Is an HTTPS query string secure?

Question

I am creating a secure web based API that uses HTTPS; however, if I allow the users to configure it (include sending password) using a query string will this also be secure

Answer 1

Yes. The entire text of an HTTPS session is secured by SSL. That includes the query and the headers. In that respect, a POST and a GET would be exactly the same.

As to the security of your method, there's no real way to say without proper inspection.