FPE Demo MCP Server

Example Use Cases

• 1

  Securely encrypt and decrypt digit-based sensitive data using format-preserving encryption.

• 2

  Authenticate requests via shared secrets or JWTs in different modes including production.

• 3

  A lightweight MCP server to prototype or learn about FF3 FPE and MCP authentication.

Description

FPE Demo MCP is a simple, readable implementation of a Model Context Protocol server that provides format-preserving encryption (FF3) and multiple authentication modes. It supports both stdio and HTTP transports, making it suitable for local and web-based LLM integrations. The server normalizes input to digits and returns encrypted values with a clear prefix for easy identification, ideal for learning and prototyping encryption with LLMs.