---
title: ESI
summary: null
url: https://www.fastly.com/documentation/reference/vcl/variables/esi
---

- [beresp.do_esi](https://www.fastly.com/documentation/reference/vcl/variables/esi/beresp-do-esi/)
- [esi.allow_inside_cdata](https://www.fastly.com/documentation/reference/vcl/variables/esi/esi-allow-inside-cdata/)
- [req.esi](https://www.fastly.com/documentation/reference/vcl/variables/esi/req-esi/)
- [req.esi_level](https://www.fastly.com/documentation/reference/vcl/variables/esi/req-esi-level/)
- [req.is_esi_subreq](https://www.fastly.com/documentation/reference/vcl/variables/esi/req-is-esi-subreq/)
- [req.topurl](https://www.fastly.com/documentation/reference/vcl/variables/esi/req-topurl/)