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Show HN: PasteGuard – Self-hosted privacy proxy for LLMs
- sgasser 9mo agoUsing LLM APIs but worried about sending client data? Built a proxy for that. OpenAI-compatible proxy that masks personal data and secrets before sending to your provider. Mask Mode (default): You send: "Email sarah.chen@hospital.org about meeting Dr. Miller" LLM receives: "Email <EMAIL_1> about meeting <PERSON_1>" You get back: Original names restored in response Route Mode (if you run a local LLM): Requests with PII → Local LLM Everything else → Cloud What it catches: PII: Names, emails, phones, credit cards, IBANs, IPs, locations (24 languages) Secrets: Private keys, API keys (OpenAI, AWS, GitHub), JWT tokens Uses Microsoft Presidio for PII detection. ~500MB RAM, 10-50ms per request. Works with Cursor, Open WebUI, LangChain, or any OpenAI-compatible client. Docs: https://pasteguard.com/docs https://pasteguard.com/docs Feedback on edge cases welcome.