QR Code & UPI Payment Generator API

// Binary — get image directly
const response = await fetch('https://api.corenexis.com/qr-barcode/v1?type=qr&data=https://google.com', {
  headers: { 'X-API-KEY': 'your_api_key' }
});
const blob = await response.blob();
document.getElementById('qr').src = URL.createObjectURL(blob);

// URL — get JSON with CDN link
const res = await fetch('https://api.corenexis.com/qr-barcode/v1?type=qr&data=https://google.com&output=url', {
  headers: { 'X-API-KEY': 'your_api_key' }
});
const data = await res.json();
console.log('QR URL:', data.data.url);

import requests

headers = {"X-API-KEY": "your_api_key"}

# Binary — save image
response = requests.get("https://api.corenexis.com/qr-barcode/v1",
    headers=headers, params={"type": "qr", "data": "https://google.com"})
with open("qr.png", "wb") as f:
    f.write(response.content)

# URL — get JSON
response = requests.get("https://api.corenexis.com/qr-barcode/v1",
    headers=headers, params={"type": "qr", "data": "https://google.com", "output": "url"})
print(response.json()["data"]["url"])

$ch = curl_init();
curl_setopt_array($ch, [
    CURLOPT_URL => "https://api.corenexis.com/qr-barcode/v1?type=qr&data=https://google.com&output=url",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => ["X-API-KEY: your_api_key"],
]);
$response = curl_exec($ch);
$data = json_decode($response, true);
echo "QR URL: " . $data["data"]["url"];

const params = new URLSearchParams({
  type: 'upi', pa: 'merchant@upi', pn: 'My Store',
  am: '499', tn: 'Order Payment', output: 'url'
});
const response = await fetch(`https://api.corenexis.com/qr-barcode/v1?${params}`, {
  headers: { 'X-API-KEY': 'your_api_key' }
});
const data = await response.json();
console.log('UPI QR:', data.data.url);

import requests
response = requests.get("https://api.corenexis.com/qr-barcode/v1",
    headers={"X-API-KEY": "your_api_key"},
    params={"type": "upi", "pa": "merchant@upi", "pn": "My Store",
            "am": "499", "tn": "Order Payment", "output": "url"})
print(response.json()["data"]["url"])

curl -H "X-API-KEY: your_api_key" \
  "https://api.corenexis.com/qr-barcode/v1?type=ean13&data=4006381333931&output=url"

curl -H "X-API-KEY: your_api_key" \
  "https://api.corenexis.com/qr-barcode/v1?type=upc&data=012345678905&output=url"

curl -H "X-API-KEY: your_api_key" \
  "https://api.corenexis.com/qr-barcode/v1?type=qr&data=https://example.com&logo=https://drive.google.com/file/d/1aBcDeFg/view?usp=sharing&output=url"

curl -X POST "https://api.corenexis.com/qr-barcode/v1" \
  -H "X-API-KEY: your_api_key" \
  -F "type=qr" -F "data=https://example.com" \
  -F "[email protected]" -F "size=500" -F "output=url"

curl -X POST "https://api.corenexis.com/qr-barcode/v1" \
  -H "X-API-KEY: your_api_key" \
  -F "type=image" -F "[email protected]" \
  -F "[email protected]" -F "size=500" -F "output=url"

const formData = new FormData();
formData.append('type', 'image');
formData.append('image', fileInput.files[0]);
formData.append('output', 'url');

const response = await fetch('https://api.corenexis.com/qr-barcode/v1', {
  method: 'POST',
  headers: { 'X-API-KEY': 'your_api_key' },
  body: formData
});
const data = await response.json();
console.log('QR:', data.data.url);
console.log('Image:', data.data.hosted_image_url);

{
  "success": true,
  "plan": "starter",
  "data": {
    "type": "upi",
    "format": "png",
    "mimetype": "image/png",
    "qr_size": 300,
    "logo": true,
    "url": "https://cdn.corenexis.com/upi_1711612800_b4e1c9f2.png",
    "size": 5.18,
    "expiry": "2026-03-28T16:00:00+00:00"
  },
  "usage": {
    "remaining": 486,
    "rate_limit": 20,
    "monthly_limit": 500
  }
}

{
  "success": true,
  "plan": "starter",
  "data": {
    "type": "code128",
    "format": "png",
    "mimetype": "image/png",
    "width": 420,
    "height": 120,
    "logo": false,
    "url": "https://cdn.corenexis.com/code128_1711612800_c5d2a8b3.png",
    "size": 1.23,
    "expiry": "2026-03-28T16:00:00+00:00"
  },
  "usage": {
    "remaining": 485,
    "rate_limit": 20,
    "monthly_limit": 500
  }
}

{
  "success": true,
  "plan": "pro",
  "data": {
    "type": "image",
    "format": "png",
    "mimetype": "image/png",
    "qr_size": 500,
    "logo": false,
    "hosted_image_url": "https://cdn.corenexis.com/img_1711612800_f7a4c0d5.jpg",
    "hosted_image_expiry": "2026-04-27T14:00:00+00:00",
    "note": "Scan the QR code to view the image directly in any browser.",
    "url": "https://cdn.corenexis.com/image_1711612800_d6e3b9c4.png",
    "size": 6.85,
    "expiry": "2026-03-28T16:00:00+00:00"
  },
  "usage": {
    "remaining": 4988,
    "rate_limit": 30,
    "monthly_limit": 5000
  }
}

{
  "success": false,
  "code": "PARAM_LIMIT_EXCEEDED",
  "message": "Requested size (500) exceeds your plan limit (300). Reduce size or upgrade your plan.",
  "param": "max_qr_image_width",
  "provided": 500,
  "max_allowed": 300
}

{
  "success": false,
  "error": "Data too long for QR code. Mode: binary | Your length: 1500 | Max: 1273. Limits — Numeric: 4296 | Alphanumeric: 2611 | Binary/UTF-8: 1273 bytes."
}

{
  "success": false,
  "code": "RATE_LIMIT_EXCEEDED",
  "message": "Too many requests. Please wait before making another request."
}