Look for modern WMS with API connectivity, clear SLA and chargeback terms, secure inventory controls, scalable racking and handling capacity, and the ability to support value-added services (kit, returns, labeling). Verify lead times to major carriers and emergency handling procedures.

Proximity to main arterial roads and short drayage to coastal ports reduces transit time and fuel costs, improving last-mile reliability. Evaluate a 3PL's carrier contracts, scheduled pickup frequencies, and multi-carrier routing options to optimize cost-to-serve and delivery windows.

Confirm bonded warehouse licensing, in-house customs clearance capability, expertise in required documentation, and established relationships with customs brokers. These reduce release times and demurrage risk for cross-border shipments.

Compare landed cost per SKU, pick-and-pack labor rates, storage density charges, order accuracy, on-time shipment rate, and average lead time. Request sample TCO scenarios for typical SKUs and expected order profiles to validate pricing under real demand patterns.