MyAffiliates affiliate programs all support API access. To set up and extract your API key enter Account > Authorisation
Under OAuth2 Clients input your Client name (this can be anything) and press Create new client. The page will refresh and show you the Client Identifier and Client secret.
These two keys need to be inputted into your account on Routy. To do this press Actions > Account Profile on the account page. You will then be able to input the Client Identifier and Secret, as shown below: