API Downloads

All API downloads include fully documented examples. Please refer to the installation guide.

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Developer Libraries
NuCaptcha for Java
The NuCaptcha Java Library easily integrates into your existing Java applications.
 
v1.0.17772
Download
NuCaptcha for .NET
The NuCaptcha .NET Library easily integrates into your existing .NET applications. Works with Visual Basic, C# or C++ applications built with the .NET framework.
 
v1.0.17053
Download
NuCaptcha for PHP
The NuCaptcha PHP Library easily integrates into your existing PHP applications.
 
v1.0.16623
Download