Kuri
What is kuri?
kuri is a framework that helps developers build MCP servers in Rust. MCP (Model Context Protocol) allows AI models to execute predefined functions (called 'tools') to fetch data or interact with external systems. kuri makes building these servers easy and enjoyable.How to use kuri?
Developers write regular Rust functions and annotate them with simple attributes to expose them as MCP tools. The framework handles all the protocol details automatically.Use Cases
Building AI-powered applications where the AI needs to perform calculations, fetch data, or interact with other systems through well-defined interfaces.Key Features
Seamless Rust IntegrationWrite tools as normal async Rust functions with minimal annotations
Tower Ecosystem CompatibilityLeverage existing middleware for timeouts, tracing, and more
MCP Protocol SupportFull support for core MCP specification including tools and prompts
Pros and Cons
Advantages
Excellent developer experience with clean, idiomatic Rust
Strong type safety and correctness guarantees
Minimal boilerplate and configuration
Reuse existing Rust ecosystem components
Limitations
Currently only supports stdin/stdout transport (HTTP coming soon)
Some advanced MCP features like Resources not yet implemented
Requires Rust knowledge to use effectively
Getting Started
Add dependencies
Include kuri and required crates in your Cargo.toml
Define your tools
Write async functions and annotate them with #[tool] or #[prompt]
Build and run service
Create the MCP service and register your tools
Example Use Cases
Calculator ToolA simple arithmetic calculator that the AI can use to perform calculations
Text SummarizationGenerates prompts for summarizing text in different formats
Frequently Asked Questions
What is MCP?
Do I need to know Rust to use kuri?
When will HTTP transport be available?
Additional Resources
MCP Specification
Official Model Context Protocol documentation
kuri GitHub Repository
Source code and issue tracker
Rust Programming Language
Official Rust website
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