Payment Gateway Implementation Guides
Listed below are implementation guides for each of the currently acceptable Payment Gateway connection methods, including Advanced Integration Method (AIM), Simple Integration Method (SIM), and WebLink.

Advanced Integration Method (AIM) Implementation Guide PDF
This document details the technical specifications and features of the AIM connection method. AIM uses a direct secure sockets layer (SSL) connection to the Payment Gateway and is Authorize.Net's recommended connection method.
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Simple Integration Method (SIM) Implementation Guide PDF
This document details the technical specifications and features of the SIM connection method. SIM uses a secure, encrypted HTTPS form POST connection to the Authorize.Net Payment Gateway. With SIM, each transaction is authenticated using a unique fingerprint (like a password).
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WebLink Implementation Guide PDF
This document details the technical specifications and features of the WebLink connection method. WebLink uses a secure, encrypted HTTPS form POST connection to the Authorize.Net Payment Gateway. NOTE: Please be aware that WebLink will be discontinued in early 2003, and should be considered a temporary Payment Gateway connection method solution.
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Shopping Cart Certification (SCC) AIM Implementation Guide
Designed specifically to meet the needs of shopping carts, this version of the AIM Implementation Guide details the specifications and features of the AIM connection method for shopping cart companies participating in the Authorize.Net SCC Program.
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Card Present (CP) Implementation Guide PDF
This document details the technical specifications and features of the card-present 1.0 integration to the payment gateway.
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