429 RESOURCE_EXHAUSTED ("Your prepayment credits are depleted") but AI Studio Billing page is inaccessible

Gemini API
1

Title:

429 RESOURCE_EXHAUSTED (“Your prepayment credits are depleted”) but AI Studio Billing page is inaccessible

Hello,

I am experiencing an issue with Gemini API billing and access.

Environment:

  • Google Cloud Project: Countec-AI

  • Workspace Domain: countec.co.kr

  • Gemini API enabled

  • Active Cloud Billing account attached

  • API key valid

What works:

  • client.models.list()

What fails:

  • client.models.generate_content()

  • client.models.embed_content()

Error:

429 RESOURCE_EXHAUSTED

“Your prepayment credits are depleted. Please go to AI Studio at https://ai.studio/projects to manage your project and billing.”

What I have already verified:

  1. Billing account is active.

  2. Gemini API is enabled.

  3. API key authentication works.

  4. Google AI Studio service is enabled in Workspace Admin Console.

  5. Incognito mode tested.

  6. models.list() succeeds.

  7. generate_content() and embed_content() both fail.

Google Cloud Billing Support reviewed the case and advised that:

  • The project appears to be operating under Gemini API Tier 1 / Tier 2.

  • These tiers require a prepayment balance.

  • A depleted prepayment balance causes the 429 error.

  • However, Billing Support cannot access AI Studio internal billing information.

My problem:

I cannot access the AI Studio Billing page to view or replenish the prepayment balance.

Questions:

  1. How can I view the current prepayment balance?

  2. How can I add prepayment credits if AI Studio Billing is inaccessible?

  3. Is there a known synchronization issue between Google Cloud Billing and AI Studio billing?

  4. Can someone verify whether this project is associated with a depleted prepayment balance?

Thank you.

2

I also got and a lot of other people are also getting this error

3

Facing same issue & Didn’t found any solutions