Hi Barbora,
A developer token is required to perform any operation against an account using the AdWords API,
so you will need to go through the
signup process and fill out the
token application form. There are two types of access levels for using API which are outlined in our
FAQ's.
Please make sure you watch for the email in the follow-up form described in
step 2. A common cause of delays in the application process is that applicants don't complete that step.
Cheers,
Raghavendra, AdWords API Team.