curl --request POST \
  --url https://api.hit-pay.com/v1/products/{product_id} \
  --header 'Content-Type: multipart/form-data' \
  --header 'X-BUSINESS-API-KEY: <x-business-api-key>' \
  --form 'name=<string>' \
  --form price=123 \
  --form 'description=<string>' \
  --form 'headline=<string>' \
  --form quantity=1 \
  --form quantity_alert_level=1 \
  --form currency=sgd \
  --form category_ids=9a12fab0-d282-4437-9460-c3d26662d11a \
  --form is_manageable=1 \
  --form is_pinned=0 \
  --form product_weight=123 \
  --form delivery_method_required=true \
  --form 'existing_variation={
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "price": 123,
  "quantity": 123,
  "quantity_alert_level": 123,
  "image": "<string>",
  "product_variation_weight": 123,
  "variation_value_1": "<string>",
  "variation_value_2": "<string>",
  "variation_value_3": "<string>"
}' \
  --form 'images={
  "image": "<string>"
}' \
  --form publish=1 \
  --form _method=PATCH \
  --form existing_variation.items.image='@example-file' \
  --form images.items.image='@example-file'

import requests

url = "https://api.hit-pay.com/v1/products/{product_id}"

files = {
    "existing_variation.items.image": ("example-file", open("example-file", "rb")),
    "images.items.image": ("example-file", open("example-file", "rb"))
}
payload = {
    "name": "<string>",
    "price": "123",
    "description": "<string>",
    "headline": "<string>",
    "quantity": "1",
    "quantity_alert_level": "1",
    "currency": "sgd",
    "category_ids": "9a12fab0-d282-4437-9460-c3d26662d11a",
    "is_manageable": "1",
    "is_pinned": "0",
    "product_weight": "123",
    "delivery_method_required": "true",
    "existing_variation": "{
  \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",
  \"price\": 123,
  \"quantity\": 123,
  \"quantity_alert_level\": 123,
  \"image\": \"<string>\",
  \"product_variation_weight\": 123,
  \"variation_value_1\": \"<string>\",
  \"variation_value_2\": \"<string>\",
  \"variation_value_3\": \"<string>\"
}",
    "images": "{
  \"image\": \"<string>\"
}",
    "publish": "1",
    "_method": "PATCH"
}
headers = {"X-BUSINESS-API-KEY": "<x-business-api-key>"}

response = requests.post(url, data=payload, files=files, headers=headers)

print(response.text)

const form = new FormData();
form.append('name', '<string>');
form.append('price', '123');
form.append('description', '<string>');
form.append('headline', '<string>');
form.append('quantity', '1');
form.append('quantity_alert_level', '1');
form.append('currency', 'sgd');
form.append('category_ids', '9a12fab0-d282-4437-9460-c3d26662d11a');
form.append('is_manageable', '1');
form.append('is_pinned', '0');
form.append('product_weight', '123');
form.append('delivery_method_required', 'true');
form.append('existing_variation', '{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "price": 123,
  "quantity": 123,
  "quantity_alert_level": 123,
  "image": "<string>",
  "product_variation_weight": 123,
  "variation_value_1": "<string>",
  "variation_value_2": "<string>",
  "variation_value_3": "<string>"
}');
form.append('images', '{
  "image": "<string>"
}');
form.append('publish', '1');
form.append('_method', 'PATCH');
form.append('existing_variation.items.image', '{
  "fileName": "example-file"
}');
form.append('images.items.image', '{
  "fileName": "example-file"
}');

const options = {method: 'POST', headers: {'X-BUSINESS-API-KEY': '<x-business-api-key>'}};

options.body = form;

fetch('https://api.hit-pay.com/v1/products/{product_id}', 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.hit-pay.com/v1/products/{product_id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"price\"\r\n\r\n123\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"description\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"headline\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"quantity\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"quantity_alert_level\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"currency\"\r\n\r\nsgd\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"category_ids\"\r\n\r\n9a12fab0-d282-4437-9460-c3d26662d11a\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"is_manageable\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"is_pinned\"\r\n\r\n0\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"product_weight\"\r\n\r\n123\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"delivery_method_required\"\r\n\r\ntrue\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"existing_variation\"\r\n\r\n{\r\n  \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\r\n  \"price\": 123,\r\n  \"quantity\": 123,\r\n  \"quantity_alert_level\": 123,\r\n  \"image\": \"<string>\",\r\n  \"product_variation_weight\": 123,\r\n  \"variation_value_1\": \"<string>\",\r\n  \"variation_value_2\": \"<string>\",\r\n  \"variation_value_3\": \"<string>\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"images\"\r\n\r\n{\r\n  \"image\": \"<string>\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"publish\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"_method\"\r\n\r\nPATCH\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"existing_variation.items.image\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"images.items.image\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Content-Type: multipart/form-data",
    "X-BUSINESS-API-KEY: <x-business-api-key>"
  ],
]);

$response = curl_exec($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.hit-pay.com/v1/products/{product_id}"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"price\"\r\n\r\n123\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"description\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"headline\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"quantity\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"quantity_alert_level\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"currency\"\r\n\r\nsgd\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"category_ids\"\r\n\r\n9a12fab0-d282-4437-9460-c3d26662d11a\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"is_manageable\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"is_pinned\"\r\n\r\n0\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"product_weight\"\r\n\r\n123\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"delivery_method_required\"\r\n\r\ntrue\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"existing_variation\"\r\n\r\n{\r\n  \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\r\n  \"price\": 123,\r\n  \"quantity\": 123,\r\n  \"quantity_alert_level\": 123,\r\n  \"image\": \"<string>\",\r\n  \"product_variation_weight\": 123,\r\n  \"variation_value_1\": \"<string>\",\r\n  \"variation_value_2\": \"<string>\",\r\n  \"variation_value_3\": \"<string>\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"images\"\r\n\r\n{\r\n  \"image\": \"<string>\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"publish\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"_method\"\r\n\r\nPATCH\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"existing_variation.items.image\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"images.items.image\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--")

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

	req.Header.Add("X-BUSINESS-API-KEY", "<x-business-api-key>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.hit-pay.com/v1/products/{product_id}")
  .header("X-BUSINESS-API-KEY", "<x-business-api-key>")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"price\"\r\n\r\n123\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"description\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"headline\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"quantity\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"quantity_alert_level\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"currency\"\r\n\r\nsgd\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"category_ids\"\r\n\r\n9a12fab0-d282-4437-9460-c3d26662d11a\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"is_manageable\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"is_pinned\"\r\n\r\n0\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"product_weight\"\r\n\r\n123\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"delivery_method_required\"\r\n\r\ntrue\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"existing_variation\"\r\n\r\n{\r\n  \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\r\n  \"price\": 123,\r\n  \"quantity\": 123,\r\n  \"quantity_alert_level\": 123,\r\n  \"image\": \"<string>\",\r\n  \"product_variation_weight\": 123,\r\n  \"variation_value_1\": \"<string>\",\r\n  \"variation_value_2\": \"<string>\",\r\n  \"variation_value_3\": \"<string>\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"images\"\r\n\r\n{\r\n  \"image\": \"<string>\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"publish\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"_method\"\r\n\r\nPATCH\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"existing_variation.items.image\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"images.items.image\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.hit-pay.com/v1/products/{product_id}")

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

request = Net::HTTP::Post.new(url)
request["X-BUSINESS-API-KEY"] = '<x-business-api-key>'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"price\"\r\n\r\n123\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"description\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"headline\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"quantity\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"quantity_alert_level\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"currency\"\r\n\r\nsgd\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"category_ids\"\r\n\r\n9a12fab0-d282-4437-9460-c3d26662d11a\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"is_manageable\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"is_pinned\"\r\n\r\n0\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"product_weight\"\r\n\r\n123\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"delivery_method_required\"\r\n\r\ntrue\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"existing_variation\"\r\n\r\n{\r\n  \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\r\n  \"price\": 123,\r\n  \"quantity\": 123,\r\n  \"quantity_alert_level\": 123,\r\n  \"image\": \"<string>\",\r\n  \"product_variation_weight\": 123,\r\n  \"variation_value_1\": \"<string>\",\r\n  \"variation_value_2\": \"<string>\",\r\n  \"variation_value_3\": \"<string>\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"images\"\r\n\r\n{\r\n  \"image\": \"<string>\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"publish\"\r\n\r\n1\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"_method\"\r\n\r\nPATCH\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"existing_variation.items.image\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"images.items.image\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--"

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

{
  "id": "9a12fab4-d112-48af-9d6b-050d650b0a25",
  "business_id": "9130c422-bf97-4bd1-b370-07a3a6f40708",
  "category_id": [
    "9a12fab0-d282-4437-9460-c3d26662d11a"
  ],
  "name": "Beanie",
  "headline": null,
  "description": "<p>Stylish hat suitable for the winter.</p>",
  "currency": "SGD",
  "price": 15,
  "price_display": "SGD 15.00",
  "price_stored": 1500,
  "tax_id": null,
  "is_manageable": 1,
  "is_pinned": false,
  "status": "published",
  "product_weight": 250,
  "delivery_method_required": true,
  "has_variations": true,
  "is_shopify": false,
  "product_url": "<string>",
  "variations_count": 2,
  "variations": [
    {
      "id": "9a12fab4-d998-44ea-ad11-8753be88a1c9",
      "stock_keeping_unit": null,
      "description": "Medium",
      "weight": null,
      "length": null,
      "width": null,
      "depth": null,
      "price": 18,
      "price_display": "SGD 18.00",
      "price_stored": 1800,
      "quantity": 150,
      "quantity_alert_level": 10,
      "product_variation_weight": 250,
      "variation_value_1": "Medium",
      "variation_value_2": null,
      "variation_value_3": null
    },
    {
      "id": "9a12fab4-dd20-4f8f-9e74-de28629f863a",
      "stock_keeping_unit": null,
      "description": "Large",
      "weight": null,
      "length": null,
      "width": null,
      "depth": null,
      "price": 20,
      "price_display": "SGD 20.00",
      "price_stored": 2000,
      "quantity": 148,
      "quantity_alert_level": 10,
      "product_variation_weight": 255,
      "variation_value_1": "Large",
      "variation_value_2": null,
      "variation_value_3": null
    }
  ],
  "variation_key_1": "Size",
  "variation_key_2": null,
  "variation_key_3": null,
  "images": [
    {
      "id": "9a12fab6-1e76-448e-8c45-e84e2e38f294",
      "caption": "Beanie",
      "url": "<string>",
      "other_dimensions": [
        {
          "size": "icon",
          "path": "<string>"
        },
        {
          "size": "large",
          "path": "<string>"
        },
        {
          "size": "small",
          "path": "<string>"
        },
        {
          "size": "medium",
          "path": "<string>"
        },
        {
          "size": "thumbnail",
          "path": "<string>"
        }
      ]
    }
  ],
  "is_published": true,
  "created_at": "2023-09-07T13:04:22+08:00",
  "updated_at": "2023-09-18T14:36:54+08:00",
  "starts_at": null,
  "ends_at": null
}

"{\"message\":\"The given data was invalid.\",\"errors\":{\"name\":[\"The name field is required.\"]}}"