I’m getting a persistent 429 error when calling generateContent (model: gemini-3.5-flash-lite) via Firebase AI Logic:
Your prepayment credits are depleted. Please go to AI Studio at https://ai.studio/projects to manage your project and billing.
Project ID: psychoquest-c4d..
This has been happening consistently for several days now (first noticed ~August 3, still occurring as of today). Things I’ve already checked/ruled out:
The project is confirmed on the free tier (“Niveau sans frais” / no-fee tier) in AI Studio’s Dépenses (Spend) page.
Monthly spend cap shows €0.00, and the usage dashboard shows “No usage data available” for the last 28 days — meaning even the failed calls aren’t being logged as real usage/attempts.
I have not exceeded any RPM/TPM/RPD quota — this is a low-traffic personal project with occasional test calls, nowhere near free-tier limits.
I recently added a payment method to the Cloud Billing account specifically to test whether a missing billing account was the cause — retested immediately after, got the exact same 429 error.
This looks like a billing-sync issue on Google’s side rather than an actual quota/rate-limit problem, since no real usage or rate-limit breach is showing anywhere on my end. Could someone take a look at project psychoquest-c4d6d and see what’s going on? Happy to provide any additional details needed.