Code Execution & Compilers APIs let you add code execution & compilers capabilities without building from scratch. Every entry below is profiled with trust signals — pricing model, authentication requirements, CORS support, rate limits, and live uptime checks — so you can compare options and pick production-safe choices instead of guessing from a link list.
| API | Pricing | Auth | CORS | Health | |
|---|---|---|---|---|---|
| CodeSignal API CodeSignal API: coding assessments, technical interviews, and developer skill benchmarks. | Freemium | API Key | Yes | Profile | |
| Codeforces Get access to Codeforces data | Free | API Key | No | Profile | |
| HackerRank API HackerRank API: coding challenges, contests, developer rankings, and skill certifications. | Freemium | Unknown | Yes | Profile | |
| Hackerearth For compiling and running code in several languages | Freemium | API Key | Yes | Profile | |
| JMESPath Run JMESPath queries on JSON data for filtering, transforming, and extracting results | Free | No | Yes | Profile | |
| Judge0 CE Online code execution system | Freemium | API Key | Yes | Profile | |
| KONTESTS API For upcoming and ongoing competitive coding contests | Unknown | Unknown | Unknown | Profile | |
| Mintlify API For programmatically generating documentation for code | Unknown | API Key | Yes | Profile | |
| PHPhub PHP syntax checker | Free | No | No | Profile | |
| Pythonium Validate Python code syntax | Free | No | No | Profile | |
| Softwium Validate SQL queries | Free | No | No | Profile |
Start with pricing and auth: free tiers and no-auth APIs are fastest to prototype with. Then check CORS if your app calls the API from the browser, and health before you commit — a great API that's been down for a week will block your launch. Each profile below shows all of these signals plus rate limits where documented.