Rust license key system

License checking in a few lines

let client = LicenseClient::new(
    "https://license.foliox.sbs",
    "my-tool",
    PUBLIC_KEY, // from /api/v1/public-key
)?;

// activates on first run, verifies on every run after
let result = client.check(license_key);
if !result.valid {
    eprintln!("not licensed: {:?}", result.reason);
    std::process::exit(1);
}

Get started

1. Create a free account, add a product, and generate a key.
2. Get the Rust client and its full guide: Rust SDK docs.
3. Copy the public key from /api/v1/public-key into your app — the SDK uses it to verify every answer.
4. Call check() with the customer’s key as shown above.

Why this SDK

• Typed results with an explicit reason instead of stringly-typed errors.
• Suits CLI tools, games and desktop apps shipped as native binaries.
• Signatures are standard Ed25519, so any Rust crypto crate can verify them.

Prefer plain HTTP? See the licensing API and the API reference. Device locking works through a hashed machine ID — here’s how.