I've done some research for you and some ideas could be:
* urllib may cause problems and curl could solve this
* some calls may work only on
https://miningpoolhub.com/index.php?page=api... instead of coin's URL
You can read more about my findings
here.
Edit: I made even more tests, but only from browser and my advises are
1. Try without id first, it may work.
2. Try with your user id [dot] worker name.
Both of these attempts have returned a json for me, not the usual "access denied".