Specify "?" and queryparams in Proxy Endpoint BasePath

[tommasopaci]

Hello comunity, I'm still new to Apigee, and I'm trying to setup a Pass-through Proxy endpoint, which holds QueryParams in the BasePath in the format:

/v1/patients?device_Id={{dev}}&devDate={{date}}

but this every time I try to save the Proxy, I get an error indicating:

Invalid base path, reason:"?" character in the base path.

I believe I have to somehow manage this with queryparam but I could not find precise info. Can someone help me?

Thank you all for any help

Tommaso