The Demand Result Forecast method uses GET to obtain the forecasting result of an on-demand forecasting job. You need to send the forecast_id (generated when requesting this on-demand forecasting) as parameter which value is the job_id you received when you made your on-demand forecasting request.
If you use simple for the type parameter when you made your on-demand forecasting request, this method returns only these forecasting metrics: Forecasted Final Delivery Impressions (FFDI), Forecast Final Delivery Rate (FFDR), and Net Unreserved Available (NUA).
If you provided one webhook (AWS S3 information) to us before, the Simplified On-Demand result will be also sent to the S3 bucket.
You can use this method to poll periodically, which can be helpful since the time it takes to run on-demand forecasting may vary from seconds to minutes. If the on-demand forecasting conitnues processing with no result available, this method will return a 422 error.