In order to simplify everything, we’ve created some screenshots with some explanations;
If you didn’t create a project before, click to the “Create Project” link and create one.
Don’t forget to enable the API usage.
Now, you need to create credentials. Click to the “Create credentials” button then select “API key” option.
We’ll use the api key as a “Browser key”
In the credentials section, you can add your website URLs as a wild cart URL for multiple domains. You can find more info on the Credential screen about how to limit the access of your API key.
Finally, your API key will be created