For merchants doing custom development, Authorize.Net offers multiple methods of direct Integration to the Gateway. These are for merchants NOT using a pre-integrated Shopping Cart or POS.

Here is a link to the Developer Playbook.

Here is a link to the Developer API Reference Guide.

Authorize.Net offers toll-free technical support at 877.447.3938 and supports more Shopping Carts and Point of Sale solutions than any other payment gateway.

Included:

NO Set Up Fees

NO Cancellation Fees

FREE Tech Support

FREE Virtual Terminal

FREE Online Reporting

FREE Fraud Prevention

FREE Recurring Billing

FREE Invoicing

FREE Tokenization CIM

FREE Developer APIs

FREE Cart Integration

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