Your account will be charged only for setting a task.
The cost can be calculated on the Pricing page.
Setting ‘Bing Ads Audience Estimation’ Tasks
This endpoint provides estimated audience size for an ad campaign based on specified targeting criteria. It returns data on the total estimated audience, such as suggested bid and budget for an ad campaign and estimated engagement metrics.
This is the Standard method of data retrieval. If you don’t need to receive data in real-time, this method is the best option for you. Set a task and retrieve the results when our system collects them. Execution time depends on the system workload.
If your system requires delivering instant results, the Live method will be a better solution. This method doesn’t require making separate POST and GET requests to the corresponding endpoints.