# PNLCS Docs > Install, run and extend PNLCS, the open-source hosting billing platform and client portal Documentation for PNLCS, a free, MIT-licensed, self-hosted hosting billing platform and client portal (an open-source WHMCS alternative). ## Installation - [Backups]() - [Docker]() - [Inside a hosting panel]() - [Installation]() - [On your own server]() - [Requirements]() - [Security checklist]() - [Updating]() ## Getting started - [First login]() - [Setup checklist]() - [Your first sale]() ## Concepts - [The billing lifecycle]() - [How PNLCS is organized]() - [Products, services, orders and invoices]() - [Servers and modules]() ## Guides - [Affiliates]() - [Client logins and permissions]() - [Configure email]() - [Connect a server]() - [Currencies and exchange rates]() - [Custom client fields]() - [Deploy on Plesk]() - [Fraud screening]() - [Invoices, credit and refunds]() - [Polish e-invoicing (KSeF)]() - [Languages and translations]() - [Legal pages and consent]() - [Live servers]() - [Migrate from WHMCS]() - [Modules]() - [Notification channels]() - [Official exchange rates]() - [Payment gateways]() - [Promotions, addons and bundles]() - [2\. Connect the server]() - [4\. Create the product]() - [5\. The customer's panel]() - [3\. Install operating systems]() - [1\. Prepare Proxmox]() - [Running VPS services]() - [Troubleshooting]() - [Quotes, projects and staff board]() - [Reports]() - [Sell Docker apps]() - [Sell domains]() - [Sell Panelica licenses]() - [Sell VPS on Proxmox VE]() - [Staff and roles]() - [Support mail piping]() - [Support desk]() - [Tax rules]() - [Themes and branding]() - [aaPanel]() - [cPanel/WHM]() - [Custom (manual)]() - [DirectAdmin]() - [HestiaCP]() - [Panelica]() - [Plesk]() - [Vultr]() ## API - [Affiliates]() - [All endpoints]() - [Clients]() - [API credentials]() - [Domains]() - [API overview]() - [Invoices and billing]() - [Orders]() - [Projects]() - [Quotes]() - [Services and products]() - [SSL certificates]() - [System]() - [Support tickets]() ## MCP server - [Setup]() - [Tools]() ## Developer - [Contributing]() - [Hooks]() - [Developer Guide]() - [Writing a module]() - [Releases and updates]() - [Themes]() - [Translations]() ## Help - [Common issues]() - [FAQ]() - [Artisan commands]() - [Client permissions]() - [Environment variables]() - [General settings]() - [Scheduled commands]() - [Staff permissions]() - [Theme tokens]() - [WHMCS to PNLCS]()