Costco Integration FAQs: EDI compliance, automated instead of anxious

The InfiPlex Costco integration connects your approved Costco vendor relationship to the InfiPlex Inventory & Order Management System over EDI. Purchase orders pull in automatically, shipments ship from your warehouse or 3PL, and the ASN and invoice documents Costco requires post back — while your inventory stays synced with every other channel you supply.

Yes — Costco works through approved vendor relationships established directly with Costco buyers and issues a Vendor ID before EDI onboarding begins. InfiPlex connects that EDI relationship once you've been approved and Costco has issued its onboarding requirements — InfiPlex doesn't manage the vendor approval process itself.

Our USA-based team configures the EDI connection with you during onboarding, mapping the specific documents (850 purchase orders, 856 ASNs, 810 invoices, 997 acknowledgments, and others) Costco requires. There's nothing to install on your end — we handle the EDI setup and coordinate testing.

Your OMS site is provisioned within 1–2 business days, and EDI trading-partner setups generally take longer than a standard marketplace connection because Costco's certification process through its EDI network is involved. Our team scopes the specific timeline once we see your onboarding packet.

Yes — if your vendor relationship covers both bulk warehouse purchase orders and Costco.com dropship fulfillment, InfiPlex connects both flows, each configured to its own document requirements, since they're typically contracted and onboarded as separate EDI connections.

InfiPlex pulls EDI 850 purchase orders from Costco approximately every 15 minutes — faster if needed — landing in the same queue as your other retailer and marketplace orders, ready to route to a warehouse or 3PL.

Yes — once an order ships, InfiPlex generates and transmits the EDI 856 Advance Ship Notice and 810 invoice back to Costco automatically, along with the 997 functional acknowledgment, keeping your account compliant without manual EDI work.

Bulk depot orders replenish Costco's warehouses in case-pack or pallet quantities on a wholesale schedule; Costco.com dropship orders are per-member online orders that ship individually, more like a marketplace order. Both run over EDI but follow different document timing and packaging rules, which InfiPlex configures separately as Costco requires.

Yes — the OMS routes Costco orders to a connected 3PL or WMS via the 3PL Connector, with the required EDI confirmations generated automatically once the 3PL ships.

That's the core of the product: Costco joins the same order queue as Sam's Club, Walmart, and 130+ other integrations, so your team works from one screen instead of Costco's SPS Commerce or Rithum-based EDI portal alone.

InfiPlex maintains one master inventory pool, and every sale on any channel — Costco, Sam's Club, a marketplace, or your own webstore — updates available quantities everywhere in real time, which is what prevents you from committing stock to a Costco PO you can't actually ship.

Yes — per-channel buffers hold back a safety quantity for Costco commitments, which matters given how strictly Costco enforces fill-rate and shipment-accuracy expectations.

Use the built-in Inventory Tool for direct edits, the Inventory Upload tool for spreadsheet-based changes, scheduled FTP feeds, or automated pulls from supplier systems. One update propagates to your Costco EDI feed and every other connected channel.

Yes — the OMS tracks stock across multiple warehouses and 3PLs and routes orders to the right source, which matters for club-retail vendors who often stock pallet-quantity goods separately from parcel-shipped inventory.

InfiPlex automates exactly what Costco's EDI compliance rules scrutinize — on-time document transmission, accurate ASNs matching what actually shipped, and inventory that reflects real availability — which is where manual EDI processes most often break down under volume.

No — Costco does not operate a self-serve third-party seller marketplace. Costco works exclusively through approved vendor relationships established with Costco buyers; products reach members through Costco's own purchasing and merchandising process, not an open seller signup.

Becoming a Costco vendor involves pitching your product directly to Costco buyers and being formally approved before you're issued a Vendor ID and invited into EDI onboarding — this is a business development process handled outside of InfiPlex. Once you have an approved vendor relationship and EDI requirements from Costco, InfiPlex connects that relationship to your OMS.

Costco mandates the ANSI ASC X12 EDI standard across its core documents, transmitted via secure protocols like AS2, SFTP, or HTTPS — legacy dial-up or standard FTP connections aren't accepted. InfiPlex's EDI setup is built around these requirements.

Yes — our team works through Costco's EDI testing and certification requirements with you during onboarding, mapping each document format before you go live, which is the step most first-time Costco suppliers find the most demanding.

Costco's EDI specifications and routing requirements are set by Costco and can change over time. Our team updates your EDI configuration when Costco issues new requirements, as part of ongoing InfiPlex support for EDI trading partners.

That's common — InfiPlex connects whichever EDI flow your vendor relationship actually covers, so a bulk-only vendor isn't set up with dropship documents that don't apply to their account.

Costco's warehouse EDI commonly runs through SPS Commerce, while Costco.com transactions have historically run through a separate network; our team configures your connection to match whichever network your specific Costco relationship requires.

Costco connects on every InfiPlex plan as a standard EDI trading-partner connection. Basic Starter is $49.99/month with up to 2,000 SKUs at $0.50 per order; Growth Starter is $499.99/month with 10,000 SKUs and 1,000 orders included ($0.10 per additional order); Growth Pro is $999.99/month with 100,000 SKUs and 10,000 orders included ($0.05 per additional order). Full details are on the Pricing page.

EDI connections may carry retailer-required VAN costs depending on your specific setup, though InfiPlex can often significantly reduce or eliminate those costs compared to a standalone EDI provider — savings that typically help cover your InfiPlex package.

Vendors managing several EDI trading partners — Costco, Sam's Club, and others — often fit well on Growth Starter or Growth Pro, both of which include ERP connections like NetSuite on Growth Pro for reconciling wholesale volume against your books.

Growth packages carry a 3-month minimum commitment and Partner packages a 12-month term; Basic Starter is month-to-month. Schedule a demo and we'll scope the right plan against your EDI trading-partner mix.