APIs › Image, SVG, QR & Barcode › QR Code Decoder

QR Code Decoder

Decodes every QR code found in an image, returning payload, type and the bounding box of each symbol.

POST /v1/qr/decode $0.005 per call

Specification

Endpoint

POST /v1/qr/decode

Price

$0.005 per call · tier basic_data

Payment

x402 on X Layer (chain 196) · settled in USDG or USDT0 · schemes exact, aggr_deferred

Data source

Local sandboxed processing of the uploaded image

Timeout

60 seconds

Max request

20 MB

Version

1.0.0

Calling it

The first call returns a 402 with the payment challenge. Retry with a signed authorisation in the X-PAYMENT header — see the payment guide for the exact shape.

curl -i -X POST "https://api.dana-edu.pp.ua/v1/qr/decode" \
  -H "content-type: application/json" \
  -d '{ ... }'

Response

Real output, captured by running this endpoint at build time — not written by hand. Volatile fields such as timestamps are elided. Captured 2026-07-30.

{
  "symbols_found": 1,
  "symbols": [
    {
      "data": "https://dana-edu.pp.ua",
      "type": "QRCODE",
      "quality": 1,
      "orientation": "UP",
      "bounding_box": {
        "left": 16,
        "top": 16,
        "width": 100,
        "height": 100
      }
    }
  ],
  "dimensions": {
    "width": 132,
    "height": 132
  }
}

Every response is wrapped in the same envelope: data plus warnings, sources, confidence, informational_only and a measured processing_ms. See the envelope reference.

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