Cloud-hosted Swagger UI

i'm a newbie so please forgive me if this is an ignorant question.

We have an application that will soon be exposing a URL that will return the Swagger specification for our application.

What I would like to have, is a single hosted version of Swagger UI that either accepts a URL where it can find the Swagger Specification by a query parameter, or perhaps via a user prompt.  It then retrieves the specification and runs Swagger-UI.

I'd have to think I'm not the first project that wanted something like this.   Is there a prefab project available for tihs?  Or better yet, a hosted solution already available that does this?