MTCaptcha.NetCore 0.5.0

.NET 6.0 This package targets .NET 6.0. The package is compatible with this framework or higher. 
dotnet add package MTCaptcha.NetCore --version 0.5.0
                    


                    

                
NuGet\Install-Package MTCaptcha.NetCore -Version 0.5.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="MTCaptcha.NetCore" Version="0.5.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="MTCaptcha.NetCore" Version="0.5.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="MTCaptcha.NetCore" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add MTCaptcha.NetCore --version 0.5.0
                    


                    

                
#r "nuget: MTCaptcha.NetCore, 0.5.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package MTCaptcha.NetCore@0.5.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=MTCaptcha.NetCore&version=0.5.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=MTCaptcha.NetCore&version=0.5.0
                    


                            Install as a Cake Tool

MTCaptcha .NET Core

The MTCaptcha .NET Core library provides a simple and secure way to integrate MTCaptcha into any .NET Core / ASP.NET Core application.

Features

  • .NET Core support
  • Server-side token validation
  • Simple DI registration
  • Works with MVC, Razor Pages, Minimal API

Installation

Install-Package MTCaptcha.NetCore

Or via .NET CLI:

dotnet add package MTCaptcha.NetCore

Configuration

Option 1: Using appsettings.json

appsettings.json:

{
  "MTCaptcha": {
    "PrivateKey": "YOUR_PRIVATE_KEY"
  }
}

Program.cs:

builder.Services.AddMTCaptcha(builder.Configuration.GetSection("MTCaptcha"));

Option 2: Using Action configuration

Program.cs:

builder.Services.AddMTCaptcha(options =>
{
    options.PrivateKey = "YOUR_PRIVATE_KEY";
});

Note: The verification URL is automatically configured and does not need to be specified.

Usage

MVC Controller Example

using MTCaptcha.NetCore.Interfaces;

public class CaptchaController : Controller
{
    private readonly IMTCaptchaService _captchaService;

    public CaptchaController(IMTCaptchaService captchaService)
    {
        _captchaService = captchaService;
    }

    [HttpPost]
    public async Task<IActionResult> Validate(string token)
    {
        var result = await _captchaService.VerifyCheckTokenAsync(token);
        
        if (result.Success)
        {
            return Ok(new { success = true });
        }
        
        return BadRequest(new { 
            success = false, 
            error = result.Error,
            failCodes = result.FailCodes,
            failCodeMessages = result.FailCodeMessages
        });
    }
}

Minimal API Example

app.MapPost("/validate-captcha", async (string token, IMTCaptchaService captchaService) =>
{
    var result = await captchaService.VerifyCheckTokenAsync(token);
    return result.Success 
        ? Results.Ok(new { success = true })
        : Results.BadRequest(new { success = false, error = result.Error });
});

Response Model

The VerifyCheckTokenAsync method returns a MTCaptchaCheckTokenResponse object:

public class MTCaptchaCheckTokenResponse
{
    public bool Success { get; set; }
    public string? Error { get; set; }
    public List<string>? FailCodes { get; set; }
    public Dictionary<string, string>? FailCodeMessages { get; set; }
}

License

MIT

Product Compatible and additional computed target framework versions.
.NET net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 is compatible.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
0.5.0 155 1/2/2026

Initial stable release with server-side MTCaptcha token verification.