Model Context Protocol (MCP) Implementation in Go
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This Go implementation of the Model Context Protocol enables communication between LLM hosts (e.g., clients) and servers that provide contextual information, tools, prompts, or resources. It includes type-safe Go struct definitions and a client library for JSON‑RPC based…
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- vishymakthal
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- Go struct definitions translated from the TypeScript schema
- Client implementation with initialize, list, read, and call methods
- Helper functions for handling polymorphic types via json.RawMessage
- Supports Resources, Tools, Prompts, and Roots of the MCP specification
- Example code demonstrating basic client usage
Set the MCP_SERVER_URL environment variable (defaults to http://localhost:3000/jsonrpc) and run go run examples/mcp_client_example.go. Use the mcp.NewClient(url) function to create a client, then call methods like Initialize, ListResources, ReadResource, CallTool, and GetPrompt.
Model Context Protocol (MCP) Implementation in Go
This repository contains a Go implementation of the Model Context Protocol (MCP), a JSON-RPC based protocol for interaction between clients and servers in LLM-powered applications.
Contents
- mcp/schema.go: Go struct definitions for the MCP schema, translated from the TypeScript schema
- mcp/client.go: A client implementation for interacting with MCP servers
- examples/mcp_client_example.go: A simple example showing how to use the client
MCP Overview
The Model Context Protocol (MCP) enables communication between model "hosts" (e.g., LLM clients or systems that interface with LLMs) and "servers" (systems that provide contextual information, tools, prompts, or resources to enhance LLM capabilities).
Key features of MCP include:
- Resources: Files, documents, and other data that a host can read
- Tools: Functions that a host can call on behalf of a model
- Prompts: Templates or pre-defined message sequences a host can use
- Roots: Filesystem or data roots that a server can operate on
Getting Started
Prerequisites
- Go 1.18 or later
Running the Example
```bash
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