# facil.io

> facil.io is an evented network library and web framework in C: HTTP and WebSocket servers, Pub/Sub, Redis, JSON and TLS, built for high concurrency.

> Source code: [boazsegev/facil.io](https://github.com/boazsegev/facil.io) — the classic framework (0.7.x and earlier) · [facil-io/cstl](https://github.com/facil-io/cstl) — the 0.8.x line (fio-stl).

facil.io documentation is versioned. Every documentation page is also available as markdown by appending `index.md` to its URL. Each version offers a complete plain-text dump (`llms-full.txt`) for ingestion.

## Documentation versions

- [facil.io 0.8.x (upcoming release)](https://facil.io/0.8.x/llms.txt) — page index; [full text](https://facil.io/0.8.x/llms-full.txt)
- [facil.io 0.7.x (stable release)](https://facil.io/0.7.x/llms.txt) — page index; [full text](https://facil.io/0.7.x/llms-full.txt)
- [facil.io 0.6.x (legacy release)](https://facil.io/0.6.x/llms.txt) — page index; [full text](https://facil.io/0.6.x/llms-full.txt)

## Entry points

- [Homepage (markdown)](https://facil.io/index.md)
- [Change Log](https://facil.io/changelog/)
- [Sitemap](https://facil.io/sitemap.txt)