Is there a way to find which url(s) my pip command will look for when running something like pip install <package>?
You can configure files like .pip/pip.conf and .pypirc to modify that default but I'd like to know if there is a way to know the mirror priority.
Can I look for something specific running a command with the verbose flag (-v)?
The help message for the install command will include the default value next to the --index-url option.
$ pip install -h
...
-i, --index-url <url> Base URL of Python Package Index (default https://pypi.python.org/simple).
...
The message may vary slightly depending on your version of pip. If an alternate address is configured, it will appear in that help message.
$ cat ~/.config/pip/pip.conf
[global]
index-url = https://my.local.mirror.com/simple
$ pip install -h
...
-i, --index-url <url> Base URL of Python Package Index (default https://my.local.mirror.com/simple).
...