If you mean payments for when you are selling something on your site, then yea BitPay is one option(even though I hate paying through BitPay). An alternative is BTCPay[1], though I really don't know which is better. Proceed with caution as I really haven't tried implementing either on a website myself.
If you mean for donations, then you can simply add in a wallet address and a QR code somewhere on your site.
[1]
https://btcpayserver.org/Can we talk about a truly decentralized market as long as BitPay and other sites involved as a middleman? I think we should find another ways.