Raku MCP SDK

The Raku MCP SDK provides a comprehensive Raku (Perl 6) implementation of the Model Context Protocol (MCP). This SDK enables developers to build MCP servers and clients in Raku, facilitating seamless integration with LLM applications such as Claude Desktop, IDEs, and various AI tools.

Why Raku?

Raku is an expressive, multi-paradigm programming language recognized for its strong concurrency tools, flexible type system, and robust Unicode support. It is particularly effective in building protocol-first infrastructures, prioritizing clarity, safety, and rapid iteration.

Key Features

The Raku MCP SDK fully complies with the MCP specification 2025-11-25. Here are some of its notable features:

• JSON-RPC 2.0: Complete handling of JSON-RPC messages for seamless communication.
• Stdio and HTTP Transport: Supports both local and remote processes with resumption capabilities, ensuring robust client-server interaction.
• Resources and Tools: Easily define and utilize tools and resources, with support for annotations, logging, cancellation, and subscriptions.
• Prompts: Create structured prompts for interactive workflows.
• OAuth 2.1 Support: Built-in capabilities for secure token management and validation.
• Async Execution: Supports asynchronous tool execution and status handling.

Example of creating a server:

use MCP;
use MCP::Server;
use MCP::Transport::Stdio;

my $server = MCP::Server::Server.new(
    info => MCP::Types::Implementation.new(name => 'my-server'),
    transport => MCP::Transport::Stdio::StdioTransport.new,
);

$server.add-tool(...);
await $server.serve;

Benefits of Using MCP

The MCP serves as a universal interface, solving the integration challenge between AI applications and diverse data sources. It eliminates the need for specific adapters by allowing multiple clients to communicate over a single protocol. This interface allows servers to expose resources, tools, and prompts while enabling clients (AI applications) to discover and securely utilize these capabilities.

Raku's Position in AI and MCP

Raku stands out as a robust programming choice for AI domains, particularly those related to language processing and orchestration. Its features include:

• Introspection: Raku's meta-object protocol allows for JSON schema generation directly from function definitions, enhancing usability.
• Gradual Typing: Raku's type system ensures data integrity in structured exchanges, vital for effective AI interaction.

Contributing

Contributions are welcomed. Developers can engage in discussions, report issues, or submit pull requests. To maintain code quality, direct pushes to the main branch are not allowed, and merges require thorough reviews and passing checks.

For detailed guidelines, visit the contributing section in the repository.

Quality Assurance

Raku MCP SDK incorporates automated testing and CI workflows, encompassing linting, testing across multiple OS environments, and performance benchmarking to ensure reliability and efficiency.

Further Information

For more details, to access examples, or to explore the SDK in action, please visit the repository.