To use the AdWords API, you need to:
- have a regular Google AdWords account (not my MCC - MCC) with campaigns
- there is a MCC account ... which cannot have a campaign but has access to the API
- link your regular AdWords account with a MCC account
- request access to the API from your MCC account (My Profile section)
- pay per use api for google speed rating
... you can apply for a free use of the API, however it is really cost-related. Here you need to do these stupid tests in order to be recognized as a certified partner and fulfill some other requirements . And yes, you need to pay for these tests (the last time I checked, it was $ 50 per test, there are about 4 for AdWords, I donβt know how much you need to go to get the certificate).
PS: these 2 accounts (AdWords and MCC) cannot be combined, and for some reason only MCC has access to the API ... wierd, but it goes "by design" in accordance with API support (I canβt find a link to this moment).
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