The Quote generation API provided requires the "postal code" parameter to be mandatory. However, in the panel provided by Easyship, we are able to obtain quotes even without entering pin codes.

Please clarify 2 things:

How to get quote even without sending pincodes / postal codes.
Now even after sending postal codes in api as parameter we are not able to get the exact same quotes as in easyship panel. Means if in easyship panel we get 5 companies quotation/price for a product shipping , then if we do thorugh api we only recieve 2 or 3 offers at max ( there must be some issues , we figured out that even after sending postal codes , the api is not accepting it and giving less offers ).

We would like to know the proper method to achieve this. Kindly assist