Open source apis projects
Every project in the registry tagged apis, ranked by real GitHub adoption.
Visual workflow automation with code flexibility and AI agents
🦍 The API and AI Gateway
The OpenAPI Specification Repository
A tool for mocking HTTP services
The first AI agent that builds permissionless integrations through reverse engineering platforms' internal APIs.
Blazing-fast API gateway with linear scalability
AI-powered automation that lives in your Slack workspace
Related tags
Frequently asked questions
How many open source apis projects are there?
This registry tracks 7 projects tagged apis, with 296,163 GitHub stars between them. The most-adopted is n8n at 204,887 stars.
Are these apis projects free to use?
Yes — 6 of the 7 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which apis project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these apis projects still maintained?
6 of the 7 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.