KONTESTS API alternatives

For upcoming and ongoing competitive coding contests. If it doesn't fit your project, here are the 4 best free Programming APIs to use instead in 2026, out of 4 in the directory.

For reference, KONTESTS API: No API key needed · HTTPS.

1
Judge0 CE API
Online · 596 ms
Online code execution system. A free programming API by Judge0 CE.
- HTTPS
apiKeyHTTPSCORS ?
2
Mintlify API
Online · 1227 ms
For programmatically generating documentation for code.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
3
Codeforces API
Online · 479 ms
Get access to Codeforces data.
- HTTPS
apiKeyHTTPSCORS ?
4
Hackerearth API
Online · 1521 ms
For compiling and running code in several languages.
- HTTPS
apiKeyHTTPSCORS ?

KONTESTS API vs alternatives

KONTESTS API compared with its alternatives
API	API key	HTTPS	CORS	Uptime	Response	Rating
KONTESTS	No	Yes	Unknown	Down	–	Not rated
Judge0 CE	Required	Yes	Unknown	Up	596 ms	Not rated
Mintlify	Required	Yes	Yes	Up	1227 ms	Not rated
Codeforces	Required	Yes	Unknown	Up	479 ms	Not rated
Hackerearth	Required	Yes	Unknown	Up	1521 ms	Not rated

Head-to-head comparisons

KONTESTS API alternatives FAQ

What is the best free alternative to the KONTESTS API in 2026?

The top-ranked free alternatives to the KONTESTS API are Judge0 CE API, Mintlify API and Codeforces API, all in the Programming category. Rankings combine access (API key, HTTPS, CORS), daily uptime checks and developer ratings.

Is there a KONTESTS API alternative I can call from the browser?

Mintlify API support CORS, so front-end JavaScript can call them directly.

How many Programming APIs are similar to the KONTESTS API?

The directory lists 4 other free Programming APIs. This page compares the top ones side by side.

Judge0 CE API

Mintlify API

Codeforces API

Hackerearth API