The following tools can help you determine the source of processing errors, while providing helpful suggestions for correcting your integration to the Authorize.Net API.
The sandbox, https://test.authorize.net, is UP.
Response Reason Code
Use this interactive tool to look up errors and troubleshooting suggestions for hundreds of response reason codes (error code messages) issued by the payment gateway.
Response Reason Code Tool.
Sandbox Account Error Generation Guide
This guide allows developers to simulate various responses from the gateway, including approvals, declines, errors, as well as AVS and Card Code responses.
Sandbox Account Error Generation Guide.
Response Code 97
Validate whether the value you submitted to Authorize.Net for x_fp_timestamp is a valid timestamp for Simple Integration Method (SIM).
Response Code 97 Tool.
Response Code 99
Enter and validate your fingerprint input values against Authorize.Net application programming interface (API) formatting requirements. This tool helps you identify and correct transaction fingerprints for Simple Integration Method (SIM).
Response Code 99 Tool.
Automated Recurring Billing™ (ARB) Error Code
This tool allows you to look up information and troubleshooting suggestions for errors associated with creating, updating and canceling subscriptions using the ARB API.
Automated Recurring Billing™ Error Code Tool.
Customer Information Manager (CIM) Error Code
This tool allows you to look up information and troubleshooting suggestions for errors associated with creating, updating and deleting profiles using the CIM API.
Customer Information Manager Error Code Tool.
Data Validation URL
The Post Data Validation Tool can be used to validate the syntax of name/value pairs. The transaction results will be posted to the screen and will list all name/value pairs your script is submitting.
Data Validation URL Tool.