curl --request POST \
  --url https://apidjonanko.tech/web-merchant \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "Beauty Shop",
  "reference": "beautyshop",
  "email": "contact@beautyshop.ci",
  "phoneNumber": "+2250700000000",
  "country": "CI"
}
'

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    name: 'Beauty Shop',
    reference: 'beautyshop',
    email: 'contact@beautyshop.ci',
    phoneNumber: '+2250700000000',
    country: 'CI'
  })
};

fetch('https://apidjonanko.tech/web-merchant', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://apidjonanko.tech/web-merchant"

payload = {
    "name": "Beauty Shop",
    "reference": "beautyshop",
    "email": "contact@beautyshop.ci",
    "phoneNumber": "+2250700000000",
    "country": "CI"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://apidjonanko.tech/web-merchant",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'name' => 'Beauty Shop',
    'reference' => 'beautyshop',
    'email' => 'contact@beautyshop.ci',
    'phoneNumber' => '+2250700000000',
    'country' => 'CI'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

{
  "name": "Beauty Shop"
}

{
  "statusCode": 401,
  "message": "Invalid API credentials",
  "error": "Unauthorized"
}