Barcode Generator

Overview

Send text data and select either Code 128 or Code 39 encoding, with the option to hide the text label beneath the bars. The API renders the image and returns a temporary download URL, image filename, and Unix expiration timestamp. Paid plans can customize line and background colors.

Endpoint

One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.

1
2
3
4
5
6
7
8
9
10

curl -X POST https://api.apiverve.com/v1/barcodegenerator \
  -H "x-api-key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "data": "51001544700",
  "type": "code128",
  "lineColor": "#000000",
  "backgroundColor": "#FFFFFF",
  "displayValue": true
}'

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

const res = await fetch('https://api.apiverve.com/v1/barcodegenerator', {
  method: 'POST',
  headers: {
    'x-api-key': 'your_api_key_here',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
  "data": "51001544700",
  "type": "code128",
  "lineColor": "#000000",
  "backgroundColor": "#FFFFFF",
  "displayValue": true
}),
});

if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);

const { data } = await res.json();
console.log(data);

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

import requests

res = requests.post(
    "https://api.apiverve.com/v1/barcodegenerator",
    headers={"x-api-key": "your_api_key_here"},
    json={
    "data": "51001544700",
    "type": "code128",
    "lineColor": "#000000",
    "backgroundColor": "#FFFFFF",
    "displayValue": True
},
    timeout=15,
)
res.raise_for_status()

print(res.json()["data"])

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

package main

import (
	"fmt"
	"io"
	"net/http"
	"strings"
)

func main() {
	body := strings.NewReader(`{
  "data": "51001544700",
  "type": "code128",
  "lineColor": "#000000",
  "backgroundColor": "#FFFFFF",
  "displayValue": true
}`)
	req, _ := http.NewRequest("POST", "https://api.apiverve.com/v1/barcodegenerator", body)
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("x-api-key", "your_api_key_here")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.

Authentication

Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.

Parameters

Sent as JSON in the request body. Premium parameters are accepted on every plan but only take effect on plans that include them.

Response

Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.

1
2
3
4
5
6
7
8
9
10
11

{
  "status": "ok",
  "error": null,
  "data": {
    "imageName": "cc85680f-a1d0-4627-89ff-7d7e53663a2b.png",
    "format": ".png",
    "type": "CODE128",
    "expires": 1766010012598,
    "downloadURL": "https://storage.googleapis.com/apiverve/APIData/barcodegenerator/cc85680f-a1d0-4627-89ff-7d7e53663a2b.png?GoogleAccessId=635500398038-compute%40developer.gserviceaccount.com&Expires=1766010012&Signature=cV6ANXGGaVDdl5SOFZt3xm2haHBnOklW1zXQICvJlGNlF4kwYVP9i%2F1RAN8NBGxSUiMk4Zcro%2FJUb3W%2Fwy8jA86pyEXTwIjNAiGW94ikpKSXs6%2FiV42Rwv6u2gX%2B2FH7XYyixlwJ%2B%2FHpfGcvka6u01FDk%2F2TUcR7%2FxsZ%2FmXPU2KTrzsI6XttCGBcHhex3LdTv%2F8tzMJbSshbZn%2BGcRTddwv6dC4lCcTtGE6Bl2zqY9s92KIr9X%2F4xj34q4XKBzywgXES57QaVhZeGPPOOUfLtI3pAN8fVSyM%2B9NBMU7R46xyqJ0J8PSVpQZhhAHn03T%2B40rcNp26GXqauM9K%2BLwZRw%3D%3D"
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.

Start from a template

A working app built on this API, ready to deploy with your own key. Vercel asks for the key when you deploy; the code is on GitHub to change first.

Barcode Generator

Make Code 128 and Code 39 barcode images for products, shelves and shipping labels.

• Node.js
• Express

Deploy to VercelSee the template →

Use cases

Warehouse Inventory Labeling

Logistics managers turn incoming SKU numbers into Code 128 barcodes to print adhesive tracking tags for pallet racks.

Retail Order Invoicing

When generating digital receipts, e-commerce storefronts append Code 39 barcode images so cashiers can scan returns at store counters.

Event Ticket Production

Embed unique scannable barcodes on printable PDF conference badges before sending confirmation emails to attendees.

Internal Asset Tracking

IT teams create compact Code 128 tags without bottom text labels to catalog laptops and monitors in inventory databases.

Other ways to use Barcode Generator

Set up Barcode Generator on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.

Related

More in Data Generation: