.NET

To make the HTTP request easier, we use Restsharp for the example. Be free to use whatever you want

Find all parameters via this link: https://docs.sendgrid.com/api-reference/mail-send/mail-send

var message = new
{
    layoutIdentifier = "<<YOUR_LAYOUT_ID>>",
    variables = new {},
    code = null,
    from = new
    {
        name = "Example User",
        email = "[e-mail]"
    },
    subject = "My first email",
    personalizations = new[]
    {
        new
        {
            to = new[]
            {
                new
                {
                    name = "Example User",
                    email = "[e-mail]"
                }
            }
        }
    }
};


RestClient client = new RestClient();
RestRequest request = new RestRequest("https://api.mailwind.io/v1/send/sendgrid/v3", Method.Post);
request.AddHeader("Authorization", $"Bearer <<YOUR_API_KEY_HERE>>");

request.AddJsonBody(msg, "application/json");

var response = client.Execute(request);