USPS Labels from Webapp

[Ylan]

Hey everyone, 

I have a requirement to integrate with the USPS to purchase shipping labels (priority mail and express mail). So, I have seen a few gems that deal with shipping but don't have USPS support (shippinglogic) or have USPS support but just for rate calculation and tracking, not label creation (active_shipping). 

I did encounter a gem that is supposed to do what I need (awesome_usps) but it's source contains SystaxErrors when I try to require it and it doesn't have any tests.

I am looking for a gem that works either directly with the USPS or with another provider, like Endicia.

Anybody have a recommendation?

-- 

Ylan