Shipping labels for multiple services in bulk.
Can track packages across over a hundred different shippers.
One API for shipping stuff: https://www.easypost.com/shipping-api
One API just for tracking stuff: https://www.easypost.com/tracking-api
Tracking API costs $0.01us per package.
Python client library: https://github.com/EasyPost/easypost-python
Tracking guide: https://www.easypost.com/tracking-guide