KeyAuth is an open source authentication system with cloud-hosted solutions available as well.

Cryptolens Client API for Python

KeyAuth CPP Example

KeyAuth Python Example

KeyAuth C#/CS/CSHARP Example

KeyAuth C++ Library 1.3 API Endpoint

Client API to access the functionality of Cryptolens Software Licensing API

Client API to access the functionality of Cryptolens Web API

Client API to access the functionality of Cryptolens Web API

C# wrapper for Labs64 NetLicensing RESTful API

C++ Interface for Cryptolens Web API

Client API to access the functionality of Cryptolens Software Licensing API

Example for a linkvertise keysystem using KeyAuth's Seller API

Rust Interface for Cryptolens Web API

PluginPass - WordPress PRO Plugin/Theme Licensing

PHP Example For KeyAuth Authentication System

PHP wrapper for Labs64 NetLicensing RESTful API

Labs64 NetLicensing - Innovative License Management Solution

JavaScript wrapper for Labs64 NetLicensing RESTful API

Example code and help tools to securely protect .NET SDKs with focus on offline environments

Example of how to verify license keys in PHP

Labs64 NetLicensing / eCommerce gateway

Java wrapper for Labs64 NetLicensing RESTful API

Open-source licensing server for generating and validating software keys/licenses as well as distributing software updates.

Custom Customer Panel - Host your authentication dashboard

Labs64 NetLicensing / Demo Application

Labs64 NetLicensing / Zapier Integration

KeyAuth Rust Example

KeyAuth Go Example

Kotlin wrapper for Labs64 NetLicensing RESTful API