Open Source Ecosystem APIs let you add open source ecosystem 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 | |
|---|---|---|---|---|---|
| 24 Pull Requests Project to promote open source collaboration during December | Free | No | No | Profile | |
| Countly Countly web analytics | Freemium | No | No | Profile | |
| Creative Commons Catalog Search among openly licensed and public domain works | Free | OAuth | Yes | Profile | |
| Datamuse Word-finding query engine | Free | No | No | Profile | |
| Drupal.org Drupal.org | Free | No | No | Profile | |
| Evil Insult Generator Evil Insults | Free | No | No | Profile | |
| GitHub Contribution Chart Generator Create an image of your GitHub contributions | Free | No | Yes | Profile | |
| GitHub ReadMe Stats Add dynamically generated statistics to your GitHub profile ReadMe | Free | No | No | Profile | |
| License-API REST API for choosealicense.com. Query open-source software licenses by name, permissions, conditions, and limitations. | Free | No | No | Profile | |
| Metabase An open source Business Intelligence server to share data and analytics inside your company | Freemium | No | No | Profile | |
| Shields Concise, consistent, and legible badges in SVG and raster format | Free | No | Yes | 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.