Is cursor autocomplete and apply feature locked to pro subscription?

So Is the cursor autocomplete and apply feature locked to pro subscription?
I am using my own Anthropic Claude API key and and first the apply changes didn’t work with the error message that this API key type is not supported.
Then today i got the error message pro subscription is needed for autocomplete or i have to turn it off and after that autocomplete stopped working.
Can anyone confirm that is pro subscription is mandatory to use this features even though while using own API key.
I couldn’t find any definite answer anywhere. Also seems other people also facing same issue and few issues raised in github with no reply.

yes Apply does not work with API key