Introduction
HostIt is a web application that leverages LangChain’s Model Context Protocol (MCP) to connect with and manage multiple AI model servers. The application serves as a central hub for registering, organizing, and accessing tools from various MCP-compliant servers.
Core Architecture
MCP Integratio
The application implements a server-centric approach to MCP integration, where:
- Servers are registered as endpoints with the system
- Tools are accessed through these registered servers
- LangChain’s MultiServerMCPClient is utilized to connect to multiple servers simultaneously
Key Components
Server Management
- Server Registration: Users can register MCP-compliant servers
- Server Groups: Servers can be organized into logical groups
- User-Specific Servers: Each user has access to their own server configurations
- Enable/Disable Functionality: Servers can be toggled on/off as needed
MCP Server Profiles
- Multiple Profiles: Users can create multiple named profiles/groups of MCP server combinations
- Optimal Combinations: Ability to save effective combinations of servers that work well together
- Bulk Enable/Disable: Toggle entire groups of servers on/off with a single action
- Quick Switching: Easily switch between different server group configurations
- Profile Management: Create, edit, delete, and share server profiles
Persistence Layer
- Supabase Integration: Server configurations and groups are stored in Supabase
- In-Memory Fallback: Local storage options available when Supabase is not connected
- Profile Storage: Saved profiles persist across sessions for each user
API Endpoints
/api/servers: Endpoints for server registration and management/api/tools: Endpoints for accessing tools from registered servers/api/chat: Chat-related functionality that leverages MCP tools/api/profiles: Endpoints for managing MCP server profiles and combinations
Implementation Details
Server Service
The server service is responsible for:
- Managing server connections
- Registering new servers
- Providing access to server tools
- Maintaining server status
Client Wrapper
A client wrapper encapsulates LangChain’s MultiServerMCPClient to:
- Simplify connections to multiple servers
- Provide a unified interface for tool access
- Handle connection errors and retries
Server Storage
The storage mechanism:
- Persists server configurations in Supabase
- Handles server group organization
- Provides CRUD operations for server management
- Supports user-specific data isolation
Profile Manager
The profile manager handles:
- Creating and storing combinations of MCP servers
- Enabling/disabling server groups as units
- Tracking effective combinations discovered by users
- Providing a system for naming and describing different configurations
Future Enhancements
- Enhanced server authentication methods
- Tool discovery and categorization
- Performance monitoring for server connections
- More sophisticated server grouping mechanisms
- Advanced error handling and recovery strategies
- Profile sharing and collaboration features
- Automatic profile optimization based on usage patterns
- Profile performance metrics and analytics