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Cortex - Flexible MCP Server Platform

Project Overview

The Cortex project provides a flexible Model Context Protocol (MCP) server platform that supports dynamic tool registration and multiple communication protocols. The platform is designed with a clean separation between the core server infrastructure and the specific tool implementations.

Key Features

Plugin Architecture

  • Provider Interface: A standardized interface for tool providers
  • Registry System: Dynamic registration and discovery of tools
  • Base Provider: A foundation for building custom tool providers
  • Flexible Server: Support for both stdio and HTTP protocols

Decoupled Design

  • Clean Separation: Core platform is separate from specific tool implementations
  • External Tool Providers: Tools can be implemented outside the core
  • Dynamic Loading: Tools can be registered at runtime
  • Versioned Interfaces: Support for evolving tool interfaces

Communication Support

  • Stdio Protocol: Command-line interface via standard input/output
  • HTTP Protocol: Web-based interface via Server-Sent Events (SSE)
  • Unified Message Handling: Consistent API across protocols
  • Graceful Shutdown: Proper handling of termination signals

Security Features

  • Input Validation: Validation of all tool parameters
  • Error Handling: Consistent error reporting and logging
  • Provider Isolation: Tools run in isolated provider contexts
  • Session Management: Client session tracking and management

Implementation

The implementation includes the following components:

Core Platform (pkg/plugin, pkg/server)

  • Plugin Interface: Defines the contract for tool providers
  • Plugin Registry: Manages provider registration and discovery
  • Base Provider: Provides a foundation for building providers
  • Flexible Server: Coordinates tools and communication

Example Providers (examples/providers)

  • Weather Provider: Demonstrates integration with a weather service
  • Database Provider: Shows implementation of database operations

Example Server (cmd/flexible-server)

  • Multi-Protocol Server: Supports both stdio and HTTP
  • Dynamic Tool Integration: Demonstrates provider registration
  • Command-Line Options: Configuration for different operation modes
  • Error Handling: Robust error handling and logging

Usage

Running the Server

# Run with stdio protocol
./run-flexible-stdio.sh

# Run with HTTP protocol
./run-flexible-http.sh

Creating Custom Providers

See the documentation in pkg/plugin/README.md and examples in examples/providers/ for details on how to create custom tool providers.

Documentation

The project includes comprehensive documentation:

  • READMEs: Overview and usage instructions in each directory
  • Code Comments: Detailed comments for all public interfaces
  • Example Code: Working examples of providers and server
  • Command-Line Help: Documentation for command-line options

Future Extensions

The platform design allows for several future extensions:

  • Dynamic Loading: Support for loading providers from shared libraries
  • Remote Providers: Distributed providers running on different machines
  • Authentication: Provider and tool authentication system
  • Monitoring: Metrics and monitoring for tool executions
  • Admin Interface: Web-based administration console

Conclusion

The Cortex platform provides a flexible and extensible foundation for building MCP servers that can interact with various backend services through a standardized protocol. The clean separation between the core platform and specific tool implementations allows for independent evolution and ensures maintainability and scalability.