$ curl https://dash.stannp.com/api/v1/addresses/validate \
-u {API_KEY}: \
-d "company=Stannp" \ 
-d "address1=Unit 12" \ 
-d "address2=Taw trade park" \ 
-d "city=Barnstaple" \ 
-d "postcode=EX31 1JZ" \ 
-d "country=GB"

$curl = curl_init();

curl_setopt_array($curl, array(
    CURLOPT_URL => 'https://dash.stannp.com/api/v1/addresses/validate?api_key={API_KEY}',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => '',
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 0,
    CURLOPT_FOLLOWLOCATION => true,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => 'POST',
    CURLOPT_POSTFIELDS => array(
        'company' => "Stannp",
        'address1' => "Unit 12",
        'address2' => "Taw trade park",
        'city' => "Barnstaple",
        'postcode' => "EX31 1JZ",
        'country' => "GB"
    ),
));

$response = curl_exec($curl);

curl_close($curl);
print_r($response);

import requests

data = {
    'company': 'Stannp',
    'address1': 'Unit 12',
    'address2': 'Taw trade park',
    'city': 'Barnstaple',
    'postcode': 'EX31 1JZ',
    'country': 'GB'
}

response = requests.post('https://dash.stannp.com/api/v1/addresses/validate?api_key={API_KEY}', data=data)
print(response.text)

var client = new RestClient("https://dash.stannp.com/api/v1/addresses/validate?api_key={API_KEY}");

var request = new RestRequest(Method.POST);

request.AddParameter("company", "Stannp");
request.AddParameter("address1", "Unit 12");
request.AddParameter("address2", "Taw trade park");
request.AddParameter("city", "Barnstaple");
request.AddParameter("postcode", "EX31 1JZ");
request.AddParameter("country", "GB");

IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content)

{
   "success":true,
   "data":{
       "is_valid":true
    }
}