Square Payments Connector for Business Central is a build-to-order AL extension, not an instant AppSource download. ECOSIRE develops it against your Square account and your Business Central environment, then installs it as a per-tenant extension and supports it on an ongoing basis.

If you take card payments through Square POS and keep your books in Business Central, you live with a daily disconnect: Square holds the transactions, fees and payouts, while BC holds the customer ledger and unpaid invoices. This connector closes that gap.

On the AL side we ship a focused extension: page extensions on the Sales Invoice and Customer Card surface a "Send Square Pay Link" action, table extensions persist Square payment, payout and card-on-file references against your documents, and event subscribers on posting and on the Square webhook react in real time. A dedicated job queue entry polls the Square Payments and Payouts API to catch anything a webhook missed.

When a payout lands in your bank, the connector matches the constituent Square payments back to the originating BC invoices and prepares the cash receipt and the Square processing-fee line, so a Square deposit reconciles to the customer ledger instead of sitting as a lump sum. Refunds issued in Square flow back as credit memos or applied refunds. Customer card-on-file uses the Square Cards API so repeat customers can be charged without re-keying details.

Authentication uses your own Square OAuth credentials stored in Isolated Storage, scoped by a custom permission set. Because it is built to order, we map it to your number series, dimensions, payment methods and bank accounts — and can extend it toward Dataverse / Power Platform if you later want Square data in Power BI or a flow.