Sign up for an account on DHL: https://developer.dhl.com/user/register and fill in your account information
Once your profile is created, click on the "Apps" tab > "Create App"
Fill out the "Create app" form:
App name: whichever you want
Select APIs: Shipment Tracking - Unified
Click on the "Create app"
The App is now created! Click on the "Trackship" app.
Copy the Consumer key (not the Consumer secret!) and provide it to Trackship Carrier Account this will be the API key used to track your DHL packages.
Click on "Request upgrade", By default, the DHL API only allows for 250 requests per day. However, the DHL team usually answers quickly and positively to upgrade requests.