Developer hit with €54k bill in 13 hours after exposing unrestricted Firebase browser key used by bots to abuse Gemini API; Google denies refund despite anomalous automated traffic

Unexpected €54k billing spike in 13 hours: Firebase browser key without API restrictions used for Gemini requests - Gemini API - Google AI Developers Forum

Unexpected €54k billing spike in 13 hours: Firebase browser key without API restrictions used for Gemini requests - Gemini API - Google AI Developers Forum Google AI Developers Forum Unexpected €54k billing spike in 13 hours: Firebase browser key without API restrictions used for Gemini requests Gemini API gemini-api, gemini, billing zanbezi April 15, 2026, 12:35pm 1 Hello, We are looking for guidance regarding an unexpected €54,000+ Gemini API charge that occurred within a few hours after enabl...