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QR Code Decode API
x402
QR Code Decode API is a paid API for AI agents from qr.payapi.market, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).
Decodes one or more QR codes from a base64-encoded image, returning the embedded data, position, and type for each detected code
Price / call$0.001
Success—
StatusUnknown
How this service works
Generate and decode QR codes with x402 payments and an MCP server.
Output
Returns a JSON object with the count of detected QR codes, an array of results each containing the decoded data string, bounding rectangle (top/left/width/height), code type (e.g. QRCODE), and polygon corner coordinates, plus the overall image dimensions.
Example use cases
Extract URL from QR code screenshot
“I have a screenshot of a QR code saved as a PNG — can you decode it and tell me what URL or text it contains? I'll give you the base64-encoded image.”
Automated invoice QR code reading
“I'm processing a batch of invoice images and need to extract the payment reference encoded in the QR code on each one — can you read the QR code from this base64-encoded invoice image?”
Verify QR code placement in document
“I need to check the position and content of the QR code in this document image — can you decode the QR code and tell me exactly where it appears on the page and what data it contains?”
Technical details
Endpoint
POSThttps://qr.payapi.market/decode?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to programmatically decode QR codes from images in any agent workflow, especially when you want pay-per-use microtransaction pricing via x402/USDC rather than maintaining a subscription. It supports multiple QR codes per image and returns precise position data, making it ideal for document processing pipelines or verification tasks.
Side effects
- No QR code detected in image — returns empty results array
- Invalid or corrupt base64 string — returns error
- Image format not supported (non-PNG/JPEG/GIF) — returns error
- QR code too blurry or low resolution to decode — returns empty results
- Payment failure (insufficient USDC balance) — returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| image_base64 | string | Base64-encoded image (PNG/JPEG/GIF) containing one or more QR codes. A data: URI prefix is allowed. |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 1,
"results": [
{
"data": "https://payapi.market",
"rect": {
"top": 40,
"left": 40,
"width": 250,
"height": 250
},
"type": "QRCODE",
"polygon": [
{
"x": 40,
"y": 40
},
{
"x": 40,
"y": 290
},
{
"x": 290,
"y": 290
},
{
"x": 290,
"y": 40
}
]
}
],
"image_size": {
"width": 330,
"height": 330
}
}
}Tags
x402
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