MCP Proxy Server
A central hub that aggregates multiple MCP resource servers into a single unified interface, enabling users to access tools and capabilities from multiple backend servers through one connection point.
What is MCP Proxy Server?
MCP Proxy Server is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to central hub that aggregates multiple mcp resource servers into a single unified interface, enabling users to access tools and capabilities from multiple backend servers through one connection point.
A central hub that aggregates multiple MCP resource servers into a single unified interface, enabling users to access tools and capabilities from multiple backend servers through one connection point.
This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- A central hub that aggregates multiple MCP resource servers
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx mcp-proxy-serverConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use MCP Proxy Server
mcp-proxy is a lightweight Python-based proxy that bridges MCP transport protocols, letting you expose local stdio-based MCP servers over SSE or Streamable HTTP and vice versa. This makes it possible to connect MCP clients that only speak SSE/HTTP to servers that only speak stdio, aggregate multiple named servers behind a single endpoint, and add OAuth2 or bearer token authentication to any MCP service. Teams use it to host MCP servers remotely, share them across teammates, and build composable MCP infrastructure.
Prerequisites
- Python 3.10+ and uv or pipx installed
- An MCP client such as Claude Desktop or Claude Code
- The stdio-based MCP server(s) you want to expose must already be installed
- Optional: OAuth2 credentials (client-id, client-secret, token-url) for secured endpoints
Install mcp-proxy
Install via uv tool (recommended) or pipx. Both methods place the mcp-proxy binary on your PATH.
uv tool install mcp-proxy
# or
pipx install mcp-proxyMode 1 — Connect to a remote SSE server
Use mcp-proxy as a stdio client that translates SSE from a remote server into stdio for local MCP clients.
mcp-proxy http://example.io/sse
# With bearer token:
mcp-proxy --headers Authorization 'Bearer yourtoken' http://example.io/sseMode 2 — Expose a local stdio server over SSE
Wrap a local stdio MCP server so remote clients can reach it via SSE. Specify the port and the command to run the stdio server.
mcp-proxy --port 8080 uvx mcp-server-fetch
# Bind to all interfaces:
mcp-proxy --port 8080 --host 0.0.0.0 uvx mcp-server-fetchUse a named-server config file
Define multiple named MCP servers in a JSON config file and expose them all through a single proxy instance.
# servers.json
{
"mcpServers": {
"fetch": {
"enabled": true,
"command": "uvx",
"args": ["mcp-server-fetch"],
"env": {},
"transportType": "stdio"
}
}
}
mcp-proxy --port 8080 --named-server-config ./servers.jsonAdd CORS headers for browser clients
Allow browser-based clients to connect by enabling CORS on the proxy.
mcp-proxy --port 8080 --allow-origin='*' uvx mcp-server-fetchConfigure your MCP client to use the proxy
Point Claude Desktop or another client at the proxy's SSE endpoint instead of running the stdio server directly.
{
"mcpServers": {
"my-server": {
"command": "mcp-proxy",
"args": ["http://your-server-host:8080/sse"]
}
}
}MCP Proxy Server Examples
Client configuration
Claude Desktop configuration using mcp-proxy to connect to a remote SSE MCP server with a bearer token.
{
"mcpServers": {
"remote-fetch": {
"command": "mcp-proxy",
"args": [
"--headers",
"Authorization",
"Bearer YOUR_TOKEN_HERE",
"http://your-server:8080/sse"
]
}
}
}Prompts to try
Example prompts once your proxied MCP tools are connected.
- "List all available tools from my proxied MCP servers"
- "Fetch the content of https://example.com using the fetch tool"
- "Which MCP servers are currently connected through the proxy?"
- "Run the search tool from my remote MCP endpoint"Troubleshooting MCP Proxy Server
Connection refused when the MCP client tries to reach the proxy
Verify mcp-proxy is running with the correct --port and --host flags. If binding to localhost (default), remote clients cannot reach it — use --host 0.0.0.0 to accept external connections.
Authentication fails with 401 Unauthorized on the remote SSE server
Pass the bearer token via --headers: mcp-proxy --headers Authorization 'Bearer <token>' <url>. Alternatively set the API_ACCESS_TOKEN environment variable which the proxy reads automatically.
CORS errors in browser-based MCP clients
Start mcp-proxy with --allow-origin='*' (or a specific origin) to add the necessary CORS response headers.
Frequently Asked Questions about MCP Proxy Server
What is MCP Proxy Server?
MCP Proxy Server is a Model Context Protocol (MCP) server that central hub that aggregates multiple mcp resource servers into a single unified interface, enabling users to access tools and capabilities from multiple backend servers through one connection point. It connects AI assistants to external tools and data sources through a standardized interface.
How do I install MCP Proxy Server?
Follow the installation instructions on the MCP Proxy Server GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with MCP Proxy Server?
MCP Proxy Server works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is MCP Proxy Server free to use?
Yes, MCP Proxy Server is open source and available under the MIT License license. You can use it freely in both personal and commercial projects.
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