BTCPay Server is a free and open-source cryptocurrency payment processor which allows you to receive payments in Bitcoin and altcoins directly, with no fees, transaction cost or a middleman.

BTCPay Server is a non-custodial invoicing system which eliminates the involvement of a third-party. Payments with BTCPay for OpenCart extension go directly to your wallet, which increases the privacy and security. Your private keys are never uploaded to the server. There is no address re-use since each invoice generates a new address deriving from your xPub key.

You can run BTCPay as a self-hosted solution on your own server, or use a third-party host.

The self-hosted solution allows you not only to attach an unlimited number of stores and use the Lightning Network but also become the payment processor for others.

• Direct, peer-to-peer Bitcoin and altcoin payments
  
• No transaction fees (other than mining fees by cryptocurrency network itself)
  
• No processing fees
  
• No middleman
  
• No KYC
  
• User has complete control over private keys
  
• Enhanced privacy (no address re-use, no IP leaks to third parties)
  
• Enhanced security
  
• Self-hosted, or on 3rd party host
  
• SegWit, Taproot support
  
• Lightning Network support (LND, c-lightning and Eclair)
  
• Altcoin support
  

Installation instructions:
You can find detailed instructions on requirments on how to install this extension on our documentation page.