OpenFoodFacts-mcp

import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js"; import { ListResourcesRequestSchema, ReadResourceRequestSchema, ListPromptsRequestSchema, GetPromptRequestSchema } from "@modelcontextprotocol/sdk/types.js"; import express from 'express'; import { setupStdioTransport, setupHttpTransport, logger } from './transport/transports.js'; import { serverConfig } from './config/server-config.js'; import { availableResources, routeResourceRequest, filterResourcesForStandardMode } from './resources/resource-registry.js'; import { registerTools } from './tools/index.js'; import { registerCodebaseNavigatorTools } from './tools/register-codebase-navigator.js'; import { registerContributorTools } from './tools/register-contributor-tools.js'; import { availablePrompts, getPromptMessages, filterPromptsForStandardMode } from './prompts/index.js'; import { setupRoots } from './roots/index.js'; /** * Start the MCP server with configured transports * The server can use either stdio (for VS Code extension) or HTTP (for browser clients) * * @param developerMode Whether to enable developer tools and resources */ export async function startServer(developerMode = false) { // Initialize the MCP server with our config using McpServer const server = new McpServer(serverConfig, { capabilities: { resources: {}, tools: {}, prompts: {}, sampling: {}, roots: {} } }); // Setup roots handling setupRoots(server); // Register core MCP tools (always enabled) registerTools(server, developerMode); // Conditionally register developer tools if (developerMode) { // Register Codebase Navigator tools for open source contributors registerCodebaseNavigatorTools(server); // Register custom contributor tools registerContributorTools(server); logger.info('Developer mode enabled: Contributor tools registered'); } // Set up resource listing handler server.server.setRequestHandler(ListResourcesRequestSchema, async () => { // If not in developer mode, filter out developer-only resources const resources = developerMode ? availableResources : filterResourcesForStandardMode(availableResources); return { resources: resources }; }); // Set up resource reading handler server.server.setRequestHandler(ReadResourceRequestSchema, async (request) => { const uri = request.params.uri; return await routeResourceRequest(uri, developerMode); }); // Set up prompts listing handler server.server.setRequestHandler(ListPromptsRequestSchema, async () => { // If not in developer mode, filter out developer-only prompts const prompts = developerMode ? availablePrompts : filterPromptsForStandardMode(availablePrompts); return { prompts: prompts }; }); // Set up prompt retrieval handler server.server.setRequestHandler(GetPromptRequestSchema, async (request) => { const promptName = request.params.name; const args = request.params.arguments; try { const messages = await getPromptMessages(promptName, args); return { messages }; } catch (error: unknown) { const errorMessage = error instanceof Error ? error.message : String(error); throw new Error(`Failed to get prompt: ${errorMessage}`); } }); // Check if we should use stdio or HTTP transport // Stdio is used for VS Code extension if (process.env.TRANSPORT === 'stdio') { await setupStdioTransport(server); } else { // HTTP is default, used for browser clients const app = express(); await setupHttpTransport(server, app); } return server; }