To offer a wide selection of carriers we do not integrate directly with carriers but with shipping platforms that do. This offers both a superior experience to customers and merchants in terms of reliability. Costs for shipping labels are billed directly to your account at one of these platforms.
The way our prepaid return labels work is the following:
You sign up for an account with one of our supported label-platforms: EasyPost, Shippo, ShipStation
See the available platforms and carriers over here: Supported Carriers
either connect your own carrier-contract to these platforms
or choose a carrier contract if one is available for the specific country
You then add the API key from one of these platforms to our dashboard
This way we can request a return label from your account on these platforms
If you have an existing shipping platform account or already signed up for one we support, follow our walkthrough at the end of this page.
you do not need to make any changes to your existing business or processes by using these shipping platforms and by creating an account with them
the account you have with them can be solely used for the return labels and nothing else
you do not need to install any additional apps on your store for this to work
for USPS we have an automatic logic to choose the cheaper rate for First/Priority-Mail. See USPS First-Class / Priority-Mail: choose cheapest rate based on weight
Mutiple return addresses: Custom return addresses
You can find your EasyPost API Key here after signing up: https://www.easypost.com/account/api-keys
You can find your Shippo API Key (also called Token) in your Shippo Dashbord / Settings / API
Live Tokens: work for all carriers
make sure that the account you want to use is NOT marked as "Test" or similar
Test Tokens: only work for some carriers. Use the Live Token for the setup if you encounter any issues like "rate not found"
You can find your ShipStation API Key (also called Token) in your ShipStation Dashbord / Settings / Account / API Settings