Today I am going to walk through the basic structure of Postmen rates API to calculate shipping rates. Note that we expect to make some changes in Q2 2016. You can refer to our previous post about Postmen labels API's request structure.

You can specify one or multiple shipper accounts to calculate shipping rates of your shipper accounts via Postmen RESTful JSON Rates API. If you do not specify shipper accounts, Postmen will use all your shipper accounts to calculate rates.

Postmen Rates API - Request structure:

Blue background colour = required fields

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Postmen Label API (dhl) - Request Payload:

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Read Postmen Rates API doc