MCP Gateway
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.
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.
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
Alternatives
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Scores are editorial opinions as of 2026-03-01.