Square Developer Forums

Topic	Replies	Views	Activity
Developer Support Consolidation Announcements Hi all - we wanted to provide an update. We’re consolidating developer support into a single channel. Starting May 1, our Developer Forums will be the central place for all questions and discussions and as part of this c…	1	882	July 12, 2026
Welcome to Square Developer Forums Site Feedback	10	13418	October 21, 2026
Unable to use reader with mobile sdk Questions mobile-payments-sdk	1	1	October 29, 2026
Japan: recurring card-on-file payments using our own scheduler — MIT/3DS and API requirements Questions subscriptions-api , webhooks-api , web-payments-sdk , cards-api	0	1	October 29, 2026
iOS production authorization_unsupported_country with US merchant/location and matching app ID Questions mobile-payments-sdk	0	1	October 29, 2026
Sandbox CreateOrder: unknown outcome and safe recovery without creating a new order Questions	1	3	October 29, 2026
MCP allowlist request — LUMEN / UNCHAINED MCP	0	1	October 29, 2026
UK marketplace app with seller payments, commission and monthly subscriptions Questions	0	4	October 29, 2026
Discount Codes API Special Access Request – Bayside Athletic Association Feature Requests	3	19	October 28, 2026
Updating RELATIVE subscription order-template pricing without changing an active subscription or billing date Questions	0	3	October 28, 2026
Sandbox: concurrent buyer-level CreateBooking accepts overlapping appointments Questions	2	10	October 28, 2026
MCP Allowlist Request - GBrain MCP	0	6	October 28, 2026
Using the Cash App ordering MCP server from a third-party app: terms, checkout and order status Questions orders-api , catalog-api , checkout-api , sandbox	1	11	October 28, 2026
Unable to test payment flow in sandbox for square-hosted checkout page Questions payments-api , sandbox	5	67	October 28, 2026
iOS In-App Payments SDK 1.6.7: encryption implementation for App Store compliance Questions	1	12	October 28, 2026
Does order_line_item changes, updates the updated_at value of parent order? Questions	1	12	October 28, 2026
Square Production Webhooks Returning 401 — Signature Mismatch Questions	6	35	October 28, 2026
Android Mobile Payments SDK: authorized but location is null; safe recovery with unknown offline queue Questions	0	2	October 28, 2026
Customers can access setting from unattended terminal Questions terminal-api	2	12	October 28, 2026
Weebly App Center - ConveyThis Version 1.0.1 Stuck in Review - Escalation Needed Questions	3	25	October 28, 2026
Requesting access to DELIVERY fulfillments in Square POS for third-party courier orders Uncategorized	0	4	October 28, 2026
Square Stand reader fails with SECURE_CONNECTION_TO_SQUARE_FAILURE (Mobile Payments SDK iOS 2.7.0, production) Questions mobile-payments-sdk	2	11	October 28, 2026
Securely fixing CSP errors in iFrame widget Questions	11	358	October 28, 2026
Checkout API — DeletePaymentLink race conditions and order cancellation behavior Questions checkout-api	1	17	October 28, 2026
Sandbox OAuth authorize page renders blank (empty #root) — app config verified correct Questions	5	124	October 28, 2026
Payments API policy and authorization requirements Questions payments-api , cards-api	3	26	October 28, 2026
Cash App Pay Sandbox – iPhone Safari Approval/Return Failure Questions payments-api	2	9	October 28, 2026
Prep Time from Orders API Questions orders-api	8	290	October 28, 2026
Sandbox STORE challenge TypeError and monthly cancellation date mismatch Questions	3	19	October 28, 2026
Square Appointments integration—booking modifiers and upfront payment matching Questions orders-api , payments-api , webhooks-api , sdk , booking-api , web-payments-sdk	2	16	October 28, 2026

Developer Support Consolidation

Hi all - we wanted to provide an update. We’re consolidating developer support into a single channel. Starting May 1, our Developer Forums will be the central place for all questions and discussions and as part of this c…