API features

Forty one-dimensional formats

Generate UPC, EAN, Code 39, Code 128, ISBN, ITF-14, PostNet, Pharmacode, and other established barcode formats.

Barcode-aware validation

Apply format-specific content, length, and checksum rules before an image is generated.

Configurable image dimensions

Set the output width and height to fit labels, documents, packaging, and application interfaces.

Reusable HTTPS image URL

Receive a hosted PNG barcode URL that can be downloaded or placed into downstream documents.

Retail and publishing workflows

Create product identifiers, ISBN barcodes, price labels, and printable catalog assets.

Logistics and inventory workflows

Generate machine-readable labels for inventory, shipments, postal operations, and asset tracking.

API Document

HTTP Protocol:HTTPS

HTTP Method:POST

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

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

DEMO Endpoint:https://api.gugudata.io/v1/barcode/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.
type	string	true	CODE128	One-dimensional barcode symbology. Supported values: UPCA, UPCE, UPCSupplemental2Digit, UPCSupplemental5Digit, EAN13, EAN8, Interleaved2Of5, Interleaved2Of5Mod10, Standard2Of5, Standard2Of5Mod10, Industrial2Of5, Industrial2Of5Mod10, Code39, Code39Extended, Code39Mod43, Codabar, PostNet, Bookland, ISBN, JAN13, MsiMod10, Msi2Mod10, MsiMod11, MsiMod11Mod10, ModifiedPlessey, Code11, Usd8, Code32, Ucc12, Ucc13, Logmars, Code128, Code128A, Code128B, Code128C, Itf14, Code93, Telepen, Fim, and Pharmacode.
content	string	true	123456789012	Content to encode, from 1 to 512 characters. Format and checksum requirements depend on the selected barcode symbology.
width	integer	true	290	Output width in pixels. Use 1 for the legacy default width of 290, or an integer from 64 to 2048.
height	integer	true	120	Output height in pixels. Use 1 for the legacy default height of 120, or an integer from 32 to 2048.

API Response Parameters

Name	Type	Remark
url	string	HTTPS CDN URL of the generated PNG barcode image.

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.
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.
503	Upstream service unavailable.	Retry later; the requested upstream dependency is temporarily unavailable.

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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