AdWords API fees are charged to the API Developer Token holder. They are based on a rate of US$0.25 (or local currency equivalent) per 1000 API units consumed. Please review the AdWords API rate sheet for the details.
Advertisers using their own API application in order to advertise their businesses may be eligible for limited free API unit allocations. Agencies and developers of search engine marketing tools can apply for preferred AdWords API pricing to receive free API units.
