"sapi/v1/userDataStream" not working

the endpoint “api/v3/userDataStream” working fine. However,
“sapi/v1/userDataStream” is not found. Am I missing something in the docus?

Which environment (production or testnet) and method did you try? It has POST, PUT and DELETE.

production I suppose (I can fire trades) where to check it? and I am using POST. Anyways, using PUT didn’t change anything.

The API looks fine. Please check if you attach the proper X-MBX-APIKEY, thanks.