We get that data from the carriers directly at the moment.

OK. Thanks for the reply. So that might be a continually updated value, as opposed to an originally scheduled date? As a seller we have an interest in knowing when a package is delivered later than originally expected. I'm doing some programatic, carrier-specific things to monitor this internally, but would be interested in finding a way to this through something like Shippo's API. Basically, show me delivered and undelivered shipments that are beyond the originally scheduled/promised delivery date. Possible?

Yes, this should be continually updated (since it's (for the most part) pull from the same API that they have on their own tracking sites).

It won't ever say "this is later than expected" so you'd need to cache the originally scheduled date, but what you're doing should be possible.

We have a tracking analytics API for this at EasyPost that'll do the analysis - feel free to reach out to me for the details: my username at easypost.