Skip to content
Keylight Keylight Keylight Docs

SDKs and platforms

Keylight ships first-party SDKs for Swift, Rust, and JavaScript/TypeScript today. They verify licenses identically — the same signed v3 lease and Ed25519 check, proven by a shared set of cross-SDK conformance vectors. The HTTP API is stable and public, so any other platform can integrate the same way.

Available today

Section titled “Available today”
Swift

macOS · iOS · iPadOS · Mac Catalyst. Single-import, @Published license state, offline-ready Ed25519 lease verification.

Stable
Install the Swift SDK →
Rust

CLIs, daemons, and desktop apps — including a first-party Tauri plugin. Synchronous and runtime-free (no async/Tokio), with the offline lease verifier built in.

Stable
Install the Rust SDK →
JavaScript / TypeScript

Browser, Node, Deno, Bun, and edge/Workers from one fully-typed package. Online activation plus offline Ed25519 verification — server-side validation, Electron apps, and web apps alike.

Stable
Install the JS SDK →
C++

Cross-platform desktop, Unreal Engine games, and JUCE audio plugins. Header-only, zero-dependency core with the offline Ed25519 lease verifier built in — plus native Unreal (FHttpModule) and audio-thread-safe JUCE adapters.

Stable
Install the C++ SDK →

More platforms — demand-driven

Section titled “More platforms — demand-driven”

We add a first-party SDK when a real builder needs one, not to fill out a grid. The most-requested next candidate:

C# / .NET

Windows apps (WPF, WinUI, MAUI) and Unity / Godot projects. On request

If your stack isn’t a first-party SDK yet, you’re not blocked: the REST API ships licensing on any platform today, and the conformance vectors mean a ~60-line verifier behaves exactly like the SDKs above.

Anything else: use the REST API

Section titled “Anything else: use the REST API”

The Keylight backend is a thin, well-documented HTTP service. If your platform isn’t in the list above, you can still ship licensing today by calling the API directly:

  • Every request to /{tenantId}/activate, /{tenantId}/validate, and /{tenantId}/deactivate is a plain JSON POST.
  • Authenticate with the X-Keylight-SDK-Key header (one per tenant, rotatable from the dashboard).
  • Successful responses include an Ed25519-signed lease you can verify locally with the tenant’s public key — no need for a network round-trip on every app launch.

The signature format and lease schema are documented in Offline leases, so a 60-line implementation is enough for most platforms.

Next

Section titled “Next”