API features

Image QR reading

Read one QR code from a supported image.

Exact decoded text

Preserve spaces, line breaks and multilingual text.

Content categories

Identify website, Wi-Fi, email and text payloads.

Corner coordinates

Locate the decoded code within the image.

Upload or image link

Submit an image file or a public image URL.

Data-entry workflows

Connect QR reading to check-in and inventory apps.

API Document

HTTP Protocol:HTTPS

HTTP Method:POST

HTTP Endpoint:https://api.gugudata.io/v1/barcode/qrcode/decode

Response Type:application/json; charset=utf-8

DEMO Endpoint:https://api.gugudata.io/v1/barcode/qrcode/decode/demo

Live Demo:Try Interactive Demo

Postman Collection:Run in Postman

API Request Parameters

Name	Type	Is Required	Default Value	Remark
appkey	string	true	YOUR_APPKEY	API key used to authenticate the request.
file	file	false	N/A	Exactly one of file or file_url. PNG, JPEG, static WebP or BMP; maximum 10 MiB, 8192 pixels per side and 16 million pixels.
file_url	string	false	https://gugudata.io/assets/demo/qrcode-decode-demo.png	Public HTTP(S) image URL, at most 2048 characters; mutually exclusive with file.

API Response Parameters

Name	Type	Remark
format	string	Always QR_CODE.
parsed	string	Exact decoded text, identical to raw.
points	array<array<number>>	Four [x, y] corners in top-left, top-right, bottom-right, bottom-left order; empty if unavailable. Coordinates use the original image dimensions.
raw	string	Exact decoded text without trimming or normalization.
type	string	URI, WIFI, EMAIL or TEXT. Decoded links are not visited.

API Response Status Codes

Status Code	Explanation of Status Code	Remarks
200	Request processed successfully.	Some endpoints expose a separate application-level status field in the response body, such as `dataStatus.statusCode`.
400	Invalid request parameters or request format.	Check required fields, data types, and request body format.
401	Missing or unknown application key.	Provide a valid `appkey` with the request.
403	The application key is recognized but access is not allowed.	The key may be expired, inactive, or not permitted for the requested API.
413	Image exceeds the file or pixel limit.	Use at most 10 MiB, 8192 pixels per side and 16 million pixels.
422	Image is unsupported or contains no readable QR code.	Use a clear PNG, JPEG, static WebP or BMP image.
429	Request rate or trial usage limit exceeded.	Reduce request frequency and retry with backoff. If a trial allowance is exhausted, check Trial Keys for remaining requests and subscribe to continue.
500	Internal service error.	Retry later or contact support if the error persists.
502	Image download or decoding failed.	Check the image link and try again later.
503	QR decoding is temporarily unavailable.	Try again later.

Remote MCP

AI client access

Use this API through GuGuData Remote MCP

Connect your AI client once, authorize in the browser, and the client can use the GuGuData API tools available to your account. You do not need to paste an appkey into the MCP client.

Endpoint https://mcp.gugudata.io/mcp

Open MCP Guide

Generic MCP configuration

{
  "mcpServers": {
    "gugudata": {
      "url": "https://mcp.gugudata.io/mcp",
      "transportType": "streamable-http"
    }
  }
}

Code Snippets

Run in Postman Open LLM Page

Frequently asked questions

Common questions about request limits, trials, renewal, and cancellation.

What does the 5 requests per second limit mean?

It is a request-rate limit, not a concurrency allowance. Keep your request rate at or below 5 per second. If the service returns a rate-limit response, reduce the frequency and retry with backoff.

Is total paid usage limited?

There is no total request cap during an active paid subscription and no usage-based overage charge.

How does the free trial work?

Each account can receive a limited trial key. Requests are shared across APIs in the same category. Check Trial Keys for the exact allowance and remaining requests.

How do renewal and cancellation work?

The plan renews annually until canceled. Manage or cancel the renewal from Dashboard → Orders & Billing. Access continues through the paid period after cancellation. See the Terms of Service for the current refund policy. If the billing portal is unavailable, contact support.

Technical support

Need help choosing an API or getting started?

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