(For Merchants) Where can I locate my Merchant ID / API key? You can find your Merchant ID and API key in the Merchant Portal under the Add Zip as a Payment Options tab. Should you require further assistance or have questions, you can email our Merchant Experience team. Related articles Why have I received the message "Identify verification failed" when signing up? (For Merchants) How will my business benefit from Zip? (For Merchants) What is Zip and how does it work?