I am a merchant, I can't find my merchant ID or API key Your merchant ID and API key are in the Merchant Portal under the Add Zip as a Payment Options tab. If you experience any difficulties, please email our Merchant Experience team. Related articles What’s a customer's spending limit? I am a merchant, what's the Zip widget? I am a merchant, how does Zip integration work? How do I shop online using the Zip app? How do I change a payment date?