> ## Documentation Index
> Fetch the complete documentation index at: https://clumio.reclear.io/llms.txt
> Use this file to discover all available pages before exploring further.

# API versions and regional routing

> How resource versions are selected and how a call reaches the right region.

Resources are versioned independently and selected per request; the host you call determines the control plane.

<Note>
  **Prototype page.** This page is included to show where this topic belongs in the proposed
  documentation structure. Its production instructions would be researched, written, and validated
  during an engagement.
</Note>

## Planned coverage

* Accept-header versioning
* Regional base URLs
* Version drift
* Compatibility

## Related pages

* [Clumio REST API](/developer-tools/rest-api)
* [Full API reference](https://api.commvault.com/docs/latest/api/cv/ClumioAPIs/clumio-rest-api/)