How to Choose the Best Programming API in 2026
There are 5 Programming APIs in our directory. Of these, 1 require no authentication, making them ideal for quick prototyping. 1 are rated beginner-friendly.
Last updated: April 2026
Quick Comparison: Top 5 Programming APIs
| Name | Auth | HTTPS | CORS | Difficulty |
|---|---|---|---|---|
| Codeforces | API Key | ✓ | ? | Intermediate |
| Hackerearth | API Key | ✓ | ? | Intermediate |
| Judge0 CE | API Key | ✓ | ? | Intermediate |
| KONTESTS | No Auth | ✓ | ? | Beginner |
| Mintlify | API Key | ✓ | ✓ | Intermediate |
Free Programming APIs (No Auth)
These APIs require no API key or signup. Start using them immediately.
Try It in 5 Minutes: KONTESTS
Quick implementation example using KONTESTS.
Using curl
curl https://kontests.net/api
JavaScript
// ⚠️ Note: This URL may be a documentation page. Check official docs for actual API endpoint.
const url = "https://kontests.net/api";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); New to APIs? Read our Getting Started Guide →
Frequently Asked Questions
How many Programming APIs are available?
There are 5 Programming APIs in our directory as of 2026.
Are there free Programming APIs?
Yes, 1 Programming APIs require no authentication and are completely free to use.
What is the easiest Programming API to use?
KONTESTS is one of the easiest to get started with. It is rated as beginner-level and requires no authentication.
Do I need an API key for Programming APIs?
It depends. 1 APIs need no authentication, 4 require an API key, and 0 use OAuth.