advanced-camera-card/docs/configuration/common/proxy-warning.md

There are security and performance implications to consider before installing hass-web-proxy-integration and using this functionality.

If the hass-web-proxy-integration is not detected, the card will fall back to the original URL unless proxying was explicitly enabled (i.e. set to true), in which case an error will be shown.

Warning

When proxying, the card's ability to ensure caching doesn't interfere with refresh accuracy depends on what is being proxied. Specifically, image based proxying will have less reliable behavior because signed URLs cannot have additional query parameters added without invalidating the signature. The card uses a URL fragment (#_t=...) for cache-busting instead, which does not affect the signature but is less reliable: the fragment is not sent to the server, so the browser may serve a cached response. Reliable refreshing will depend on the source server providing appropriate Cache-Control headers. The Home Assistant companion app's WebView does not re-fetch images when only the fragment changes, so proxied image refreshing will not work in the companion app.