Do I need to sign up or create an API key?

No. QRGen does not require signup or an API key for its public QR API or MCP generate_qr tool.

One QR engine · every agent

AI QR Code Generator

Q: How does an AI agent call QRGen?

An agent can connect to https://qrgenapp.com/mcp and call the generate_qr tool, or request the REST endpoint at https://qrgenapp.com/api/qr with URL-encoded data.

Give Claude, ChatGPT, Codex, or an automated workflow one reliable way to create URL, WiFi, vCard, UPI, and text QR codes—without signup or an API key.

Start integrating Connect MCP

agent.logqrgen / live

› Make a WiFi QR for Café North

tool: generate_qr
type: wifi · format: png

✓ QR image URL returned

Works with your AI agent

Choose the connection your workflow already speaks.

Use a native tool protocol, a coding-agent guide, or a direct HTTP request. Every path reaches QRGen’s same generation engine.

01 / TOOL

MCP server

Connect the focused generate_qr tool over Streamable HTTP.

02 / CLAUDE

Claude Code

Add QRGen through MCP or call the API directly from the terminal.

03 / OPENAI

Codex & ChatGPT

Use MCP, function calling, GPT Actions, or a direct image URL.

04 / HTTP

REST API

Generate PNG, SVG, or JSON responses with a simple GET or POST request.

05 / AUTOMATE

n8n & Zapier

Drop QR creation into no-code workflows with HTTP Request or Webhooks.

Quickstart

From prompt to QR in three lines or fewer.

These compact patterns mirror the working examples in the LLM integration guide.

REST / curlPNG

curl "https://qrgenapp.com/api/qr?data=https%3A%2F%2Fexample.com" \
  -o qr-code.png

MCP / CodexConfig

[mcp_servers.qrgen]
url = "https://qrgenapp.com/mcp"

Chat responseMarkdown

![QR Code](https://qrgenapp.com/api/qr?
data=https%3A%2F%2Fexample.com&size=256)

Build with QRGen

Guides for every integration path.

01LLM integration guideTool definitions, response patterns, and system prompts↗ 02Official MCP serverSetup and prompts for the generate_qr tool↗ 03Claude Code integrationMCP config and terminal workflows↗ 04Codex & ChatGPT integrationFunction calling, Actions, and agent examples↗ 05Free QR API referenceEndpoints, parameters, formats, and rate limits↗ 06How LLMs generate QR codesA practical guide to AI-powered QR workflows↗

AI QR CODE GENERATOR FAQ

Is the AI QR code generator free?

Yes. QRGen’s public QR API and MCP server can generate QR codes for free, subject to the published rate limits.

Does QRGen need signup or an API key?

No. Your AI agent can use the public API or the MCP generate_qr tool without creating an account or managing an API key.

How does an AI agent call QRGen?

Connect the agent to https://qrgenapp.com/mcp and let it call generate_qr, or have it request /api/qr with URL-encoded content. See the API reference for all options.