Base URL to use?

I'm trying to use the Swagger UI at

https://api.setlist.fm/docs/1.0/ui/index.html

I put in my API Key in upper right corner, but I am unclear on what base URL
to use before /1.0

I'm getting errors for these samples I tried:

https://api.setlist.fm/docs/1.0/user/bamjuggler/attended
https://setlist.fm/1.0/user/bamjuggler/attended
https://setlist.fm/rest/1.0/user/bamjuggler/attended

What is way to get the Swagger UI to work ?

What is way to get the Swagger UI to work ?

Adding the API key in the upper right corner and clicking “Explore” is the first step. After that, scroll down and click on any API endpoint to try it. There's a list of input fields to fill the parameters in and a “Try it out!” button to send the request. After that you'll see the API request that got sent along with the full URL.