> For the complete documentation index, see [llms.txt](https://sestra.gitbook.io/sestra-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sestra.gitbook.io/sestra-whitepaper/workflow-and-overview/system-overview.md).

# System Overview

Sestra operates between API providers and external verification systems. It:

* creates access sessions
* verifies fulfillment signals
* grants temporary access
* expires sessions automatically

Sestra does not:

* store users
* process payments
* run workloads