curl --request POST \
  --url https://{subdomain}.conveyour.com/api/contacts/unblock \
  --header 'Content-Type: application/json' \
  --header 'x-conveyour-token: <api-key>' \
  --data '
{
  "contact_id": "64a1b2c3d4e5f6a7b8c9d0e1"
}
'

const options = {
  method: 'POST',
  headers: {'x-conveyour-token': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({contact_id: '64a1b2c3d4e5f6a7b8c9d0e1'})
};

fetch('https://{subdomain}.conveyour.com/api/contacts/unblock', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

const options = {
  method: 'POST',
  headers: {'x-conveyour-token': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({contact_id: '64a1b2c3d4e5f6a7b8c9d0e1'})
};

fetch('https://{subdomain}.conveyour.com/api/contacts/unblock', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://{subdomain}.conveyour.com/api/contacts/unblock"

payload = { "contact_id": "64a1b2c3d4e5f6a7b8c9d0e1" }
headers = {
    "x-conveyour-token": "<api-key>",
    "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://{subdomain}.conveyour.com/api/contacts/unblock",
  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([
    'contact_id' => '64a1b2c3d4e5f6a7b8c9d0e1'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-conveyour-token: <api-key>"
  ],
]);

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

curl_close($curl);

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

{
  "status": "ok",
  "message": "Contact unblocked"
}

{
  "status": "failed",
  "message": "Lacking necessary permission add_contacts",
  "data": {
    "permission": "add_contacts"
  }
}