Schedule a FedEx on-demand package pickup via the FedEx Pickup Request REST API

Steps

1. Obtain an OAuth 2.0 Bearer token from https://apis.fedex.com/oauth/token
2. Check availability first: POST to /pickup/v1/pickups/availabilities with pickup address, package readytime, and closeTime to confirm FedEx can service the location on the desired date
3. POST to /pickup/v1/pickups to create the pickup request; include pickupAddress, packageCount, totalWeight, pickupRequestType (ON_CALL or TAG), and the carrier code (FDXE or FDXG)
4. Store the confirmation number from the response; use it to cancel the pickup if needed via DELETE /pickup/v1/pickups/{confirmation_number}
5. FedEx has cutoff times for same-day pickup requests that vary by location; check the 'cutOffTime' field in the availability response before submitting