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ECHOnline is the payment gateway and merchant account service that lets you accept credit cards online. ECHO has offered ECHOnline since 1997, and is used by thousands of merchants across the U.S. ECHO services U.S. based businesses only.

The Gateway
The ECHOnline service is built around the same set of industry-standard, open interfaces that enable World-Wide Web communications. All transactions use the following well-defined and well-understood technologies:

HyperText Transfer Protocol (HTTP)
Secure Socket Layer (SSL) Encryption
Common Gateway Interface (CGI)

ECHOnline receives messages as if they came from a Web browser. ECHO provides the Web server and the ECHOnline ISP provides the Web client. The interface between the ISP and ECHOnline is the standard HTTP/1.0 (or HTTP/1.1) protocol using Secure Sockets Layer (SSL) encryption. ECHOnline recognizes and processes both GET and POST methods. Transactions are broken up into delimited fields. A transaction is transmitted either in the request header for the GET method, or following the request headers for the POST method.

Obtaining a Merchant Account
To signup for an ECHOnline merchant account, visit

For more information on ECHO's products and features, please visit

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