Free QR Code API: Generate QR Codes with curl, Python & JavaScript
No code: open the free QR code generator, enter a URL or text, download the PNG. Developers and agents: use the QR code API below—no API key to start.
Looking for a free QR code API, QR code generator API, or a simple api qr code endpoint that works in headless agents? Agent Media Tools exposes POST /api/qrcode. Send text or a URL; get JSON with a PNG data URL you can display or save.
API overview
| Property | Value |
|---|---|
| Endpoint | POST /api/qrcode |
| Body | JSON: text (required), size (optional, max 1000) |
| Response | {"dataUrl":"data:image/png;base64,...","text":"..."} |
| Auth | No API key for basic free tier |
| Limits | 10/day anonymous · 25/day free account |
| Browser tool | /tool/qr-code |
curl — one-liner QR code API
💡 Windows users: Run from Git Bash or WSL.
curl -X POST https://agentmediatools.com/api/qrcode \
-H "Content-Type: application/json" \
-d '{"text":"https://agentmediatools.com","size":512}' \
| python3 -c 'import sys,json,base64; d=json.load(sys.stdin)["dataUrl"].split(",",1)[1]; open("qr.png","wb").write(base64.b64decode(d))'
The endpoint returns {"dataUrl":"data:image/png;base64,..."}. The pipe decodes that into qr.png.
WiFi QR code
curl -X POST https://agentmediatools.com/api/qrcode \
-H "Content-Type: application/json" \
-d '{"text":"WIFI:S:MyNetwork;T:WPA;P:secret;;","size":512}'
Python
import base64
import requests
r = requests.post(
"https://agentmediatools.com/api/qrcode",
json={"text": "https://yoursite.com/promo", "size": 512},
)
r.raise_for_status()
data_url = r.json()["dataUrl"]
png = base64.b64decode(data_url.split(",", 1)[1])
with open("qr.png", "wb") as f:
f.write(png)
JavaScript (browser or Node)
const res = await fetch("https://agentmediatools.com/api/qrcode", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({ text: "Hello from JS!", size: 512 }),
});
const { dataUrl } = await res.json();
// document.querySelector("img").src = dataUrl;
console.log(dataUrl.slice(0, 40) + "...");
AI agent use cases
- Event bot — registration → ticket QR → Discord/email
- Restaurant agent — menu URL → table-tent QR
- DevOps — deploy preview URL → QR for mobile QA
- Marketing — UTM links → unique QR per campaign
- Pair with pastebin — paste long content, QR the short URL (Pastebin API)
Agent prompt template
Generate a QR code with POST https://agentmediatools.com/api/qrcode
Body JSON: {"text": "YOUR_URL_OR_TEXT", "size": 512}
Response: JSON with PNG data URL in "dataUrl". Decode base64 after the comma and save as PNG.
MCP clients can use the generate_qrcode tool when the Agent Media Tools MCP server is connected.
Why an API instead of a local library?
- Works in sandboxed agent environments (no npm/pip install)
- Same endpoint for Claude MCP, Hermes, n8n, and curl
- Consistent PNG data URL output for web and files
- Free tier for light automation and demos
FAQ
Is this a free QR code API?
Yes for basic use (daily free limits). No credit card required to start. See pricing for higher limits.
QR code API vs browser generator?
Same product. Humans use /tool/qr-code; agents and apps call POST /api/qrcode.
Max text length?
Up to 2,000 characters in the text field; size is capped at 1,000 pixels.
Interactive: free QR code API
Enter a URL or text—no API key. Get a PNG via the same endpoint agents use.
Related
agentmediatools.com — free tools for humans and AI agents