development.

No Auth Beginner HTTPS 192ms

Fastest APIs we measured

Median round trip from three real requests to each endpoint, recorded 2026-08-10.

See the full measurement log →
API Category Response Browser CORS Auth
VALR Cryptocurrency 27 ms no key
xkcd Games & Comics 29 ms no none
Nominatim Geocoding 29 ms yes none
FreeToGame Games & Comics 30 ms yes none
Drupal.org Open Source Projects 30 ms yes none
Final Space Video 30 ms yes none
AviationWeather Weather 30 ms no none
GrünstromIndex Environment 31 ms yes none
Chess.com Games & Comics 31 ms yes none
Dev.to Personality 31 ms yes key

API Recipes

All Recipes →

Getting Started

All Tutorials →