Executes a forecast using the specified targeting modules, time range, and line item type. Returns daily and weekly predicted impression values with confidence bounds. Rate limited to 10 requests per minute per account. Use GET /forecasting/keys and GET /forecasting/values to discover valid targeting options before calling this endpoint.
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Forecast completed successfully. Result contains support_set_id, predicted_values_daily (array of daily intervals with prediction, upper_bound, and lower_bound), and predicted_values_weekly (aggregated).
Request validation failed. Possible causes: invalid targeting module, invalid line_item_type, start_time in the past, start_time after end_time, invalid deal IDs, or upstream forecast service error.
Authentication credentials are missing or invalid.
Permission denied.
Rate limit exceeded. Default limit is 10 requests per minute per account.
The upstream forecast service did not respond within 60 seconds. Please try again later.