Zero-dependency in-memory PII airgap & reversible masking proxy for Cloud LLMs (GDPR Art. 32 compliant MCP server)
🛡️ ScrubVault: Zero-Data-Leak AI Airgap & Reversible PII Masking Engine
Send sensitive data to Cloud LLMs (ChatGPT, Claude, Gemini) without ever leaking confidential PII.
ScrubVault is a lightweight, zero-dependency in-memory privacy proxy and Model Context Protocol (MCP) server. It intercept prompts, replaces personal identifiable information (emails, IBANs, IP addresses, credit cards, tax IDs) with deterministic local tokens ({{EMAIL1}}, {{IBAN1}}), and restores the original values when the AI responds.
🤖 Model Context Protocol (MCP) Integration
ScrubVault includes a native stdio Model Context Protocol (MCP) server. Add it to your claudedesktopconfig.json or Antigravity configuration:
Available MCP Tools: scrubmasktext: Masks PII in input text and returns a reversible token map. scrubunmasktext: Replaces tokens with original values. scrubauditrisk: Calculates risk scores and detection breakdowns. scrubanonymizejson: Recursively scrubs JSON structures.
Pure Python Standard Library: Zero third-party dependencies (re, json, sys, typing). In-Memory Vault: Token maps live exclusively in volatile RAM and are never written to disk. ReDoS Hardened: Regex patterns are strictly bounded against algorithmic complexity attacks. Audit Passed: Tested and verified by Raptor Guard SAST (0 Critical, 0 High, 0 Medium findings).
📄 License Apache License 2.0. Open-source research and engineering by the Diamantenschmiede.
From the project README.
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