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

# v2.1.21

> Helm v2.1.21 changelog - 2026-06-04

<Update label="Bifrost Helm" description="v2.1.21">
  ## Changelog

  * Added `per_user_oauth` and `per_user_headers` to the MCP connection `authType` enum in `values.schema.json` (`bifrost.mcp.clientConfigs[].authType`). These per-user auth modes were already supported by the application but were previously rejected at chart validation time.
</Update>