Whistl Integration Guide

Integrate your Whistl delivery and fulfilment services with Helm to automate order dispatch, track shipments, and synchronise inventory efficiently

What is Whistl

Whistl is a UK-based logistics provider specialising in parcel delivery, fulfilment, and returns management

Connecting Whistl with Helm enables automated order exports, real-time tracking updates, and seamless communication between your sales channels and logistics

PROS ✅

CONS ❌

UK-focused delivery network with flexible parcel options

Requires valid API credentials issued by Whistl

Automated tracking and returns integration

Some delivery options may have regional restrictions

Integration supports volume shipping and fulfilment centres

Advanced customisations may require Whistl support

Step-by-Step Setup

To connect Whistl with Helm:

  1. Obtain API Credentials
    Contact your Whistl account manager or access the seller portal to get:

    • API Key

    • API Secret

    • API Endpoint URL

  2. Log into Helm
    Navigate to Settings → My Store

  3. Add New Sales Channel
    Click Add New Sales Channel and select Whistl from the list

  4. Enter Required Details

FIELD

DESCRIPTION

Sales Channel Name

e.g., Whistl Fulfilment

Sales Channel Logo

Upload the Whistl logo or your company branding

API Key

Your Whistl API Key

API Secret

Your Whistl API Secret

API Endpoint URL

Base URL for API access (e.g. https://api.whistl.co.uk)

  1. Click Continue

Interaction Settings

Set preferences for inventory sync, stock capping, order importing and fulfilment logic

INTERACTION SETTINGS

DESCRIPTION

Sync Inventory

Import stock levels automatically from Whistl

Sync Orders

Export new orders from Helm to Whistl for fulfilment

Tracking Updates

Retrieve shipment tracking and status updates from Whistl

Auto Generate Labels

Enable automatic shipping label creation

Warehouse Selection

Map Helm warehouses to Whistl fulfilment locations

Final Steps

  • Click Save once all settings are configured

  • Set the channel to Is Active at the top of the screen

Your Whistl integration is now live - and you’re ready to Take the Helm

Common Issues

ISSUE

SOLUTION

API Credentials Invalid

Verify your API Key and Secret match those provided by Whistl

Orders Not Syncing

Ensure order sync settings are enabled and mapped correctly

Tracking Not Updating

Confirm tracking sync is active and API permissions are granted

Label Generation Failures

Check label settings and regional availability

For help with technical setup or credentials, contact Helm Support