import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { z } from "zod";
import express from 'express';
import { setupStdioTransport, setupHttpTransport, logger } from './transport/transports.js';
import { serverConfig } from './config/server-config.js';
import { handleStaticResource } from './resources/static-resources.js';
import { registerTools } from './tools/index.js';
/**
* Start the MCP server with configured transports for food-aware consumers
* The server can use either stdio (for VS Code extension) or HTTP (for browser clients)
*/
export async function startServer() {
const server = new McpServer(serverConfig, {
capabilities: {
resources: {},
tools: {},
prompts: {}
}
});
registerTools(server);
server.registerResource(
'help',
'openfoodfacts://help',
{
title: 'Quick Help Guide',
description: 'How to use the Open Food Facts tools - quick reference',
mimeType: 'text/markdown'
},
async (uri) => handleStaticResource(uri.href)
);
server.registerResource(
'nutriscore-guide',
'openfoodfacts://nutriscore-guide',
{
title: 'Nutri-Score Guide',
description: 'Understanding Nutri-Score health ratings (A-E)',
mimeType: 'text/markdown'
},
async (uri) => handleStaticResource(uri.href)
);
server.registerResource(
'ecoscore-guide',
'openfoodfacts://ecoscore-guide',
{
title: 'Eco-Score Guide',
description: 'Understanding Eco-Score environmental ratings (A-E)',
mimeType: 'text/markdown'
},
async (uri) => handleStaticResource(uri.href)
);
server.registerResource(
'allergens-list',
'openfoodfacts://allergens-list',
{
title: 'Allergens Reference',
description: 'Common food allergens and where they hide',
mimeType: 'text/markdown'
},
async (uri) => handleStaticResource(uri.href)
);
server.registerResource(
'additives-guide',
'openfoodfacts://additives-guide',
{
title: 'Food Additives Guide',
description: 'Understanding E-numbers and food additives',
mimeType: 'text/markdown'
},
async (uri) => handleStaticResource(uri.href)
);
server.registerResource(
'nova-guide',
'openfoodfacts://nova-guide',
{
title: 'NOVA Processing Guide',
description: 'Understanding food processing levels (1-4)',
mimeType: 'text/markdown'
},
async (uri) => handleStaticResource(uri.href)
);
server.registerPrompt(
'analyze-product',
{
title: 'Analyze Product',
description: 'Get a detailed health analysis of any food product',
argsSchema: {
barcode: z.string().describe('Product barcode or name')
}
},
({ barcode }) => ({
messages: [
{
role: 'user',
content: {
type: 'text',
text: `Analyze the food product "${barcode}". Provide a comprehensive nutritional analysis including health implications, ingredient quality, allergens, and dietary considerations.`
}
}
]
})
);
server.registerPrompt(
'compare-products',
{
title: 'Compare Products',
description: 'Compare two products to find the healthier option',
argsSchema: {
product1: z.string().describe('First product (barcode or name)'),
product2: z.string().describe('Second product (barcode or name)')
}
},
({ product1, product2 }) => ({
messages: [
{
role: 'user',
content: {
type: 'text',
text: `Compare "${product1}" and "${product2}". Tell me which is healthier and why, comparing nutritional values, ingredients, and health scores.`
}
}
]
})
);
server.registerPrompt(
'find-healthy-alternatives',
{
title: 'Find Healthy Alternatives',
description: 'Find healthier alternatives to a product',
argsSchema: {
product: z.string().describe('Product to find alternatives for')
}
},
({ product }) => ({
messages: [
{
role: 'user',
content: {
type: 'text',
text: `I want healthier alternatives to "${product}". Search for similar products with better Nutri-Score ratings and fewer additives.`
}
}
]
})
);
server.registerPrompt(
'check-allergens',
{
title: 'Check Allergens',
description: 'Check if a product is safe for your allergies',
argsSchema: {
product: z.string().describe('Product barcode or name'),
allergens: z.string().describe('Your allergens (comma-separated)')
}
},
({ product, allergens }) => ({
messages: [
{
role: 'user',
content: {
type: 'text',
text: `Check if "${product}" is safe for someone allergic to: ${allergens}. Include any traces warnings.`
}
}
]
})
);
server.registerPrompt(
'whats-for-dinner',
{
title: "What's for Dinner?",
description: 'Get recipe ideas using a product',
argsSchema: {
product: z.string().describe('Main ingredient or product')
}
},
({ product }) => ({
messages: [
{
role: 'user',
content: {
type: 'text',
text: `Suggest healthy recipe ideas using "${product}" as a main ingredient. Include nutritional tips.`
}
}
]
})
);
if (process.env.TRANSPORT === 'stdio') {
await setupStdioTransport(server);
} else {
const app = express();
await setupHttpTransport(server, app);
}
return server;
}
