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Whistl Developer Guide & API Credentials

Whistl API credentials for AfterShip Shipping: follow developer setup steps, collect required keys, connect the carrier, and generate shipping labels.

Overview

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

  1. Email Whistl sales representative and cc [email protected] Tell Whistl you need to obtain Whistl web service API credentials.

  2. Whistl will provide testing credentials for Sandbox environment: Client Code, Site Code and Customer Number

  3. 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.

  4. Whistl will provide the production credentials for Whistl web services API: Client Code, Site Code and Customer Number

Required Whistl API credentials

Credentials | Environment | Description |

customer_number | Sandbox / Production | Your Whistl customer account number. |

client_code | Sandbox / Production | Testing API credentials to access Whistl web service and Postmen API. |

site_code | Sandbox / Production | Testing API credentials to access Whistl web service and Postmen API. |

Whistl Developer Resources

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