How to integrate USPS DelivConfirmCertifyV4Request API to print label into our web application

Question

I am working in ASP.Net with C# and i am new to Integrate USPS. so any one please tell me how to integrate USPS in my web site. here i am using this sample. it always return error :

Authorization failure. DeliveryConfirmationV4 is not a valid API name for this protocol.

http://production.shippingapis.com/ShippingAPITest.dll?API=DeliveryConfirmationV4&XML=" + xml + "";

Answer 1

Their documentation shows that the API parameter should be set up like so:

?API=DeliveryConfirmationV4.0Request

Answer 2

The solution to your problem is the same on this stackoverflow question- How to remove 'SAMPLE DO NOT MAIL' from USPS shipping API image

And you can find the steps to get this done from my answer on that question or by directly following this link- https://stackoverflow.com/a/27936025/3748701

Answer 3

you should get authorization from USPS. same error i was facing i had contacted customer care then they enabled for me.

Answer 4

You are using the wrong URL. The URL is https://secure.shippingapis.com/ShippingAPI.dll

Also be careful with the API name - it's a bit confusing. The API DelivConfirmCertifyV4 (used in the question title) is a test API. The production API is DeliveryConfirmationV4.

Here's an example with some code that works that does this: USPS API - After creating labels retrieving Tracking Number C#