To answer your question in the subject field, you can start by looking at their "Supported Gateways" page:

• Coinbase Commerce
  ^{- Free.}
• CoinPayments
  ^{- 0.5% fee + not accessible to some users based on their location.}

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I'm not a coder/developer but I believe you can achieve what you're looking for with BTCPay.
^{- Read their "documentation".}