A client once asked us, honestly: “Which WMS does your warehouse run?” I asked back: “Do you care about the brand — or whether you can check your own inventory at 2 a.m.?” That reframing is the whole article: for sellers using an outsourced warehouse, the WMS brand is irrelevant. What it opens to you is everything.
WMS vs ERP in thirty seconds
A WMS (Warehouse Management System) governs everything inside the warehouse walls: locations, stock, receiving, putaway, picking, packing, shipping. An ERP governs the company: orders, purchasing, finance, the inventory ledger. Crudely — the ERP knows what you sold; the WMS knows which bin the goods sit in and how many are left. They synchronize through integration; neither replaces the other.
If you operate your own warehouse, shop for systems. If you use a 3PL, the WMS is the warehouse’s asset and your homework is one line: confirm it is willing — and able — to open the data to you.
The three things a 3PL’s WMS owes you
- Real-time inventory: live updates or nightly batches? Visibility to lot, expiry and bin level? Sellable stock separated from frozen and quarantine? A number one day stale is one day of overselling in peak season
- Inbound and outbound records: receiving discrepancy reports (are shortages proactively flagged?), putaway confirmations, shipment proofs and tracking numbers pushed back. These records are your evidence chain for reconciliation, claims and platform disputes — “we received it” and a timestamped receiving record in a system are different things
- API integration: orders flowing down automatically from platforms or your ERP; tracking numbers flowing back up; inventory syncing to prevent oversells. Without integration, those are three people copy-pasting daily — and every slipped cell is a wrong shipment
What API integration looks like when you cannot read code
You never need to read the API documentation — you need to ask about it: which platforms have turnkey integrations (existing connectors mean no development); is the API documentation public for your engineer or systems vendor to review; are status updates pushed (webhooks) or polled; are there sync-frequency limits; can history export, and in what format.
Small sellers usually live happily on turnkey connectors; only large volumes or in-house systems justify true open-API work. Keep the order straight — confirm the paved road first, then discuss custom work.
The data-capability checklist for choosing a warehouse
After the rate card, walk this list:
- How often does inventory update? Can I self-serve, or must I email?
- How fast is putaway after receiving? How are discrepancies reported, and within what window?
- How fast do tracking numbers return? Do they write back to my platform automatically?
- Which platforms integrate out of the box? Can I see the API docs?
- Can I export my history if I ever leave?
The last question is the quiet test of the relationship — a warehouse confident in its service does not hold your data hostage.
Where SKYCARGO fits
SKYCARGO INC answers that checklist in writing before you commit — inventory visibility, document flows and integration paths for our warehouses, alongside the cross-docking lane where storage is not even needed. Ask with your platform list. (Personal shipments: Shiptw.)
Integration capabilities vary by operation. Reference only.
