HTTP 429 When Calling the Gemini API on AWS

Sun, 02 Aug 2026 09:00:00 +0700

Running into HTTP 429 calling the Gemini API on AWS — and how our team fixed it.

Hi everyone 👋

While building our capstone project (a RAG chatbot running on EC2 that calls the Gemini API), we hit an error that anyone who’s integrated a third-party API has probably run into at least once: HTTP 429 – Too Many Requests.

At first we were pretty confused, because everything ran fine locally — no signs of trouble at all. But the moment we deployed to EC2 and tested with multiple concurrent users, requests piled up and Gemini politely declined with a 429.

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HTTP 429 When Calling the Gemini API on AWS