# 🚀 MCP Firebird v2.2.0 - Complete SSE Transport Implementation
## 🎯 Major Release Highlights
This release brings **complete SSE (Server-Sent Events) transport support** to MCP Firebird, making it fully compatible with the MCP Inspector and modern MCP clients while maintaining 100% backwards compatibility with existing STDIO implementations.
## ✨ New Features
### 🌐 **SSE Transport Support**
- **Full SSE Implementation**: Complete Server-Sent Events transport using official MCP SDK v1.13.2
- **MCP Inspector Compatible**: Works seamlessly with `npx @modelcontextprotocol/inspector`
- **Backwards Compatible Server**: Supports both modern and legacy MCP clients
- **Multi-Protocol Support**: Single server instance handles STDIO, SSE, and HTTP simultaneously
### 🔧 **Technical Improvements**
- **Latest MCP SDK**: Updated to Model Context Protocol TypeScript SDK v1.13.2
- **Modern API Implementation**: Using official `registerTool()`, `registerPrompt()` methods
- **Enhanced Session Management**: Robust HTTP session handling with automatic cleanup
- **Windows Path Support**: Proper escaping and handling of Windows file paths with backslashes
### 🌐 **New HTTP Endpoints**
- **Modern Streamable HTTP**: `POST/GET/DELETE /mcp` for latest MCP clients
- **Legacy SSE**: `GET /sse` for backwards compatibility with older clients
- **Legacy Messages**: `POST /messages` for complete client support
## 🛠️ **Usage Examples**
### SSE Transport (New!)
```bash
# Start SSE server
npx mcp-firebird@latest --transport-type sse --sse-port 3003 \
--database "F:\\Proyectos\\SAI\\AUTOSERVICIO_LA_PAZ.FDB" \
--user SYSDBA --password masterkey
# Connect MCP Inspector via SSE
npx @modelcontextprotocol/inspector http://localhost:3003/sse
```
### STDIO Transport (Preserved)
```bash
# Traditional STDIO (unchanged)
npx @modelcontextprotocol/inspector \
npx mcp-firebird@latest --transport-type stdio \
--database "F:\\Proyectos\\SAI\\AUTOSERVICIO_LA_PAZ.FDB" \
--user SYSDBA --password masterkey
```
## 🔒 **Stability & Compatibility**
### ✅ **Backwards Compatibility**
- **STDIO Preserved**: All existing STDIO functionality maintained without changes
- **No Breaking Changes**: Existing configurations continue to work
- **Same CLI Interface**: Familiar command-line arguments and options
### 🏗️ **Production Ready**
- **Thoroughly Tested**: Verified with real Firebird databases
- **Stable Connections**: No ECONNRESET errors in SSE transport
- **Cross-Platform**: Enhanced Windows and Linux compatibility
- **Error Handling**: Comprehensive error recovery and logging
## 📊 **Technical Details**
### **Architecture**
- **Express.js Integration**: Clean REST API implementation
- **Session Management**: UUID-based session tracking with automatic cleanup
- **Transport Abstraction**: Unified server handling multiple transport types
- **Modern TypeScript**: Full type safety with latest MCP SDK types
### **Performance**
- **Concurrent Sessions**: Support for multiple simultaneous connections
- **Memory Management**: Automatic cleanup of disconnected sessions
- **Efficient Routing**: Optimized Express middleware for MCP protocols
## 🐛 **Bug Fixes**
- **Windows File Paths**: Fixed backslash escaping in database file paths
- **Path-to-regexp**: Resolved compatibility issues with Express v5 and MCP SDK
- **Session Cleanup**: Fixed memory leaks in HTTP session management
- **Error Propagation**: Improved error handling and user feedback
## 📈 **Developer Experience**
### **Enhanced Debugging**
- **Detailed Logging**: Comprehensive debug and info logging
- **Session Tracking**: Clear session lifecycle management
- **Error Context**: Better error messages with actionable information
### **Documentation**
- **Complete Examples**: Working examples for both transport types
- **Configuration Guides**: Step-by-step setup instructions
- **Troubleshooting**: Common issues and solutions
## 🎯 **Migration Guide**
### **For Existing Users**
No migration required! Your existing STDIO configurations will continue to work exactly as before.
### **To Use SSE Transport**
Simply add the transport type parameter:
```bash
# Add these parameters to your existing command
--transport-type sse --sse-port 3003
```
## 🔮 **What's Next**
- **Resource Support**: Re-enable dynamic resources with path-to-regexp fixes
- **Enhanced Security**: Additional authentication and authorization options
- **Performance Optimization**: Further improvements to concurrent session handling
- **Extended Protocol Support**: Additional MCP transport implementations
## 🙏 **Acknowledgments**
Special thanks to the Model Context Protocol team for the excellent SDK and documentation that made this implementation possible.
## 📞 **Support**
- **GitHub Issues**: [Report bugs and feature requests](https://github.com/PuroDelphi/mcpFirebird/issues)
- **Documentation**: [Complete setup guides](https://github.com/PuroDelphi/mcpFirebird/tree/main/docs)
- **Examples**: [Working code examples](https://github.com/PuroDelphi/mcpFirebird/tree/main/examples)
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**Full Changelog**: [v2.1.0...v2.2.0](https://github.com/PuroDelphi/mcpFirebird/compare/v2.1.0...v2.2.0)