Navigate to the Lists page
Click the drop-down menu next to the list you want to work with, and choose Settings.
Scroll to find the unique List ID field. The string of letters and numbers is the list ID.
Copy the list ID in the field ( you'll need to paste this into Mal's )
Get Your API Key
1. Click your profile name to expand the Account Panel, and choose Account.
2. Click the Extras drop-down menu and choose API keys.
3. Copy an existing API key or click the Create A Key button.
4. Name your key descriptively, so you know what application uses that key.