Articles on: Shipper Account

Whistl Developer Guide & API Credentials

This developer guide shows how to access Whistl shipping API via AfterShip Shipping, and Whistl web service. See also the list of required API credentials / keys for Whistl integration.

Get Whistl Developer Credentials

Email Whistl sales representative and cc Tell Whistl you need to obtain Whistl web service API credentials.
Whistl will provide testing credentials for Sandbox environment:   Client CodeSite Code and Customer Number
Use the Whistl testing credential to generate a label via AfterShip Shipping Sandbox environment. Send Whistl the sample label, together with request and response xml files.
Whistl will provide the production credentials for Whistl web services API:  Client CodeSite Code and Customer Number

Required Whistl API credentials

Whistl Developer Resources

Read Whistl docs
Supported Whistl service types and service options
AfterShip Shipping Whistl technical support:

Updated on: 04/12/2023

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