Licence keys for your software

Issue keys, lock each one to a single machine and keep checking it while your app runs Revoke a key and the program closes on that PC within a minute

Start free See the code
  • Free, every feature
  • SDKs or plain REST
  • AES-256 + HMAC on every call
  • One key, one machine
Works with
  • C#
  • VB.NET
  • Python
  • C++
  • Node.js
  • Java
  • Kotlin
  • Android
  • PHP
  • Dart

One key, from sale to shutdown

  1. Sold

    You create a key in the panel for 30 days, a year or for life, and send it to the customer

  2. First sign-in

    The customer types the key It locks to the hardware ID of that PC Any other PC is refused

  3. Running

    While the app is open it checks in every 30 seconds Every answer is encrypted and signed

  4. Revoked

    Refund, chargeback or a key posted in a group You revoke it in the panel

  5. Closed

    The next check-in is refused Your app gets the session-ended event and closes itself

One sign-in, five checks

What happens between the customer typing their key and your app opening If any check fails, the app stays closed

Your app Customer signs in

Types the key, the SDK adds the machine ID

PWF-8K3D-7HZE-XW4N
  1. 01

    Fresh, untouched request

    Pass

    If not Older than 5 minutes or changed on the way: rejected

  2. 02

    Real, unexpired key

    Pass

    If not Wrong guesses in a row lock the sender out

  3. 03

    Same PC as before

    Pass

    If not Refused A reset needs your OK

  4. 04

    Not shared around

    Pass

    If not You get an alert on Telegram and can revoke it

  5. 05

    A build you still allow

    Pass

    If not Told to update before it can go on

Your app Opens

Only after the SDK checks the signature A fake server gets nowhere

Signature verified

Then every 30 seconds

The app checks in Revoke the key and it closes within a minute

Three missed check-ins

If the server can't be reached three times in a row, the app closes

Trials and texts

One trial per PC, and the texts, links and versions your app shows come from the panel

Five lines, and what they do

The code on the left, what happens when your customer runs it on the right No SDK for your language? Call the REST API from anything that speaks HTTPS

dotnet add package PWFAuth NuGet · PWFAuth · 1.5.2 
var client = new PwfClient(AppSecret);
client.SessionEnded += (s, e) => Application.Exit();

PwfResponse login = await client.LoginAsync(licenseKey);
if (!login.Success) { ShowError(login.Message); return; }

client.StartHeartbeat();
Your App · DESKTOP-1NDS9CTExample run
  1. 14:02:11
    Signed in line 4

    Key PWF-8K3D-… is valid for 29 more days, now locked to this PC

  2. 14:02:41
    Check-in line 7

    Every 30 seconds while the app is open · 48 ms

  3. 14:03:11
    Check-in

    48 ms

  4. 14:03:41
    Session ended line 2

    You revoked the key in the panel The app closed itself

Also Node.js Java Kotlin Android PHP Dart Delphi All SDKs

Encrypted and signed by the SDK Full guide

One plan

$0 forever

Every feature, for every developer No card, no trial that runs out, and no feature kept for a paid plan

Create a free account Read the docs
  • Licence keys Hours to lifetime, locked to a PC
  • Live kill switch Ban a key, the app closes
  • Customer accounts Username and password sign-in
  • Resellers and stores SellAuth, Stripe, Shoppex
  • Updates Ship builds, make one required
  • Texts and slides No new build to change them
  • Telegram and Discord A bot for every app
  • SDKs and REST API C#, VB.NET, Python, Node.js, C++
  • Signed webhooks Your server hears every sale
Applications
No limit
Resellers
No limit
PCs per key
100
Update storage
2 GB
Keys per batch
50
Keys per import
5,000
Paying somewhere else? KeyAuth Keygen Cryptolens

Watch it work

Walkthroughs and tutorials from our YouTube channel, newest first

Sell your Python CLI tool with license keys (free template, real kill switch)
  1. Protect Your Android App With License Keys and a Kill Switch
  2. PWF Auth Team: Let People Help With Your App Without Sharing Your Password
  3. How PWF Auth Works: Free License Keys, HWID Lock & Live Kill Switch for Your Software
  4. Your Keys, Your Format: Custom License Key Formats for Apps and Resellers
All videos on YouTube

Questions

What is PWF Auth?

A licence server for software you sell You make keys in the panel, your app signs in with the key the customer typed, and the server keeps checking it while the app runs

Which languages are supported?

C# and VB.NET through the PWFAuth NuGet package (netstandard2.0, so .NET Framework 4.6.2+ and .NET 6+ both work), Python through the pwfauth package, and C++ with two source files that use WinHTTP and BCrypt from Windows Node.js through the pwfauth package on npm For Java, Kotlin, Android, PHP, Dart and Delphi, the SDK generator in your panel writes a ready client file for your app, and any other language can call the API directly

Can one key run on two computers?

Not unless you allow it A key locks to the first PC; you can let a key run on more PCs (up to 100) in the panel A customer who changes PC asks for a reset from inside your app and you approve it

What if my customer loses internet?

The app keeps running through three missed check-ins and then closes A short drop won't throw anyone out, and pulling the cable won't keep a revoked key alive

Can someone fake the server?

No Every reply is signed with PWF Auth's private key and the SDK checks it with the public key built into it, so a fake or changed answer is rejected before your app reads it

How much does it cost?

Nothing PWF Auth is free: licence keys, customer accounts, resellers, updates, texts and slides and the Telegram bot are all on the free account Create an account and add your first app in a few minutes

Your first app is a few minutes away Free

Create a free account Questions? Telegram or support@pwfauth.com