Make keys for your Windows apps, Roblox stuff, Discord bots or anything that can call a web API. Keys can lock to one device (HWID), run out after a set time, and buyers reset their own device with a Discord bot. You sell the keys however you like.
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A key works on one device. /reset-hwid in your Discord moves it, with a cooldown you set.
1 day, 30 days, lifetime... the clock starts the first time the key is used.
Every answer is signed with your app's secret, so a fake server can't say "ok".
/auth-setup links your server: /redeem, /reset-hwid, /key-info for your buyers.
Free: 5 apps, 2,000 keys per app. By using it you agree to the terms.