ztfquery enables programmatic access to data products from the Zwicky Transient Facility. The package queries and downloads images, catalogs, metadata, and observing logs through the IRSA interface. It includes tools to retrieve light curves and source information from ZTF services and to access selected follow-up data products. ztfquery organizes retrieved data into analysis-ready formats and supports integration with standard Python workflows for time-domain astronomy.

AMPEL provides an analysis framework for high-throughput surveys and is suited for streamed data. The package combines the functionality of an alert broker with a generic framework capable of hosting user-contributed code; it encourages provenance and keeps track of the varying information states that a transient displays. The latter concept includes information gathered over time and data policies such as access or calibration levels.