Compare E-Commerce APIs

Choose one of the integration methods below to connect a Web site to the payment gateway for processing transactions. Also view the Merchant Integration Guide, which focuses on the settings available in the Merchant Interface for configuring a Web site connection to the payment gateway.

	Simple Checkout	Server Integration Method (SIM)	Direct Post Method (DPM) New!	Advanced Integration Method (AIM)
Cost	Free	Free	Free	Free
Customer Experience	Pays on customizable Authorize.Net Web site	Pays on customizable Authorize.Net Web site	Pays on your Web site	Pays on your Web site
Level of Customization	Choose one of our Authorize.Net Simple Checkout "Buy Now" and "Donate" buttons or create your own button by customizing color and text. Single-item purchases in any quantity	Authorize.Net can handle all the steps in the secure transaction process—payment data collection, data submission and the response to the customer—while keeping Authorize.Net virtually transparent	You can control all steps in the payment process	You can control all steps in the payment process
Technical Expertise Required	Copy and paste HTML. No API required. Simply log into Merchant Interface to configure Buy Now or Donate buttons.	Scripting techniques to authenticate transactions with a unique transaction fingerprint	Basic programming skills	Advanced scripting knowledge recommended
Merchant SSL Certificate	No SSL required	No SSL required	SSL Recommended	SSL Required
User Sessions	N/A	N/A	N/A	Must use AIM to maintain user session throughout payment process
Data Storage	Data stored on Authorize.Net PCI-compliant servers (reduces risk to merchant)	Data stored on Authorize.Net PCI-compliant servers (reduces risk to merchant)	Data stored on Authorize.Net PCI-compliant servers (reduces risk to merchant)	Data stored locally on secure merchant server
API Resources	No API Required	View API Documentation	View API Documentation	View API Documentation

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