curl --request PUT \
  --url https://api.print.app/v2/products/{productId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "designIds": [
    "design_01J8Z9K2M3N4P5Q6R7S8T9V0W1"
  ],
  "variants": [
    {
      "id": "4401",
      "designIds": [
        "design_01J8ZB0C1D2E3F4G5H6J7K8M9N"
      ]
    }
  ]
}
'

import requests

url = "https://api.print.app/v2/products/{productId}"

payload = {
    "designIds": ["design_01J8Z9K2M3N4P5Q6R7S8T9V0W1"],
    "variants": [
        {
            "id": "4401",
            "designIds": ["design_01J8ZB0C1D2E3F4G5H6J7K8M9N"]
        }
    ]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.put(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    designIds: ['design_01J8Z9K2M3N4P5Q6R7S8T9V0W1'],
    variants: [{id: '4401', designIds: ['design_01J8ZB0C1D2E3F4G5H6J7K8M9N']}]
  })
};

fetch('https://api.print.app/v2/products/{productId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.print.app/v2/products/{productId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'designIds' => [
        'design_01J8Z9K2M3N4P5Q6R7S8T9V0W1'
    ],
    'variants' => [
        [
                'id' => '4401',
                'designIds' => [
                                'design_01J8ZB0C1D2E3F4G5H6J7K8M9N'
                ]
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api.print.app/v2/products/{productId}"

	payload := strings.NewReader("{\n  \"designIds\": [\n    \"design_01J8Z9K2M3N4P5Q6R7S8T9V0W1\"\n  ],\n  \"variants\": [\n    {\n      \"id\": \"4401\",\n      \"designIds\": [\n        \"design_01J8ZB0C1D2E3F4G5H6J7K8M9N\"\n      ]\n    }\n  ]\n}")

	req, _ := http.NewRequest("PUT", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.put("https://api.print.app/v2/products/{productId}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"designIds\": [\n    \"design_01J8Z9K2M3N4P5Q6R7S8T9V0W1\"\n  ],\n  \"variants\": [\n    {\n      \"id\": \"4401\",\n      \"designIds\": [\n        \"design_01J8ZB0C1D2E3F4G5H6J7K8M9N\"\n      ]\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.print.app/v2/products/{productId}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"designIds\": [\n    \"design_01J8Z9K2M3N4P5Q6R7S8T9V0W1\"\n  ],\n  \"variants\": [\n    {\n      \"id\": \"4401\",\n      \"designIds\": [\n        \"design_01J8ZB0C1D2E3F4G5H6J7K8M9N\"\n      ]\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "object": "product",
  "id": "8812001",
  "title": "Business cards",
  "designIds": [
    "design_01J8Z9K2M3N4P5Q6R7S8T9V0W1"
  ],
  "variants": [],
  "modified": "2026-10-27T10:00:00Z"
}

{
  "error": true,
  "code": "invalid_request",
  "message": "width is required.",
  "param": "width",
  "requestId": "FZn-uhymjoEEJow="
}

{
  "error": true,
  "code": "unauthorized",
  "message": "Missing or invalid secret key. Send it as \"Authorization: Bearer sk_…\".",
  "requestId": "FZn-uhymjoEEJow="
}

{
  "error": true,
  "code": "account_suspended",
  "message": "This account is suspended. Settle the outstanding invoice in the Print.App dashboard.",
  "requestId": "FZn-uhymjoEEJow="
}

{
  "error": true,
  "code": "not_found",
  "message": "Not found.",
  "requestId": "FZn-uhymjoEEJow="
}

{
  "error": true,
  "code": "unsupported_media_type",
  "message": "Send the request body as JSON, with \"Content-Type: application/json\".",
  "requestId": "FZn-uhymjoEEJow="
}

{
  "message": "Too Many Requests"
}

{
  "error": true,
  "code": "internal_error",
  "message": "Something went wrong on our side. Retry the request; if it keeps failing, contact support with the requestId.",
  "requestId": "FZn-uhymjoEEJow="
}