The Best C# Library for VIN (Vehicle Identification Number) OCR

// 💰 Save 30%+ vs competitors. Get 200 free requests instantly:
// 👉 https://structocr.com/register

using System;
using System.IO;
using System.Net.Http;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;

public class VinOcrExample
{
    public static async Task Main(string[] args)
    {
        string apiKey = "YOUR_API_KEY"; // Replace with your actual API key
        string imagePath = "path/to/your/image.jpg"; // Replace with the path to your VIN image

        try
        {
            // 1. Read the image file and convert it to Base64
            byte[] imageArray = await File.ReadAllBytesAsync(imagePath);
            string base64Image = Convert.ToBase64String(imageArray);

            // 2. Create the JSON payload
            var payload = new { img = base64Image };
            string jsonPayload = JsonSerializer.Serialize(payload);

            // 3. Configure the HTTP client
            using var httpClient = new HttpClient();
            httpClient.DefaultRequestHeaders.Add("x-api-key", apiKey);
            httpClient.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
            var content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");

            // 4. Send the POST request to the StructOCR API
            HttpResponseMessage response = await httpClient.PostAsync("https://api.structocr.com/v1/vin", content);

            // 5. Handle the response
            if (response.IsSuccessStatusCode)
            {
                string responseBody = await response.Content.ReadAsStringAsync();

                // Parse the JSON response
                using (JsonDocument document = JsonDocument.Parse(responseBody))
                {
                    JsonElement root = document.RootElement;

                    if (root.GetProperty("success").GetBoolean())
                    {
                        JsonElement data = root.GetProperty("data");
                        string vin = data.GetProperty("vin").GetString();
                        string confidence = data.GetProperty("confidence").GetString();
                        
                        Console.WriteLine($"VIN: {vin}");
                        Console.WriteLine($"Confidence: {confidence}");
                    }
                    else
                    {
                        Console.WriteLine($"Error: {root.GetProperty("error").GetString()}");
                    }
                }

            }
            else
            {
                Console.WriteLine($"Error: HTTP Status Code {response.StatusCode}");
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Exception: {ex.Message}");
        }
    }
}