C# example implementation

// These code snippets use an open-source library. http://unirest.io/net

Task<HttpResponse<MyClass>> response = Unirest.post("https://www.transactionale.com/api/v1/transaction")
  .header("X-Authorization", "YOUR_API_KEY")
  .header("Content-Type", "application/json")
  .header("Accept", "application/json")
  .body("{ \"email\" : \"your-customer-email@mailprovider.com\", \"country\":\"it\", \"first_name\":\"customer-name\", \"zip_code\":\"00001\" }")
  .asJson();

Some notes:

We use Unirest in our examples, but feel free to use any framework or library capable of making HTTP POST requests
Remember to customise the variables in the examples - the snippet will not work as-is
You have a personal API key in the Integrate section of your account. Copy that key and subsitute it in the snippet where YOUR_API_KEY is noted
The HTTP request’s content type must be application/json (the example should already take care of this)
The body of the HTTP request must contain a JSON-encoded object with your data (the example should already take care of this)