curl --request PUT \
  --url https://{your-subdomain}.neetoinvoice.com/api/external/v1/clients/{client_id} \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <x-api-key>' \
  --data '
{
  "client": {
    "name": "Neeto Client Inc.",
    "secondary_name": "Subsidiary Alpha",
    "default_invoice_due_in_days": "30",
    "internal_notes": "Preferred billing cycle: monthly",
    "currency": "USD",
    "status": "active",
    "address_attributes": {
      "full_address": "123 Main St, Springfield, IL 62704, USA"
    }
  }
}
'

import requests

url = "https://{your-subdomain}.neetoinvoice.com/api/external/v1/clients/{client_id}"

payload = { "client": {
        "name": "Neeto Client Inc.",
        "secondary_name": "Subsidiary Alpha",
        "default_invoice_due_in_days": "30",
        "internal_notes": "Preferred billing cycle: monthly",
        "currency": "USD",
        "status": "active",
        "address_attributes": { "full_address": "123 Main St, Springfield, IL 62704, USA" }
    } }
headers = {
    "X-Api-Key": "<x-api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {'X-Api-Key': '<x-api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    client: {
      name: 'Neeto Client Inc.',
      secondary_name: 'Subsidiary Alpha',
      default_invoice_due_in_days: '30',
      internal_notes: 'Preferred billing cycle: monthly',
      currency: 'USD',
      status: 'active',
      address_attributes: {full_address: '123 Main St, Springfield, IL 62704, USA'}
    }
  })
};

fetch('https://{your-subdomain}.neetoinvoice.com/api/external/v1/clients/{client_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://{your-subdomain}.neetoinvoice.com/api/external/v1/clients/{client_id}",
  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([
    'client' => [
        'name' => 'Neeto Client Inc.',
        'secondary_name' => 'Subsidiary Alpha',
        'default_invoice_due_in_days' => '30',
        'internal_notes' => 'Preferred billing cycle: monthly',
        'currency' => 'USD',
        'status' => 'active',
        'address_attributes' => [
                'full_address' => '123 Main St, Springfield, IL 62704, USA'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-Api-Key: <x-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://{your-subdomain}.neetoinvoice.com/api/external/v1/clients/{client_id}"

	payload := strings.NewReader("{\n  \"client\": {\n    \"name\": \"Neeto Client Inc.\",\n    \"secondary_name\": \"Subsidiary Alpha\",\n    \"default_invoice_due_in_days\": \"30\",\n    \"internal_notes\": \"Preferred billing cycle: monthly\",\n    \"currency\": \"USD\",\n    \"status\": \"active\",\n    \"address_attributes\": {\n      \"full_address\": \"123 Main St, Springfield, IL 62704, USA\"\n    }\n  }\n}")

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

	req.Header.Add("X-Api-Key", "<x-api-key>")
	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://{your-subdomain}.neetoinvoice.com/api/external/v1/clients/{client_id}")
  .header("X-Api-Key", "<x-api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"client\": {\n    \"name\": \"Neeto Client Inc.\",\n    \"secondary_name\": \"Subsidiary Alpha\",\n    \"default_invoice_due_in_days\": \"30\",\n    \"internal_notes\": \"Preferred billing cycle: monthly\",\n    \"currency\": \"USD\",\n    \"status\": \"active\",\n    \"address_attributes\": {\n      \"full_address\": \"123 Main St, Springfield, IL 62704, USA\"\n    }\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{your-subdomain}.neetoinvoice.com/api/external/v1/clients/{client_id}")

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

request = Net::HTTP::Put.new(url)
request["X-Api-Key"] = '<x-api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"client\": {\n    \"name\": \"Neeto Client Inc.\",\n    \"secondary_name\": \"Subsidiary Alpha\",\n    \"default_invoice_due_in_days\": \"30\",\n    \"internal_notes\": \"Preferred billing cycle: monthly\",\n    \"currency\": \"USD\",\n    \"status\": \"active\",\n    \"address_attributes\": {\n      \"full_address\": \"123 Main St, Springfield, IL 62704, USA\"\n    }\n  }\n}"

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

{
  "notice_code": "<string>",
  "client_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}