UniversalLicensing SDKs

Software Licensing SDKs for Every Development Stack

LicenseSpring SDKs give developers a direct path to implementing license activation, entitlement enforcement, and usage tracking with no custom infrastructure required.

Whether you're shipping desktop software, embedded systems, mobile apps, or backend services, there's an SDK built for your environment. Pick your language, follow the documentation, and start protecting your software in minutes.

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Software Licensing SDKs for Every Development Stack

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Developer-first APIs & SDKs

SDK SUPPORT

Available SDKs

LicenseSpring provides native SDKs across nine languages and runtimes. Each SDK supports license activation, validation, feature-flag enforcement, floating licenses, and usage-based metering, integrated directly into your application logic.

SDK Directory

SDK	Best For	Supported Platforms	Link
C/C++ SDK	Native desktop & embedded software	Windows, macOS, Linux, Android	View C++ SDK
.NET / C# SDK	Microsoft ecosystem apps	Windows, Xamarin, .NET Standard	View .NET SDK
Java SDK	JVM-based applications	Desktop, server applications, cross platform	View Java SDK
Python SDK	Automation, backend services, AI/ML tools	Cross-platform	View Python SDK
Go SDK	Backend services and cloud infrastructure	Cross-platform	View Go SDK
Node.js SDK	JavaScript and TypeScript applications	Backend services, Electron apps	View Node.js SDK
Unity SDK	Unity-based applications and simulations	Desktop and mobile Unity environments, cross platform	View Unity SDK
Swift / Objective-C SDK	Apple ecosystem applications	macOS and iOS applications	View Swift SDK
Android SDK	Mobile applications	Android devices	View Android SDK

Build with licensespring sdks

What You Can Implement With LicenseSpring SDKs

LicenseSpring SDKs give you the building blocks for production-grade software licensing regardless of stack or deployment environment.

License activation and validation: Activate licenses on first launch and validate them at runtime, online or offline
Feature-flag enforcement: Gate features by license tier or entitlement at the SDK level
Floating license management: Control concurrent seat usage from a shared license pool
Consumption and usage metering: Track API calls, compute time, credits, or custom usage units
Offline and air-gapped operation: Support file-exchange (offline) and code-exchange (air-gapped) activation flows without persistent connectivity
Hardware-bound licensing: Anchor licenses to specific devices using hardware fingerprints, or self-provision YubiKey-based hardware licenses
Platform state sync: Keep license state synchronized with the LicenseSpring platform in real time

SDK Capabilities

Core SDK Capabilities

Every LicenseSpring SDK ships with a consistent set of foundational capabilities designed for real-world deployment conditions.

Hardware ID Generation

Each SDK includes multiple algorithms for computing a unique, persistent hardware identifier based on the environment where the software runs. The appropriate algorithm is selected for the deployment context, whether that's a physical workstation, a virtual machine, a containerized environment, or a mobile device, ensuring stable device binding without manual configuration.

Offline License Validation and Grace Periods

All SDKs support local license checks that run without a live server connection. You can configure grace periods that define how long the SDK will honor a cached license before requiring an online revalidation. This covers both intentional offline deployments and unplanned connectivity loss, so a temporary network outage never interrupts a paying user's session.

Cross-SDK Interoperability

Products built across multiple components or platforms can use more than one LicenseSpring SDK simultaneously. All SDKs share a common license file format and compute hardware identifiers using the same underlying logic, so a license issued to a device is recognized consistently across every part of your product, regardless of which SDK each component uses.

Licensing Models

Supported Licensing Models

LicenseSpring SDKs support every major commercial licensing model. Choose the model that fits your product and enforcement requirements.

Node-Locked Licensing

Bind a license to a specific device using hardware fingerprints. Ideal for desktop software, engineering tools, and commercial productivity applications.

Consumption-Based Licensing

Meter usage against defined limits, including API calls, compute time, processing workloads, or custom credit units. Supports modern SaaS and AI/ML billing models.

Floating Licensing

Issue a shared license pool and let users check out seats as needed. The right model for enterprise environments, concurrent-use software, and shared workstations, including containerized and virtualized deployments where hardware fingerprinting isn't applicable.

Offline and Air-Gapped Licensing

Two distinct activation paths for disconnected environments: offline activation uses a file-exchange flow; air-gapped activation uses a code-exchange flow for environments with no external data transfer. Built for secure facilities, industrial networks, and defense deployments. 

Built for Modern Architectures

Built for Modern Software Architectures

LicenseSpring SDKs are designed to integrate cleanly across every major deployment model with no forced architectural compromises.

Supported environments

Native desktop applications (Windows, macOS, Linux)

Embedded and industrial systems (ARM, RTOS via C++ SDK)

Android and mobile applications

macOS and Apple ecosystem apps

Backend services and cloud infrastructure

Electron and Node.js desktop apps

Unity games, simulations, and training platforms

For products with multiple components or mixed stacks, you can combine SDKs under a single LicenseSpring account and licensing configuration.

Explore Developer SDK Documentation

Choose the Right SDK

Which SDK Should You Use?

Development Environment	Commonly Used SDK
Native Desktop Applications	C++ SDK
Microsoft Ecosystem Applications	.NET / C# SDK
JVM Applications	Java SDK
Backend Services	Go, Python, or Node.js SDK
Mobile Applications	Android SDK
Apple Ecosystem	Swift / Objective-C SDK
Game and Simulation Platforms	Unity SDK

If your product spans multiple platforms, LicenseSpring supports multi-SDK deployments under a single licensing configuration.

Explore Developer SDK Documentation

Get Expert Help

Get Help From Our Developer Team

Not sure which SDK fits your architecture? Our team can help you select the right integration path and walk you through implementation.

Full SDK documentation and API reference

Step-by-step integration guides

Direct developer support

Contact Support

LATEST BLOGS

Licensing Resources For Developers And Executives

Glossary

Mastering Feature Flags: Your Ultimate Guide to Software Flexibility

May 11, 202610 minutes

Discover how feature flags improve software flexibility, control, and safer releases in this complete guide.

Other

LicenseSpring Alternatives

February 18, 20257 Minutes

Explore alternatives to LicenseSpring for software licensing in LicenseSpring's blog post. Discover other licensing solutions and their features.

Glossary

What is a Floating License?

February 12, 202510 minutes

Explore LicenseSpring's glossary entry on floating licenses. Learn about the concept and benefits of floating licenses in software licensing.

Start Licensing Your Software Today

LicenseSpring gives development teams the SDKs, platform infrastructure, and support needed to ship software with professional-grade licensing across every platform you target. Choose your SDK and start integrating today.