File Operation MCP Server

import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js'; import { z } from 'zod'; import fs from 'fs-extra'; import path from 'path'; import { PDFDocument } from 'pdf-lib'; export default function registerMergePdfTool(server: McpServer) { server.registerTool( 'merge-pdf', { title: 'Merge PDF Files', description: 'Merges multiple PDF files into a single PDF document.', inputSchema: { input_files: z.array(z.string()).describe('Array of PDF file paths to merge'), output_path: z.string().describe('Output path for the merged PDF file'), }, }, async (params: { input_files: string[]; output_path: string }) => { try { const { input_files, output_path } = params; // Validate input files exist for (const file of input_files) { if (!(await fs.pathExists(file))) { return { content: [{ type: 'text', text: `Error: Input file does not exist: ${file}` }], isError: true, }; } } // Ensure output directory exists await fs.ensureDir(path.dirname(output_path)); // Create a new PDF document const mergedPdf = await PDFDocument.create(); // Process each input PDF for (const filePath of input_files) { const fileBuffer = await fs.readFile(filePath); const pdf = await PDFDocument.load(fileBuffer); // Copy all pages from the current PDF to the merged PDF const copiedPages = await mergedPdf.copyPages(pdf, pdf.getPageIndices()); copiedPages.forEach((page) => mergedPdf.addPage(page)); } // Save the merged PDF const mergedPdfBytes = await mergedPdf.save(); await fs.writeFile(output_path, mergedPdfBytes); return { content: [ { type: 'text', text: `Successfully merged ${input_files.length} PDF files into: ${output_path}`, }, ], }; } catch (error: any) { return { content: [{ type: 'text', text: `Error merging PDFs: ${error.message}` }], isError: true, }; } } ); }