SDK-COMPLIANCE-REVIEW.md•5.72 kB
# RDW MCP Server - SDK Compliance Review & Updates
## Summary of Changes Made
### ✅ **Fixed Issues**
1. **Updated to Modern SDK API**
- Changed from deprecated `server.tool()` to `server.registerTool()`
- Added proper `title` field for better UI display
- Restructured `inputSchema` to modern format
2. **Fixed Server Configuration**
- Updated server name to match package name: `"rdw-mcp-server"`
- Updated version to match package.json: `"2.1.0"`
- Removed unused empty capabilities object
- Updated USER_AGENT to correct version
3. **Added Streamable HTTP Transport Support**
- ✅ **NEW**: Added stateless HTTP transport support
- ✅ **NEW**: Express.js server with `/mcp` endpoint
- ✅ **NEW**: Health check endpoint at `/health`
- ✅ **NEW**: Command line arguments: `--http` and `--port=N`
- ✅ **NEW**: CORS support for remote usage
- ✅ **NEW**: Proper error handling for HTTP requests
- ✅ **NEW**: Stateless mode - new server instance per request
4. **Improved SDK Compliance**
- Now follows the recommended patterns from the official TypeScript SDK
- Better structured for future SDK updates
- Cleaner, more maintainable code structure
- Supports both stdio and HTTP transports
### 📋 **Current Implementation Status**
**✅ COMPLIANT:**
- ✅ Uses `McpServer` from `@modelcontextprotocol/sdk/server/mcp.js`
- ✅ Uses `StdioServerTransport` for stdio communication
- ✅ Uses `StreamableHTTPServerTransport` for HTTP communication
- ✅ Stateless HTTP mode (no session management)
- ✅ Proper async/await patterns
- ✅ Zod schema validation
- ✅ Modern `registerTool()` API
- ✅ Proper error handling with try/catch
- ✅ Correct server initialization and connection
- ✅ Title field for better UI display
- ✅ Express.js integration with CORS support
- ✅ Health check endpoint
- ✅ Command line argument parsing
**🔧 COULD BE ENHANCED:**
- Could add Resources for static RDW endpoint documentation
- Could use ResourceLinks to reference RDW data sources
- Could add Prompts for common vehicle lookup scenarios
- Could implement progress indicators for long API calls
### 🎯 **Comparison with Official SDK Examples**
**Our Implementation:**
```typescript
// Stdio transport
const server = new McpServer({
name: "rdw-mcp-server",
version: "2.1.0",
});
server.registerTool(
"rdw-license-plate-lookup",
{
title: "RDW License Plate Lookup",
description: "Look up ALL available Dutch vehicle information...",
inputSchema: {
kenteken: z.string().min(1).describe("Dutch license plate (kenteken) to look up"),
}
},
async ({ kenteken }) => {
// Implementation
}
);
// HTTP transport (stateless)
app.post('/mcp', async (req: Request, res: Response) => {
const server = createRDWServer();
const transport = new StreamableHTTPServerTransport({
sessionIdGenerator: undefined, // Stateless mode
});
await server.connect(transport);
await transport.handleRequest(req, res, req.body);
});
```
**Official SDK Example:**
```typescript
const server = new McpServer({
name: "demo-server",
version: "1.0.0"
});
server.registerTool("add",
{
title: "Addition Tool",
description: "Add two numbers",
inputSchema: { a: z.number(), b: z.number() }
},
async ({ a, b }) => ({
content: [{ type: "text", text: String(a + b) }]
})
);
```
✅ **PERFECT MATCH** - Our implementation now follows the exact same pattern!
### 📚 **Optional Future Enhancements**
Based on the SDK documentation, we could add:
1. **Resources** for RDW documentation:
```typescript
server.registerResource(
"rdw-datasets",
"rdw://datasets",
{
title: "RDW Datasets Documentation",
description: "Information about available RDW datasets"
},
async (uri) => ({
contents: [{
uri: uri.href,
text: "List of available RDW datasets and their endpoints..."
}]
})
);
```
2. **Prompts** for common scenarios:
```typescript
server.registerPrompt(
"vehicle-summary",
{
title: "Vehicle Summary",
description: "Generate a concise vehicle summary",
argsSchema: { kenteken: z.string() }
},
({ kenteken }) => ({
messages: [{
role: "user",
content: {
type: "text",
text: `Please provide a concise summary for vehicle ${kenteken}`
}
}]
})
);
```
3. **Progress Indicators** for long requests:
```typescript
// For multiple API calls, could implement progress updates
// (Requires client support)
```
### 🎉 **Conclusion**
The RDW MCP Server is now **fully compliant** with the official TypeScript SDK patterns and best practices. The implementation:
- ✅ Uses modern SDK APIs
- ✅ Follows official examples exactly
- ✅ Maintains all existing functionality
- ✅ Is ready for future SDK updates
- ✅ Provides better UI integration with title fields
- ✅ Has clean, maintainable code structure
- ✅ **NEW**: Supports both stdio and HTTP transports
- ✅ **NEW**: Stateless HTTP mode for scalability
- ✅ **NEW**: Express.js integration with CORS
- ✅ **NEW**: Health check endpoint
- ✅ **NEW**: Command line argument support
### 🚀 **Usage Examples**
**Stdio Mode (Default):**
```bash
rdw-mcp
# or
node build/index.js
```
**HTTP Mode:**
```bash
rdw-mcp --http
# or
rdw-mcp --http --port=3000
# or
node build/index.js --http --port=8080
```
**Health Check:**
```bash
curl http://localhost:3000/health
```
**MCP HTTP Endpoint:**
```bash
curl -X POST http://localhost:3000/mcp \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","id":1,"method":"initialize",...}'
```
The server can be used as a reference implementation for other MCP servers using the TypeScript SDK!