API credentials are necessary to use Matecat RestAPIs and integrate Matecat into your translation management system or any other applications (e.g. Wpml).
You can generate your own API credentials from your personal profile panel.
Click on Generate
An API key will be generated and a warning message will appear. The secret key is indeed visible only when you generate it for the first time. Make sure to copy it, since it cannot be recovered later.
This is how the panel appears when an API key is associated with your account.
You can delete at any time your API key, just clicking on Delete.
Once you have your API credentials you can start using API to create and check your translation projects. Here you can find info on how to do that.