Mycelium Gear isn't a third party payment processor, whether you are using their website to do it or rolling your own. That's due to the way their system works, you can read more on it at: https://gear.mycelium.com/. Source: about 2 years ago

There is of course also the technological angle ( e.g. Mycelium gear, which avoids being considered a TPSO by virtue of the technological design - https://gear.mycelium.com/ ). Source: over 2 years ago

Some of the results from my research. Сonfirmation required: - https://triple-a.io/ - Required Bank account to receive money - https://coingate.com/ - Required KYC - https://bitpay.com/ - Required business verification No confirmation required: - https://coinremitter.com/ - USDT available only for money - https://commerce.coinbase.com/ - Small list of available coins - https://www.blockonomics.co/ - Very... Source: over 2 years ago

GoURL is a 100% open-source cryptocurrency payment gateway that allows merchants to accept payments on their webstore. Source: about 3 years ago

Payment Gateway Software from gourl.io - Their site has a number of live samples and code examples on how to do commerce with their payment gateway software. Many currencies including feathercoin are supported. They have code in php and .net available (they even have a nuget package). Their site is at https://gourl.io/ and a 3rd party forum discussing them can be found at... Source: about 3 years ago