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MCP Gateway

@lucky-aeon

Repository

Basic information

Category

Other

Transports

stdio

Author

lucky-aeon

About MCP Gateway

The MCP gateway is a reverse proxy server that forwards requests from clients to the MCP server or uses all MCP servers under the gateway through a unified portal.

MCP Gateway config

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

{
  "mcpServers": {
    "mcp-gateway-lucky-aeon": {
      "command": "docker",
      "args": [
        "pull",
        "ghcr.io/lucky-aeon/mcp-gateway:latest"
      ]
    }
  }
}

MCP Gateway tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is MCP Gateway?

MCP Gateway is a reverse proxy server that forwards requests from clients to MCP servers or acts as a unified portal for all MCP servers under the gateway. It supports SSE (default) and Streamable HTTP transport protocols, which are switchable at startup.

How to use MCP Gateway?

Deploy via Docker using the provided image (ghcr.io/lucky-aeon/mcp-gateway). Configure config.json to set the gateway protocol, authentication, and MCP service manager settings. Use the API endpoints: /deploy to register MCP servers, /sse and /message for SSE mode, or /stream for Streamable HTTP mode. The gateway protocol can also be set with the --protocol CLI flag.

Key features of MCP Gateway

  • Deploy multiple MCP servers via uvx, npx, or SSE URL.
  • Unified portal to call any MCP server.
  • Aggregate all downstream SSE streams into one.
  • List all tools from all servers with namespacing.
  • Streamable HTTP aggregated endpoint with session management.
  • Dynamic capability aggregation (gateway advertises capabilities present in at least one downstream server).
  • MCP OAuth 2.1 resource server authentication with Protected Resource Metadata discovery.

Use cases of MCP Gateway

  • Unify multiple MCP servers behind a single endpoint for clients.
  • Aggregate and namespace tools from different MCP servers.
  • Use MCP OAuth 2.1 authentication for secure access.
  • Switch between SSE and Streamable HTTP transport without changing client architecture.

Frequently asked questions

1

What transport protocols does MCP Gateway support?

MCP Gateway supports SSE (default) and Streamable HTTP (MCP spec `2025-03-26`), switchable at startup via `config.json` or the `--protocol` flag.

2

How do I configure authentication?

Set `Auth.Enabled` to `true` or `false` in `config.json`. When enabled, every MCP request must include a `Bearer` access token. You can use built-in SaaS mode or external OAuth providers. For local development, set `Auth.Enabled` to `false`.

3

How do I deploy an MCP server through the gateway?

Send a `POST /deploy` request with JSON containing `mcpServers`, specifying the server name and either a `url` or `command` (with optional `args` and `env`).

4

What is the difference between SSE mode and gateway SSE mode?

In "Use MCP (SSE Mode)", requests go directly to a specific MCP server (e.g., `/{server-name}/sse`). In "Use Gateway (SSE Mode)`, requests go to a single `/sse` endpoint, and the gateway merges all downstream SSE streams. Tools are namespaced as `{serverName}-{toolName}`.

5

How does Streamable HTTP mode work?

The gateway exposes `/stream`. Establish a session with `POST /stream` (initialize), get a `Mcp-Session-Id` header, then include it on subsequent requests. Handshake with `notifications/initialized`, then call tools or list resources.

Comments

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