@modelcontextprotocol/sdk
Version:
Model Context Protocol implementation for TypeScript
70 lines • 2.37 kB
JavaScript
/**
* Example MCP server using the high-level McpServer API with outputSchema
* This demonstrates how to easily create tools with structured output
*/
import { McpServer } from '../../server/mcp.js';
import { StdioServerTransport } from '../../server/stdio.js';
import * as z from 'zod/v4';
const server = new McpServer({
name: 'mcp-output-schema-high-level-example',
version: '1.0.0'
});
// Define a tool with structured output - Weather data
server.registerTool('get_weather', {
description: 'Get weather information for a city',
inputSchema: {
city: z.string().describe('City name'),
country: z.string().describe('Country code (e.g., US, UK)')
},
outputSchema: {
temperature: z.object({
celsius: z.number(),
fahrenheit: z.number()
}),
conditions: z.enum(['sunny', 'cloudy', 'rainy', 'stormy', 'snowy']),
humidity: z.number().min(0).max(100),
wind: z.object({
speed_kmh: z.number(),
direction: z.string()
})
}
}, async ({ city, country }) => {
// Parameters are available but not used in this example
void city;
void country;
// Simulate weather API call
const temp_c = Math.round((Math.random() * 35 - 5) * 10) / 10;
const conditions = ['sunny', 'cloudy', 'rainy', 'stormy', 'snowy'][Math.floor(Math.random() * 5)];
const structuredContent = {
temperature: {
celsius: temp_c,
fahrenheit: Math.round(((temp_c * 9) / 5 + 32) * 10) / 10
},
conditions,
humidity: Math.round(Math.random() * 100),
wind: {
speed_kmh: Math.round(Math.random() * 50),
direction: ['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW'][Math.floor(Math.random() * 8)]
}
};
return {
content: [
{
type: 'text',
text: JSON.stringify(structuredContent, null, 2)
}
],
structuredContent
};
});
async function main() {
const transport = new StdioServerTransport();
await server.connect(transport);
console.error('High-level Output Schema Example Server running on stdio');
}
main().catch(error => {
console.error('Server error:', error);
process.exit(1);
});
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