{"id":"mcp-gateway","name":"MCP Gateway","homepage":"https://github.com/lasso-security/mcp-gateway","repo_url":"https://github.com/lasso-security/mcp-gateway","category":"security","subcategories":["mcp-proxy","security-gateway","pii-protection"],"tags":["mcp-gateway","security","pii-masking","prompt-injection","mcp-proxy","python","plugin-based","enterprise","lasso-security"],"what_it_does":"A plugin-based MCP gateway that sits between an LLM and other MCP servers, intercepting and sanitizing requests/responses to prevent PII leakage, token/secret exposure, prompt injection attacks, and harmful content — with built-in security scanning of MCP server reputation.","use_cases":["Adding a security and PII protection layer in front of existing MCP servers without modifying them","Detecting and blocking prompt injection attempts embedded in MCP tool responses before they reach the LLM","Auditing and logging MCP tool calls for compliance and observability via the xetrack plugin"],"not_for":["Simple personal MCP setups where security overhead is unnecessary","Teams that need full enterprise policy management without Lasso Security's commercial API key (basic/presidio plugins have limited coverage)","High-throughput production environments where the Python proxy layer adds latency concerns"],"best_when":"You are deploying MCP servers in an enterprise context and need a drop-in security layer for PII masking, secret detection, and prompt injection defense without rewriting existing MCP servers.","avoid_when":"You want full security coverage (PII + secrets + prompt injection + harmful content) without the Lasso commercial plugin — the open-source plugins only partially cover these cases.","alternatives":[{"id":"mcp-gateway-registry","reason":"Registry and discovery layer for MCP servers rather than a security proxy"},{"id":"guardrails-ai","reason":"More mature guardrails framework for LLM output validation with broader language support"}],"af_score":73.0,"security_score":85.0,"reliability_score":null,"package_type":"mcp_server","discovery_source":["github","crates_io"],"priority":"low","status":"evaluated","version_evaluated":"latest","last_evaluated":"2026-03-01T09:50:05.854617+00:00","performance":{"latency_p50_ms":null,"latency_p99_ms":null,"uptime_sla_percent":null,"rate_limits":null,"data_source":"llm_estimated","measured_on":null}}