Cookbook

Worked examples of common requests. Each one is a complete request body for the beta endpoint, POST https://api.retrocast.com/v1-beta/forecast?model=t0-alpha, using the same TsFamilyForecastQuery shape as the Introduction — only the fields each example needs change. The model query parameter is required on every call. Every page ends with a "What comes back" section showing the response.

• Forecast several columns at once — predict sales and returns in the same request.
• Group rows before forecasting — your data is per store, you want a forecast per city.
• Backtest on past dates — re-run the forecast from several points in the past and score it.
• Send a parquet file — upload the data instead of putting rows in the request body.
• Add extra data like weather or prices — attach a second table and match it to yours by key.

Every field used here — and the ones these examples leave out, like hierarchies of covariates — is described in the API Reference. If something doesn't work the way these examples suggest, email [email protected].