it-tools-mcp/build/tools/id_generators/generate_qr_code/index.js

Full MCP 2025-06-18 compliant server with 121+ IT tools, logging, ping, progress tracking, cancellation, and sampling utilities

import { z } from "zod";
export function registerGenerateQr(server) {
    server.registerTool("generate_qr_code", {
        description: "Generate QR code for any text including URLs, WiFi networks, contact info, etc.",
        inputSchema: {
            text: z.string().describe("Text to encode in QR code (URLs, WiFi: WIFI:T:WPA;S:network;P:password;;, contact info, etc.)"),
            size: z.number().describe("Size multiplier (1-3)").optional(),
        },
        // VS Code compliance annotations
        annotations: {
            title: "Generate Qr Code",
            description: "Generate QR code for any text including URLs, WiFi networks, contact info, etc",
            readOnlyHint: false
        }
    }, async ({ text, size = 1 }) => {
        try {
            const QRCode = (await import("qrcode")).default;
            if (size < 1 || size > 3) {
                return {
                    content: [
                        {
                            type: "text",
                            text: "Size must be between 1 and 3.",
                        },
                    ],
                };
            }
            // Generate QR code as base64 data URL
            console.log(`[DEBUG] Generating QR code for: "${text}" with size: ${size}`);
            const dataUrl = await QRCode.toDataURL(text, {
                type: 'image/png',
                errorCorrectionLevel: 'M',
                width: Math.max(256, size * 128), // Minimum 256px, scales with size parameter
                margin: 2,
                color: {
                    dark: '#000000', // Black
                    light: '#FFFFFF' // White
                }
            });
            console.log(`[DEBUG] QR code generated successfully`);
            // Extract just the base64 data (remove the data:image/png;base64, prefix)
            const base64Data = dataUrl.split(',')[1];
            const markdown = `![QR Code](data:image/png;base64,${base64Data})`;
            return {
                content: [
                    {
                        type: "text",
                        text: `📱 QR Code for: "${text}"
\n📊 Data encoded: "${text}" (${text.length} characters)
🎯 Error correction: Medium (M)
📐 Image size: ${Math.max(256, size * 128)}x${Math.max(256, size * 128)} pixels
\n✅ This QR code can be scanned with any QR code reader app
💡 Generated using the 'qrcode' npm library!
\n---\n**Markdown for inline display:**\n${markdown}`,
                    },
                    {
                        type: "image",
                        data: base64Data,
                        mimeType: "image/png"
                    }
                ],
            };
        }
        catch (error) {
            console.error(`[DEBUG] QR code generation failed:`, error);
            return {
                content: [
                    {
                        type: "text",
                        text: `Error generating QR code: ${error instanceof Error ? error.message : 'Unknown error'}\n\nDebug info:\n- Text: \"${text}\"\n- Size: ${size}`,
                    },
                ],
            };
        }
        // Fallback return in case of unexpected behavior
        return {
            content: [
                {
                    type: "text",
                    text: "Unknown error: No response generated by qr-generate.",
                },
            ],
        };
    });
}