VectorMCP MCP Server

What is VectorMCP?

VectorMCP is a Ruby implementation of the Model Context Protocol (MCP) server-side specification. It provides a framework for exposing tools, resources, prompts, roots, sampling, middleware, and security over the MCP streamable HTTP transport.

How to use VectorMCP?

Install the gem (gem install vector_mcp), create a VectorMCP::Server, register tools (using either the class-based VectorMCP::Tool DSL or the block-based register_tool API), and call server.run(port: 8080). Optionally mount the server in a Rack or Rails app via server.rack_app.

Key features of VectorMCP

• Streamable HTTP transport with session management and resumability
• Class-based tools via VectorMCP::Tool and block-based register_tool API
• Rack and Rails mounting through server.rack_app
• Opt-in authentication, authorization, and middleware hooks
• Image-aware tools, resources, and prompts; roots and server-initiated sampling
• Token-based field anonymization middleware for sensitive data

Use cases of VectorMCP

• Build a custom MCP server to expose business tools to LLM clients
• Integrate MCP endpoints into an existing Ruby on Rails application
• Create a secure, authenticated API for AI-driven tool invocation
• Implement a compliant MCP server with streaming and session support