All Plastiq Supported Payments by Card Brand
Plastiq recently filed for bankruptcy and was acquired by Priority Technology Holdings. They recently added a new delivery fee that will add a cost of up to $1.49 to your payments. This is on top of the 2.9% fee that Plastiq charges for all payments made by credit card.
Now that Amex cards are accepted once again, check out all the details about which credit card you can use for a specific Plastiq payment.
Plastiq Card Acceptance Guide
You can also see the image here.