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The plugin/extension embeds a line item in the shopping cart at checkout labeled “Transaction Fee”. When a customer uses a payment method, like a credit card, that results in a processing fee, the plugin/extension references the first eight digits of the card number entered and the zip code of the billing address entered and with this information queries the SurchX dataset through an API call.

Armed with the percentage rate of the card, the extension calculates the processing fee for a customer’s order and places that amount under Transaction Fee in the cart.

Currently Surchx is supporting the following carts: