Square Inventory Integration

By Tibeau De Grauwe, FounderUpdated August 2026

  • 25 products free
  • No credit card
  • 10-min setup

What the Square connector does

StockFlow is built for warehouse operations—scanning, receiving, multi-location stock, and counts. Square is the register and payments layer many retailers already run. The StockFlow ↔ Square connector keeps those roles clear: ops and warehouse truth in StockFlow, checkout in Square.

Version 1 focuses on the inventory job retailers care about most: bring Square items into StockFlow, then keep on-hand quantities aligned in both directions without CSV exports.

  • OAuth connect to the seller’s Square account
  • Map a Square location to a StockFlow branch
  • Pull catalog (items and variations) into StockFlow products
  • Two-way inventory: Pull from Square, Push to Square, or Sync now

How to connect

In StockFlow, open Settings → Integrations → Square and authorize with your Square login. Pick the Square location and the StockFlow branch it should map to, then save.

Run Sync catalog to create or match products by SKU. Use Pull from Square to seed on-hand counts, then Push to Square after warehouse counts or receiving. Sync now pulls Square deltas first, then pushes StockFlow changes; if both sides changed the same SKU, StockFlow keeps its quantity and the conflict is logged.

What is not in v1

Order and sales import, customer sync, payments, creating items in Square from StockFlow, and real-time webhooks are not part of this release. Manual Sync now covers two-way counts until webhook-driven updates ship.

Connect Square from your dashboard

Authorize Square, map a location, sync catalog, and keep POS and warehouse counts aligned.

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What our customers say

“Super Kind! Quick replies from their support and very easy fixes, changed the dashboard a bit and customized it. Also gave me 450 items extra on the free plan just for me. Highly recommend and again great service!”

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Frequently asked questions

Does StockFlow replace Square Inventory?
No. Square remains your POS and payments system. StockFlow adds operational inventory—barcode receiving, counts, and warehouse workflows—and keeps mapped stock levels aligned with Square.
Which side wins if counts disagree?
After the initial pull seed, StockFlow is source of truth. Sync now still pulls Square changes first, but if both sides changed the same item since the last sync, StockFlow quantity is kept and the conflict is recorded in sync history.
Do I need Square App Marketplace access to use this?
End users only need a Square seller account. StockFlow holds the OAuth application credentials server-side. Marketplace listing is how other Square sellers discover StockFlow; it is not required to connect your own account.