Firewall

mcpwall is a transparent firewall and rules engine for MCP (Model Context Protocol) servers, designed to secure local tool access by blocking dangerous requests, redacting secrets in responses, and preventing prompt injection attacks at runtime. Targeted at developers and organizations using AI tools via MCP, it features deterministic, programmable policies defined in YAML, operates entirely offline for privacy and GDPR/EU AI Act compliance, and requires only a simple config change to activate protection.