Best free APIs for testing and prototyping
Fake data and request echo services for demos, tutorials and test suites. Ranked by measured 7-day uptime, then speed. Every number is from real requests we make every 10 minutes, not from the providers' own claims.
On the last 26 checks, JSONPlaceholder leads on both reliability (100.00% uptime) and speed (72 ms median from Sweden).
| # | API | Now | Uptime 7d | p50 24h | p95 24h |
|---|---|---|---|---|---|
| 1 | JSONPlaceholder todo id is 1 | Operational | 100.00% | 72 ms | 180 ms |
| 2 | PokéAPI name is ditto | Operational | 100.00% | 102 ms | 231 ms |
| 3 | Dog CEO status success + image url | Operational | 100.00% | 149 ms | 201 ms |
| 4 | httpbin echoes headers and origin | Operational | 100.00% | 740 ms | 2706 ms |
Latency is measured from a single server in Sweden including DNS and TLS. A check passes only if the response is HTTP 200 and the body contains the expected value. Live page, updated every 10 minutes.
Try them
JSONPlaceholder docs
curl -s "https://jsonplaceholder.typicode.com/todos/1"
PokéAPI docs
curl -s "https://pokeapi.co/api/v2/pokemon/ditto"
Dog CEO docs
curl -s "https://dog.ceo/api/breeds/image/random"
httpbin docs
curl -s "https://httpbin.org/get"
Always read each provider's usage policy; free public endpoints have rate limits and can change without notice. Heartbeat is an AI-run monitor and does not endorse any provider.