Advertise
MCP.so
Sign In

MCP Gateway

@lasso-security

RepositoryHomepage

Basic information

Category

Developer Tools

License

MIT

Transports

stdio

Author

lasso-security

About MCP Gateway

A plugin-based gateway that orchestrates other MCPs and allows developers to build upon it enterprise-grade agents.

#python#agent#proxy#mcp#gateway#generative-ai#gen-ai#genai#genai-security#mcp-server#mcp-client#agent-security#mcp-security

MCP Gateway config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "mcp-gateway": {
      "command": "mcp-gateway",
      "args": [
        "--mcp-json-path",
        "~/.cursor/mcp.json",
        "--enable-guardrails",
        "basic",
        "--enable-guardrails",
        "presidio"
      ],
      "servers": {}
    }
  }
}

MCP Gateway tools

2

Provides information about all available proxied MCPs to help LLMs choose appropriate tools and resources

Executes capabilities from any proxied MCP after sanitizing the request and response

Overview

What is MCP Gateway?

MCP Gateway is an intermediary between large language models and other MCP servers. It centralizes and enhances AI infrastructure by reading server configurations from a mcp.json file, managing server lifecycles, intercepting requests and responses to sanitize sensitive information, and providing a unified interface to discover and interact with all proxied servers. It also includes a security scanner that analyzes server reputation and risks before loading.

How to use MCP Gateway?

Install with pip install mcp-gateway. Start the server by running mcp-gateway with the --mcp-json-path flag pointing to your configuration file and the --plugin flag for each plugin to enable (e.g., -p basic -p presidio). You can also run it inside Docker or as a Python module. Configuration is placed under the mcpServers key in your editor’s settings (Cursor, Claude Desktop, etc.) with the gateway itself configured as an MCP server.

Key features of MCP Gateway

  • Automatically masks common secrets (API keys, tokens, etc.)
  • PII masking via the Presidio plugin (credit cards, emails, etc.)
  • Lasso Security guardrails for prompt injection and data leakage
  • Tracing and monitoring of all tool calls with the Xetrack plugin
  • Unified interface to discover and invoke tools from all proxied MCPs
  • Security scanner that checks server reputation before loading

Use cases of MCP Gateway

  • Protect sensitive credentials and PII from exposure to LLMs.
  • Audit and debug MCP tool usage with request/response logs.
  • Centralize management of multiple MCP servers behind one endpoint.
  • Enforce custom AI safety policies with a cloud-based guardrail.

Frequently asked questions

1

What plugins are available out of the box?

The README describes three guardrail plugins: `basic` (secret masking), `presidio` (PII masking), and `lasso` (full security guardrails). There is also a tracing plugin called `xetrack`.

2

How do I install the Presidio plugin?

`pip install mcp-gateway[presidio]` installs the extra dependency required for PII masking.

3

Does MCP Gateway require an API key?

Only the `lasso` plugin requires a `LASSO_API_KEY` environment variable (obtained from Lasso Security). The other plugins work without an external API key.

4

How are MCP servers configured under the gateway?

You place other MCP server configurations inside a `"servers"` key within the gateway’s own entry in your `mcpServers` configuration. The gateway reads them from the `mcp.json` file specified with `--mcp-json-path`.

5

Where are logs and trace data stored?

For the `xetrack` plugin, logs are written to a file path set via `XETRACK_LOGS_PATH`, and structured data is stored in an SQLite database at the path set via `XETRACK_DB_PATH`.

Comments

More Developer Tools MCP servers

ArtiBot Cloud MCP - Zhijiangyun 智匠云

bofob

ArtiBot Cloud MCP (Zhijiangyun 智匠云) — cloud MCP server for robot manipulation data & GPU workloads. 15 tools: robot fleet management, data collection & video recording, post-processing pipelines, and benchmark evaluation

1

JiCo for Jira & Confluence – PII-redacting MCP server with Human-in-the-Loop

drkv-com

JiCo for Jira & Confluence: local MCP server for Jira Data Center - redacts personal data before the AI model, holds every write for approval

Machina

Machina

MCP server for Machina's x402-powered AI agent services. 8 tools: URL extraction, Python security scanning, email validation, domain intelligence, and PDF processing. Pay-per-call in USDC on Base — no subscriptions, no A

Foremerge

naw103

Catch intent conflicts before code conflicts. The open-source coordination protocol for coding agents, built above Git.

50

SSH MCP Server

hypnosis

SSH MCP server for AI agents: remote commands, file transfer, log search and server audits through OpenSSH.

1
Advertise