1MCP Server

1MCP - One MCP Server for All

A unified Model Context Protocol server implementation that aggregates multiple MCP servers into one.

Overview

1MCP (One MCP) is designed to simplify the way you work with AI assistants. Instead of configuring multiple MCP servers for different clients (Claude Desktop, Cherry Studio, Cursor, Roo Code, Claude, etc.), 1MCP provides a single, unified server.

Features

Unified Interface: Aggregates multiple MCP servers into one.
Resource Friendly: Reduces system resource usage by eliminating redundant server instances.
Simplified Configuration: Simplifies configuration management across different AI assistants.
Standardized Interaction: Provides a standardized way for AI models to interact with external tools and resources.
Dynamic Configuration: Supports dynamic configuration reloading without server restart.
Async Loading: Optional asynchronous server loading with real-time capability updates via listChanged notifications.
Graceful Shutdown: Handles graceful shutdown and resource cleanup.
Secure: Includes comprehensive authentication and security features.
Optimized: Supports advanced filtering, pagination, and request optimization.
Health Monitoring: Built-in health check endpoints for monitoring and observability.

Quick Start

Get up and running with 1MCP in just a few steps:

1. Add MCP Servers

Add the MCP servers you want to use. Here are some popular examples:

# Add Context7 for documentation and code examples
npx -y @1mcp/agent mcp add context7 -- npx -y @upstash/context7-mcp

# Add Sequential Thinking for complex analysis
npx -y @1mcp/agent mcp add sequential -- npx -y @modelcontextprotocol/server-sequential-thinking

# Add Filesystem for file operations
npx -y @1mcp/agent mcp add filesystem -- npx -y @modelcontextprotocol/server-filesystem ~/Documents

2. Start the 1MCP Server

npx -y @1mcp/agent

The server will start on http://127.0.0.1:3050 and show you which MCP servers are active.

3. Connect Your AI Assistant

For Cursor, add to ~/.cursor/mcp.json or <project-root>/.cursor/mcp.json:

{
  "mcpServers": {
    "1mcp": {
      "url": "http://127.0.0.1:3050/mcp?app=cursor"
    }
  }
}

For VSCode, add to settings.json or <project-root>/.vscode/mcp.json:

{
  "servers": {
    "1mcp": {
      "url": "http://127.0.0.1:3050/mcp?app=vscode"
    }
  }
}

Install MCP Server to VSCode

For Claude Code, run:

claude mcp add -t http 1mcp "http://127.0.0.1:3050/mcp?app=claude-code"

4. Verify Everything Works

Check server status and connected MCP servers:

npx -y @1mcp/agent mcp status

Visit the health endpoint to see system status: http://127.0.0.1:3050/health

That's it! All your MCP servers are now available through one unified endpoint. 🎉

Commands

1MCP provides several commands to manage your MCP server configuration:

Core Commands

npx -y @1mcp/agent [serve] - Start the 1MCP server (default command)
- --transport - Choose transport type (stdio, http, sse)
- --config - Use specific config file
- --port - Change HTTP port

MCP Management

npx -y @1mcp/agent mcp add <name> - Add a new MCP server to configuration
npx -y @1mcp/agent mcp remove <name> - Remove an MCP server
npx -y @1mcp/agent mcp list - List all configured MCP servers
npx -y @1mcp/agent mcp status [name] - Show server status and details
npx -y @1mcp/agent mcp enable/disable <name> - Enable or disable servers
npx -y @1mcp/agent mcp update <name> - Update server configuration

App Integration

npx -y @1mcp/agent app consolidate - Consolidate configurations from other MCP apps
npx -y @1mcp/agent app discover - Discover MCP servers from installed applications
npx -y @1mcp/agent app list - List discovered applications
npx -y @1mcp/agent app status - Show consolidation status

For detailed command usage, run: 1mcp <command> --help

Full documentation: Commands Reference

Prerequisites

Node.js (version 21 or higher)
pnpm

Usage

You can run the server directly using npx:

# Basic usage (starts server with SSE transport)
npx -y @1mcp/agent

# Use existing Claude Desktop config
npx -y @1mcp/agent --config ~/Library/Application\ Support/Claude/claude_desktop_config.json

# Use stdio transport instead of SSE
npx -y @1mcp/agent --transport stdio

# Use external URL for reverse proxy setup (nginx, etc.)
npx -y @1mcp/agent --external-url https://example.com

# Configure trust proxy for reverse proxy setup
npx -y @1mcp/agent --trust-proxy=192.168.1.1

# Show all available options
npx -y @1mcp/agent --help

Available options:

Option (CLI)	Environment Variable	Description	Default
`--transport`, `-t`	`ONE_MCP_TRANSPORT`	Choose transport type ("stdio", "http", or "sse")	"http"
`--config`, `-c`	`ONE_MCP_CONFIG`	Use a specific config file
`--port`, `-P`	`ONE_MCP_PORT`	Change HTTP port	3050
`--host`, `-H`	`ONE_MCP_HOST`	Change HTTP host	localhost
`--external-url`, `-u`	`ONE_MCP_EXTERNAL_URL`	External URL for OAuth callbacks and public URLs (e.g., https://example.com)
`--trust-proxy`	`ONE_MCP_TRUST_PROXY`	Trust proxy configuration for client IP detection (boolean, IP, CIDR, preset)	"loopback"
`--tags`, `-g`	`ONE_MCP_TAGS`	Filter servers by tags
`--pagination`, `-p`	`ONE_MCP_PAGINATION`	Enable pagination for client/server lists (boolean)	false
`--enable-auth`	`ONE_MCP_ENABLE_AUTH`	Enable authentication (OAuth 2.1)	false
`--enable-scope-validation`	`ONE_MCP_ENABLE_SCOPE_VALIDATION`	Enable tag-based scope validation (boolean)	true
`--enable-enhanced-security`	`ONE_MCP_ENABLE_ENHANCED_SECURITY`	Enable enhanced security middleware (boolean)	false
`--session-ttl`	`ONE_MCP_SESSION_TTL`	Session expiry time in minutes (number)	1440
`--session-storage-path`	`ONE_MCP_SESSION_STORAGE_PATH`	Custom session storage directory path (string)
`--rate-limit-window`	`ONE_MCP_RATE_LIMIT_WINDOW`	OAuth rate limit window in minutes (number)	15
`--rate-limit-max`	`ONE_MCP_RATE_LIMIT_MAX`	Maximum requests per OAuth rate limit window (number)	100

Docker

You can also run 1MCP using Docker:

# Pull the latest image
docker pull ghcr.io/1mcp-app/agent:latest

# Run with HTTP transport (default)
docker run -p 3050:3050 ghcr.io/1mcp-app/agent

# Run with a custom config file
docker run -p 3050:3050 -v /path/to/config.json:/config.json ghcr.io/1mcp-app/agent --config /config.json

# Run with stdio transport
docker run -i ghcr.io/1mcp-app/agent --transport stdio

Available image tags:

latest: Latest stable release
vX.Y.Z: Specific version (e.g. v1.0.0)
sha-<commit>: Specific commit

Examples:

# Custom port, tags, and logging
docker run -p 3051:3051 \
  -e ONE_MCP_PORT=3051 \
  -e ONE_MCP_TAGS=network,filesystem \
  -e ONE_MCP_LOG_LEVEL=debug \
  ghcr.io/1mcp-app/agent

# With external URL for reverse proxy
docker run -p 3050:3050 \
  -e ONE_MCP_EXTERNAL_URL=https://mcp.example.com \
  -e ONE_MCP_TRUST_PROXY=true \
  ghcr.io/1mcp-app/agent

Trust Proxy Configuration

When running 1MCP behind a reverse proxy, configure trust proxy settings for proper client IP detection:

# Default (safe for local development)
npx -y @1mcp/agent --trust-proxy=loopback

# Behind reverse proxy
npx -y @1mcp/agent --trust-proxy=192.168.1.1

# Behind CDN/Cloudflare
npx -y @1mcp/agent --trust-proxy=true

See docs/TRUST_PROXY.md for detailed configuration options, security considerations, and reverse proxy setup examples.

Understanding Tags

Tags help you control which MCP servers are available to different clients. Think of tags as labels that describe what each server can do.

How to Use Tags

In your server config: Add tags to each server to describe its capabilities

{
  "mcpServers": {
    "web-server": {
      "command": "uvx",
      "args": ["mcp-server-fetch"],
      "tags": ["network", "web"],
      "disabled": false
    },
    "file-server": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-filesystem", "~/Downloads"],
      "tags": ["filesystem"],
      "disabled": false
    }
  }
}

When starting 1MCP in stdio mode: You can filter servers by tags

# Only start servers with the "network" tag
npx -y @1mcp/agent --transport stdio --tags "network"

# Start servers with either "network" or "filesystem" tags
npx -y @1mcp/agent --transport stdio --tags "network,filesystem"

When using SSE transport: Clients can request servers with specific tags

{
  "mcpServers": {
    "1mcp": {
      "type": "http",
      "url": "http://localhost:3050/sse?tags=network" // Only connect to network-capable servers
    }
  }
}

Example tags:

network: For servers that make web requests
filesystem: For servers that handle file operations
memory: For servers that provide memory/storage
shell: For servers that run shell commands
db: For servers that handle database operations

Configuration

Global Configuration

The server automatically manages configuration in a global location:

macOS/Linux: ~/.config/1mcp/mcp.json
Windows: %APPDATA%/1mcp/mcp.json

Configuration File Format

{
  "mcpServers": {
    "mcp-server-fetch": {
      "command": "uvx",
      "args": ["mcp-server-fetch"],
      "disabled": false
    },
    "server-memory": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-memory"],
      "disabled": false
    }
  }
}

Authentication

1MCP supports OAuth 2.1 for secure authentication. To enable it, use the --enable-auth flag. The --auth flag is deprecated and will be removed in a future version.

When authentication is enabled, 1MCP acts as an OAuth 2.1 provider, allowing client applications to securely connect. This ensures that only authorized clients can access the MCP servers.

Health Monitoring

1MCP provides comprehensive health check endpoints for monitoring and observability:

Health Check Endpoints

GET /health - Complete health status including system metrics, server status, and configuration
GET /health/live - Simple liveness probe (always returns 200 if server is running)
GET /health/ready - Readiness probe (returns 200 if configuration is loaded and ready)

Health Status Levels

healthy - All systems operational (HTTP 200)
degraded - Some issues but still functional (HTTP 200)
unhealthy - Critical issues affecting functionality (HTTP 503)

Monitoring Integration

Use these endpoints with:

Load balancers (health checks)
Container orchestration (Kubernetes health probes)
CI/CD pipelines (deployment validation)

How It Works

1MCP acts as a proxy, managing and aggregating multiple MCP servers. It starts and stops these servers as subprocesses and forwards requests from AI assistants to the appropriate server. This architecture allows for a single point of entry for all MCP traffic, simplifying management and reducing overhead.

System Architecture

Request Flow

Development

Install dependencies:

pnpm install

Build the server:

pnpm build

For development with auto-rebuild:

pnpm watch

Run the server:

# Copy the example environment file first
cp .env.example .env

# Then run the development server
pnpm dev

Debugging

Using the MCP Inspector, which is available as a package script:

pnpm inspector

The Inspector will provide a URL to access debugging tools in your browser.

Debugging & Source Maps

This project uses source-map-support to enhance stack traces. When you run the server, stack traces will reference the original TypeScript source files instead of the compiled JavaScript. This makes debugging much easier, as error locations and line numbers will match your source code.

No extra setup is required—this is enabled by default. If you see a stack trace, it will point to .ts files and the correct line numbers. 🗺️

Contributing

Contributions are welcome! Please read our CONTRIBUTING.md for details on our code of conduct, and the process for submitting pull requests to us.

License

This project is licensed under the Apache License 2.0. See the LICENSE file for details.

This server cannot be installed

security - not tested

license - permissive license

quality - not tested

How are these scores calculated?

hybrid server

The server is able to function both locally and remotely, depending on the configuration or use case.

A unified Model Context Protocol server that aggregates multiple MCP servers into one, allowing AI assistants like Claude Desktop, Cursor, and Cherry Studio to connect to a single server instead of managing multiple instances.

Related MCP Servers

MCP Simple OpenAI Assistant
andybrandt
-
security
A
license
-
quality
A simple MCP server for interacting with OpenAI assistants. This server allows other tools (like Claude Desktop) to create and interact with OpenAI assistants through the Model Context Protocol.
Last updated -
34
Python
MIT License
MCP Starter
instructa
A
security
A
license
A
quality
A foundation for building custom local Model Context Protocol (MCP) servers that provide tools accessible to AI assistants like Cursor or Claude Desktop.
Last updated -
1
28
TypeScript
MIT License
AgentModeofficial
agentmode
A
security
F
license
A
quality
An all-in-one Model Context Protocol (MCP) server that connects your coding AI to numerous databases, data warehouses, data pipelines, and cloud services, streamlining development workflow through seamless integrations.
Last updated -
2
Python
Scenario Word
HyunJuHwan
A
security
F
license
A
quality
A Model Context Protocol (MCP) server that allows Claude AI to interact with custom tools, enabling extension of Claude's capabilities through the MCP framework.
Last updated -
TypeScript

View all related MCP servers