Your account will be charged for each request.
The cost can be calculated on the Pricing page.
Setting Live ‘Google Ads Search Volume’ Tasks
Note that Google Ads Keywords Data API is based on the latest version of the Google Ads API that has replaced legacy Google AdWords API. If you’re using DataForSEO Google AdWords API, you need to upgrade to DataForSEO Google Ads API.
This endpoint will provide you with search volume, monthly searches, competition, and other related data for up to 1000 keywords in a single request.
Note: you can send no more than 12 requests per minute per account using Google Ads Live endpoints.