mcp-schema

This repository (mcp-schema) contains a Rust port of the official Model Context Protocol (MCP) schema originally written in TypeScript.

What is MCP?

Model Context Protocol (MCP) is an open protocol designed to enable secure, bidirectional integration between Large Language Model (LLM) applications and external data sources or tools. Its key characteristics include:

1. Primary Goals

   • Enables seamless integration between LLM-based applications and external data sources or tools.
   • Provides secure two-way communication between AI systems and data sources.

2. Main Features

   • Allows servers to expose tools callable by language models.
   • Facilitates interactions with external systems (e.g., database queries, API calls, computations).
   • Adopts a client-host-server architecture, where a host can run multiple client instances.

3. Use Cases

   • Building AI-enhanced IDE (Integrated Development Environment) features.
   • Extending chat interfaces with advanced functionalities.
   • Creating custom AI workflows that integrate multiple tools.

4. Benefits

   • Maintains clear security boundaries while unifying AI functionality across different applications.
   • Provides standardized interfaces, making it easier to connect disparate systems.
   • Ensures secure, bidirectional connections between data sources and AI tools.

Why Port MCP Schema to Rust?

Rust offers several advantages for complex protocol implementations like MCP:

• Type Safety
  Rust’s static type system catches logical errors at compile time, reducing runtime bugs.

• Flexible Data Conversion
  Using serde, Rust can seamlessly serialize/deserialize structured data to/from JSON, making it ideal for protocol messages.

• Compile-Time Constraint Checks
  The Rust compiler enforces constraints early, helping ensure correctness before deployment.

• Customizable Serialization/Deserialization
  With Rust traits and derive macros, you can fine-tune how MCP messages are structured and validated, ensuring robust and secure communication.

These features are particularly valuable for web and microservice architectures, where strong reliability and security are crucial.

Repository Overview

• src/
  Contains the Rust code that mirrors the structure and definitions from the official TypeScript schema.

• Cargo.toml
  Project configuration for building and managing dependencies.

• README.md
  This file, outlining the purpose, usage, and key benefits of porting MCP to Rust.

Getting Started

1. Install Rust
   Make sure a recent version of Rust is installed (e.g., via rustup).

2. Clone this repository

   git clone https://github.com/yonaka15/mcp-schema.git
   cd mcp-schema

Installation

From crates.io

You can also add mcp-schema from crates.io:

cargo add mcp-schema

Or add mcp-schema as a dependency in your project’s Cargo.toml:

[dependencies]
mcp-schema = "0.1.2"

License

This project is licensed under the MIT License—see the LICENSE file for details.