Pseudonym Mcp

Pseudonym MCP is a local pseudonymisation tool designed for privacy-preserving LLM workflows. It detects and replaces PII (personally identifiable information) with opaque tokens before sending text to a cloud-based LLM (like Claude, GPT-4, Gemini), then restores the tokens to the original PII upon return. The system supports multi-language PII detection (English and Polish), hybrid NER (regex and local LLM), strict validation, and is intended as a technical privacy control for GDPR, AI Act, HIPAA, and other privacy frameworks. This makes it ideal for teams and developers integrating LLMs into sensitive data workflows, especially in regulated sectors.