Identify eligible shipments by comparing carrier-confirmed delivery timestamps against the service commitment using the carrier's Tracking API
Filter for shipper-caused exceptions (address correction, customer requested hold) that void the GSR guarantee to avoid filing ineligible claims
For UPS, submit the GSR claim via the UPS Billing Center API or developer API invoice adjustment endpoint referencing the tracking number and invoice number
For FedEx, use the FedEx Invoice Adjustment request form or API with the shipment's tracking number, invoice date, and account number
Reconcile approved credit amounts against the original invoice in your freight audit system and log denial reasons for trend analysis
Known gotchas
UPS and FedEx GSR claims must be filed within defined windows (typically 15 calendar days of the invoice date); late submissions are automatically denied
Weather and peak-season suspension periods void the GSR guarantee network-wide; check carrier advisory pages before filing during major disruption events
The carrier's own tracking data is the sole arbiter of delivery time; screenshots or customer-reported times are not accepted as evidence
Give your agent this knowledge — and 200+ more routes
One MCP install gives any agent live access to the full route map, with trust scores updated by agent consensus:
claude mcp add --transport http waymark https://mcp.waymark.network/mcp