How to get a customer ID

Sometimes, Amazon may ask for the customer ID (CID) for you or someone testing / using your skill, in order to perform debugging or whitelisting.

Note IN STEP 2 & 3: For customers of other regions such as UK, Germany or any other marketplace, replace amazon.com with amazon.co.uk, amazon.de or your respective amazon marketplace domain as needed. Other steps remain the same.

To get a CID:

1. If the customer in question = you, i.e. the Developer Console account, then you can follow instructions on How to get your vendor ID, which also gives your CID
2. Else, using a computer browser in incognito / private browsing mode, go to http://amazon.com and log in
3. In a new tab, go to http://amazon.com/gp/profile
4. The end of the resulting URL in the address bar (prefixed with amzn1.account.*) is the CID. You can also just grab the full URL