> For the complete documentation index, see [llms.txt](https://docs.tryterra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tryterra.co/faq/help-topics/connecting/setting-up-provider-credentials-bring-your-own-keys/whoop-redirect-url-save-error.md).

# Why can't I save my WHOOP redirect URL?

If the WHOOP developer portal rejects your redirect URL, **check for stray whitespace at the start of the URL**. A leading space reproduces this exact error; removing it lets the URL save.

Note also that [WHOOP](https://docs.tryterra.co/health-and-fitness-api/whoop) app approval is only required once you exceed 10 connected users. Under 10 you can test without approval.