Guardrailing Gemini API: A Developer's Proxy for PII and Spend Caps
GiiTZzz · reddit · 2026-08-09
A developer highlights two major pain points when integrating the Gemini API: prompts containing sensitive info (like SSNs) going directly to the model, and runaway loops inflating the bill.
To solve this, they built a lightweight proxy to intercept API requests, performing two main tasks: scanning prompts and replies for PII and injection patterns, and enforcing hard daily spend caps per IP. The author seeks community feedback on best practices for capping LLM spend and preventing privacy leaks in production.
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