Official .NET SDK for server-side verification of Private Captcha solutions.

Please check the official documentation for the in-depth and up-to-date information.

• Install the package via the .NET CLI or the NuGet Package Manager Console.

  dotnet add package PrivateCaptcha

• To verify a CAPTCHA solution, instantiate PrivateCaptchaClient with your configuration and call VerifyAsync.

   var config = new PrivateCaptchaConfiguration
   {
       ApiKey = "YOUR_API_KEY"
   };
   var captchaClient = new PrivateCaptchaClient(config);
   
   var result = await captchaClient.VerifyAsync(new VerifyInput { Solution = captchaSolution });
   if (result.OK())
   {
       Console.WriteLine("Captcha verification succeeded!");
   }
   else
   {
       // Verification failed, you can check the reason.
       Console.WriteLine($"Verification failed: {result.GetErrorMessage()}");
   }

• To use ASP.NET Core Middleware, add app.UsePrivateCaptcha() to your request pipeline.

• .NET 6+
• No external dependencies (uses only standard library)

This project is licensed under the MIT License - see the LICENSE file for details.

For issues with this .NET/C# client, please open an issue on GitHub. For Private Captcha service questions, visit privatecaptcha.com.