The Mortgage Coach API Key found in your profile settings is customized to your account at the user level. This key can only be used for integrations that allow you to self-serve and enable.
For example, Jungo, Homebot and LoanSense are a few integrations that will allow users to connect their Mortgage Coach solution to their platforms.
To locate your Mortgage Coach API key in Mortgage Coach, click on the Settings tab in the upper right corner. Next, click on the Contact option in the left navigation menu. Scroll down until you find the Mortgage Coach API Key.