Amazon Product API in Zapier: Keep the Key Out of the Zap
Call the SellerMagnet API from a Zap without leaving the X-Api-Key header sitting in a Zap step's plaintext fields: set it once in Storage by Zapier instead, then fetch it at run time from a Code by Zapier Python step that also adds the series' billing-aware retry and a StoreClient dedup against Zapier's own "Replay entire Zap run" double-billing trap.