Show HN: Secret Guard – a local LLM gateway; keys never leave your machine

Category: security

Tags: llm-gateway, secrets-management, privacy, rust, proxy

Score: 7.0/10 (Innovation: 6, Technical: 7, Documentation: 8, Utility: 7)

Secret Guard is a local LLM gateway that transparently replaces secrets in outbound LLM requests with realistic mock values and restores them in responses, so agent tools keep working while secrets never reach the vendor. It supports multiple LLM protocols, per-secret strategies (redact, reject, placeholder), and includes a WebUI for inspection and management.

Target audience: backend devs, devops, security engineers, AI/LLM application developers

Repository: https://github.com/luochen1990/secret-guard · Rust · MIT · 7 stars

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