Specter backend groups let you run providers in fallback (try in order), parallel (call all and merge outcomes), or split (weighted A/B) mode. A member can also run in shadow mode, where it executes and its result is recorded but doesn't affect the live decision.

That means you can test a new provider against real traffic before trusting it, then promote or swap it by configuration – without touching your integration or exposing customers to an unproven model.

→ See backend groups and shadow mode