Scaled MCP Server

What is Scaled MCP Server?

The Scaled MCP Server is a Go library that implements the MCP 2025-03 specification with support for horizontal scaling. It provides a horizontally scalable MCP server designed to be embedded in applications, supporting load-balanced deployments with flexible configuration.

How to use Scaled MCP Server?

Install the library with go get github.com/traego/scaled-mcp@latest (requires Go 1.24 or higher). Create a server with config.DefaultConfig(), configure session storage (in-memory for testing or Redis for production), create a tool registry (static or dynamic), and start the server with srv.Start(). The library also supports using an external HTTP server via a custom router.

Key features of Scaled MCP Server

• HTTP transport with main /mcp endpoint and optional SSE endpoint
• Distributed session management using Redis or in-memory store
• Actor-based architecture for session handling and message routing
• Horizontal scaling support for load-balanced multi-node deployments
• Static and dynamic tool registry options
• Embeddable Go library requiring only Go 1.24+

Use cases of Scaled MCP Server

• Build a scalable AI assistant that exposes tools and prompts via MCP
• Deploy a load-balanced MCP server across multiple nodes for high availability
• Integrate custom tool registries (e.g., calculator, weather) with dynamic updates
• Use an existing HTTP server infrastructure (e.g., Chi router) with MCP transport