This developer guide shows how to access UPS API via Postmen, and UPS web services / XML services. See also the required API credentials / keys for UPS integration.

Get UPS Developer Credentials

Get your UPS shipper account number from UPS local sales team.
Input your account number and shipper address in Postmen, make sure the address is exactly the same as your address in the UPS system.
In the UPS Account Authentication section, input your recent invoice info in Postmen so that UPS can verify the account number and invoice info to grant Postmen permission printing label for your UPS account.

Required UPS API credentials

UPS Developer Resources

Read UPS Express API docs

Supported UPS Express service types

Postmen UPS technical support: support@postmen.com