How to enable the API and where to retrieve the API Key
posted this on July 1, 2010, 18:35
API Integration is disabled by default.
To enable it go to My Account => API Access and select Yes for the "Enable API Access" option. On the same page you'll also find your "Secret API Key".
As explained in the documentation, you'll need to pass the API key in all your API calls. It's a unique key that identifies you, and also serves as a sort of password to give you access to the API functions. Because of this. you must keep it secret.
Also keep in mind that you should make all the API calls under HTTPS, so that all the input parameters are encrypted and cannot be sniffed.