Firestore MCP Server

import { McpServer, ResourceTemplate } from "@modelcontextprotocol/sdk/server/mcp.js"; import { FirestoreClient } from "../firestore/client.js"; import { PermissionManager } from "../permissions/manager.js"; export function registerSubcollectionResources( server: McpServer, firestoreClient: FirestoreClient, permissionManager: PermissionManager ) { // Register subcollection resource template server.resource( "subcollection", new ResourceTemplate("firestore://path/{path}", { list: undefined }), async (uri, { path }) => { // Extract path components const fullPath = path as string; const pathParts = fullPath.split('/'); const rootCollection = pathParts[0]; // Check permissions if (!permissionManager.hasPermission(rootCollection, 'read')) { throw new Error(`Access denied to path: ${fullPath}`); } try { // Determine if this is a collection or document path const isCollection = pathParts.length % 2 === 1; if (isCollection) { // Get collection documents const documents = await firestoreClient.getCollectionByPath(fullPath); return { contents: [{ uri: uri.href, text: JSON.stringify(documents, null, 2), mimeType: "application/json" }] }; } else { // Get single document const document = await firestoreClient.getDocumentByPath(fullPath); if (!document) { throw new Error(`Document not found: ${fullPath}`); } return { contents: [{ uri: uri.href, text: JSON.stringify(document, null, 2), mimeType: "application/json" }] }; } } catch (error) { console.error(`Error reading path ${fullPath}:`, error); throw new Error(`Failed to read path ${fullPath}: ${error instanceof Error ? error.message : String(error)}`); } } ); }