My Gemini API project returns HTTP 429 RESOURCE_EXHAUSTED (“Your prepayment credits are depleted”) on every request, even though I have a funded billing account.
-
Billing account ID: 0155C2-BA1358-18E9..
-
Project ID: gen-lang-client-06128501.. (BOT EnvixAGV - Boletos)
-
Region/currency: Brazil (BRL)
On May 12, 2026 I made a manual prepayment of R$ 40.00 (Mastercard ••6039, ref. CLOUD 3K5QXM). My actual usage this period is only a few cents (~R$ 0.44). The Cloud Billing transactions page still shows this credit (balance −R$ 39.56 in the “Postpay: Google Cloud services” tab), but the AI Studio → Gemini API Billing page shows a prepay credit balance of R$ 0.00 and “no transactions”. The balance was visible there before and disappeared.
I already tried unlinking and re-linking the billing account to the project — no effect. The API key authenticates fine (models.list works); only paid generation fails with 429.
This appears to be the same prepay sync/migration issue several other users have reported this week. Please re-sync / restore my prepay balance. I can provide the invoice and bank proof of the R$ 40 payment on request.