Programming APIs

Programming languages and tools

4 APIs in this category · last checked 2 October 2026
4
APIs listed
0
need no API key (0%)
0
CORS enabled (0%)
4
HTTPS (100%)

This directory lists 4 programming APIs. Use the filters below to narrow by authentication, HTTPS support and CORS. Every entry shows whether it needs authentication, serves over HTTPS and allows cross-origin requests, so you can pick one that fits your stack before you read a single doc page.

Showing 4 of 4 APIs

Judge0 CE

Compiles and runs submitted code in over 60 languages inside a sandboxed judge system, authenticated with an X Auth Token header, with a free Basic plan on RapidAPI.

Auth: apiKey HTTPS CORS: Unknown

Codeforces

Returns Codeforces contest schedules, problem sets, and user rating history as JSON. Most read only methods work without a key, while privileged calls need a signed apiKey and secret.

Auth: apiKey HTTPS CORS: Unknown

Mintlify

Lets you trigger documentation deployments, manage pages, and pull analytics for a Mintlify powered docs site. The REST API is gated behind the paid Pro or Enterprise plan.

Auth: apiKey HTTPS CORS: Unknown

Hackerearth

Compiles and executes code in 24 languages asynchronously, returning verdicts like accepted or time limit exceeded. Requires a registered client secret key, with capped free usage.

Auth: apiKey HTTPS CORS: Unknown

Best Programming APIs for Developers

A programming API allows developers to execute code in multiple languages, perform syntax highlighting, run static analysis, and access programming language metadata without setting up complex infrastructure. These APIs are the backbone of online IDEs, coding challenge platforms, and developer education tools.

Judge0 CE is the easiest pick for a code runner, covering 60 plus languages in a sandboxed judge with a free RapidAPI Basic plan, good for an online IDE or auto grader. HackerEarth's compiler API runs a similar asynchronous model across 24 languages but needs a registered client secret and caps free requests, fitting teams already on HackerEarth hiring challenges.

Codeforces exposes contest schedules, problem sets, and rating history free, with no signup for read only calls, making it the pick for competitive programming trackers. Mintlify's REST API suits documentation teams who want to trigger deploys and pull analytics, but it only unlocks on a paid Pro or Enterprise plan. Watch for the split between open read endpoints and ones needing a signed key before you ship.

What to check before you pick one

  • Language support: Verify the API supports all programming languages your platform targets, including version-specific runtimes.
  • Sandbox security: Code execution APIs must isolate user code in secure sandboxes to prevent malicious code from accessing host resources.
  • Execution timeout: Configurable timeouts prevent infinite loops from consuming resources and ensure consistent response times.

Frequently Asked Questions

What are programming APIs?

Programming APIs provide services for code execution in multiple languages, syntax highlighting, static analysis, compiler access, documentation generation, and programming language data for building developer tools.

Is there a free code execution API?

Yes. Judge0 and Piston are free open source code execution APIs that support dozens of programming languages. They sandbox code execution in isolated containers for security.

Can I run code in the browser using an API?

Yes. By integrating a code execution API like Judge0 or Piston with your frontend, you can accept code input from users, send it to the API, and display the output in real time in the browser without any server-side code runner.

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