429 "prepayment credits are depleted" on a funded Postpay project — manual billing sync request

Hi, I’m hitting a persistent billing/quota issue that looks like the known
billing-sync bug — could a moderator trigger a manual billing sync for my project?

Symptom
Every Gemini API request fails immediately with:
429 … “Your prepayment credits are depleted. Please go to AI Studio …
gemini-api/docs/billing#prepay.” (status: RESOURCE_EXHAUSTED)
gemini-cli retries 10x with backoff, all 429, then fails.

Why this looks like a stale-billing-state bug
My Cloud Billing account for this project is on Postpay / pay-as-you-go, is
funded (positive credit balance, no outstanding amount, ~EUR 100 headroom before
the billing threshold), and shows a successful manual payment. There is no actual
prepay balance that should be checked or depleted — yet the API keeps returning
the prepay-depleted error. This matches other reports of a stale billing state
after a Prepay/Postpay transition.

Details

  • Project ID: zweites-gehirn-4977..
  • Billing account ID: 01B884-14BBE1-DD0E..
  • Region: Germany (EUR billing)
  • Manual EUR 10 payment landed on July 5; error persists for several hours across
    many requests, independent of model (tested gemini-2.5-flash).

Request
Please trigger a manual billing sync / re-evaluation for this project so the API
recognizes the funded Postpay account. Happy to provide more details via DM.