Square Developer Forums - Forums for asking about Square APIs and SDKs

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	599	July 12, 2026
Welcome to Square Developer Forums Site Feedback	10	13234	September 7, 2026
Subscriptions API: seven-day pause accepted in Sandbox, billing date guarantees? Questions	0	2	September 7, 2026
Mobile Payments SDK Questions	2	17	September 6, 2026
Square Google Free Local Product Listings: repeated Merchant Center API errors Questions	0	1	September 6, 2026
UpdateBooking rejects appointment_segments on card-paid bookings since ~2026-07-17 (reservation_segments: "no order line item with uid …") Questions booking-api	9	88	September 5, 2026
Square recognizing .llc as an accepted domain extension Questions	0	4	September 5, 2026
How to join the Discord Developer chat? Questions	2	48	September 5, 2026
托管支付的页面语言，目前还是只能根据商户的国家来决定么？ Questions checkout-api	0	4	September 5, 2026
iOS In-App Payments SDK returns invalid_application_id with matching Production Application ID Questions in-app-payments-sdk	0	7	September 5, 2026
Orders API DELIVERY fulfillment returns 200 but isn't seller-accessible — need First-Party Delivery enabled Questions orders-api , beta	5	65	September 5, 2026
Square form fails to initialise - various Network issues Questions web-payments-sdk	15	45	September 4, 2026
INVALID_CARD_DATA problem Questions cards-api	9	4699	September 4, 2026
Questions about Square Appointments API and mobile service operations in Japan Questions	1	6	September 4, 2026
How many active access token can exist at the same time? Questions oauth-api	0	2	September 4, 2026
Created an App but no sandbox test account was created Questions	3	19	September 4, 2026
DeleteSubscriptionAction returns HTTP 500, and an unexpected charge occurred after deleting a SWAP_PLAN action Questions subscriptions-api	1	16	September 4, 2026
Sandbox dashboard broken - can't create Team Members or manage Shifts/Schedules Questions sandbox	2	16	September 4, 2026
Modifier lists deleted automatically minutes to hours after creation (9+ Occurences) Questions catalog-api	5	28	September 4, 2026
MCP Allowlist Request - Dualentry.com MCP	4	37	September 4, 2026
Square App Marketplace Integration Review Timeline Questions	6	53	September 4, 2026
Duplicate booking.updated events via webhook Questions webhooks-api , booking-api	7	46	September 4, 2026
MCP AllowList Request jhax.ai MCP	3	34	September 4, 2026
Set pick-up date/time in Register check-out Questions	2	623	September 3, 2026
Nested modifiers now available in the Catalog API Announcements catalog-api	1	21	September 3, 2026
AfterPay not working on production Questions	2	22	September 3, 2026
Need help locating the correct square api credentials/code for website integration Questions	1	10	September 3, 2026
How do I get an API refund to keep the item category and the tax? Questions refunds-api	0	4	September 3, 2026
Customers created via API with creation_source: THIRD_PARTY that I didn't create — no CreateCustomer calls in my app's API Logs Questions	4	20	September 3, 2026
Apple Pay (Web Payments SDK) — SDK aborts sheet at merchant validation; domain verified, credentials fresh, cards working Questions	4	48	September 3, 2026