MCPHost is a CLI application designed to bridge Large Language Models (LLMs) with external tools and data sources via the Model Context Protocol (MCP). It serves as a host in the MCP client-server architecture, enabling LLMs to interact with tools, maintain consistent context, and execute commands safely. The project targets developers and researchers working with LLMs who need to integrate them with external functionalities.

How It Works

MCPHost acts as an intermediary, managing connections to MCP-compatible servers that expose tools. It supports a range of LLMs, including Anthropic Claude, Ollama models, Google Gemini, and OpenAI-compatible APIs. The core advantage lies in its unified interface for interacting with diverse LLM providers and its dynamic tool discovery, allowing LLMs to leverage external capabilities seamlessly.

Quick Start & Requirements

• Install: go install github.com/mark3labs/mcphost@latest
• Prerequisites: Go 1.23+, API keys for Claude/Google, local Ollama installation, and at least one MCP-compatible tool server.
• Setup: Environment variables for API keys (e.g., export ANTHROPIC_API_KEY='your-api-key'). Configuration for MCP servers is managed via ~/.mcp.json.
• Docs: MCP Servers Repository

Highlighted Details

• Supports multiple LLM providers: Anthropic Claude, Ollama, Google Gemini, OpenAI.
• Dynamic tool discovery and integration via MCP servers.
• Configurable message history window for context management.
• Interactive CLI commands for managing tools, servers, and conversation history.

Maintenance & Community

• Active development with contributions welcome.
• Discussion channel available on Discord.

Licensing & Compatibility

• MIT License.
• Compatible with commercial and closed-source applications.

Limitations & Caveats

The project requires Go 1.23+, which may be a recent requirement for some development environments. While it supports various LLMs, specific model compatibility (e.g., function calling support for Ollama/Gemini) is dependent on the underlying LLM provider.