# Latest **URL:** https://developer.squareup.com/forums/latest.md [Latest](https://developer.squareup.com/forums/latest.md) · [Categories](https://developer.squareup.com/forums/categories.md) · [Tags](https://developer.squareup.com/forums/tags.md) --- ## [Developer Support Consolidation](https://developer.squareup.com/forums/t/developer-support-consolidation/25807)
**Author:** [@josh-square](https://developer.squareup.com/forums/u/josh-square)\ **Replies:** 1\ **Last updated:** [July 12, 2026, 10:21am UTC](https://developer.squareup.com/forums/t/developer-support-consolidation/25807 "2026-07-12T10:21:19Z")
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… --- ## [Welcome to Square Developer Forums](https://developer.squareup.com/forums/t/welcome-to-square-developer-forums/7)
**Author:** [@system](https://developer.squareup.com/forums/u/system)\ **Replies:** 10\ **Last updated:** [October 21, 2026, 2:18pm UTC](https://developer.squareup.com/forums/t/welcome-to-square-developer-forums/7 "2026-10-21T14:18:14Z")
Welcome to the Square Developer Forum! We wanted to create a space for our community to share what they know and learn from others as they build on top of the Square Developer platform. While we’re not trying to fence an… --- ## [Japan Sandbox: Bookings API rejects writes with “Merchant subscription does not support write operations”](https://developer.squareup.com/forums/t/japan-sandbox-bookings-api-rejects-writes-with-merchant-subscription-does-not-support-write-operations/28298)
**Author:** [@tomu](https://developer.squareup.com/forums/u/tomu)\ **Replies:** 1\ **Last updated:** [October 22, 2026, 8:15pm UTC](https://developer.squareup.com/forums/t/japan-sandbox-bookings-api-rejects-writes-with-merchant-subscription-does-not-support-write-operations/28298 "2026-10-22T20:15:52Z")
Hello Square Developer Support, I’m testing an integration between an existing flower shop website’s pickup reservation form and Square Appointments in Japan. The goal is to create a booking in Square from the form sub… --- ## [Supported API for Square Online temporary fulfillment closures and reopening?](https://developer.squareup.com/forums/t/supported-api-for-square-online-temporary-fulfillment-closures-and-reopening/28306)
**Author:** [@dmwall2006](https://developer.squareup.com/forums/u/dmwall2006)\ **Replies:** 1\ **Last updated:** [October 22, 2026, 8:01pm UTC](https://developer.squareup.com/forums/t/supported-api-for-square-online-temporary-fulfillment-closures-and-reopening/28306 "2026-10-22T20:01:27Z")
We are building an internal manager tool for an existing Square merchant, while retaining Square POS, Square Online, and existing marketplace integrations. As of October 2026, is there a supported API or approved integr… --- ## [Question about idempotency\_key on payments](https://developer.squareup.com/forums/t/question-about-idempotency-key-on-payments/28309)
**Author:** [@CristianoAlvarenga](https://developer.squareup.com/forums/u/CristianoAlvarenga)\ **Replies:** 0\ **Last updated:** [October 22, 2026, 7:28pm UTC](https://developer.squareup.com/forums/t/question-about-idempotency-key-on-payments/28309 "2026-10-22T19:28:10Z")
What is the retention/expiration window for an idempotency\_key on the Payments API (POST /v2/payments / CreatePayment)? After how long does resending a request with a previously-used idempotency\_key stop returning the or… --- ## [Square SDK Payment Requests Fail Intermittently When Reusing the Same Payment Workflow in My Mobile Application](https://developer.squareup.com/forums/t/square-sdk-payment-requests-fail-intermittently-when-reusing-the-same-payment-workflow-in-my-mobile-application/28224)
**Author:** [@glenphillips](https://developer.squareup.com/forums/u/glenphillips)\ **Replies:** 3\ **Last updated:** [October 22, 2026, 6:57pm UTC](https://developer.squareup.com/forums/t/square-sdk-payment-requests-fail-intermittently-when-reusing-the-same-payment-workflow-in-my-mobile-application/28224 "2026-10-22T18:57:02Z")
Hi All, I am developing a mobile application that uses the Square SDK to support in-person payments, and I am experiencing an intermittent problem when the application attempts to process payments through the same check… --- ## [Channel name not updating after renaming app](https://developer.squareup.com/forums/t/channel-name-not-updating-after-renaming-app/28299)
**Author:** [@BKSVL](https://developer.squareup.com/forums/u/BKSVL)\ **Replies:** 1\ **Last updated:** [October 22, 2026, 6:52pm UTC](https://developer.squareup.com/forums/t/channel-name-not-updating-after-renaming-app/28299 "2026-10-22T18:52:57Z")
My production app (Application ID sq0idp-SkuPr-PldaDyv2nuX\_G9dA) was renamed from “Nested Modifier Test” to “Grill Ordering Online” over a week ago, but new payments in the Seller Dashboard still show “Channel: Nested Mo… --- ## [Discount Codes API access request: Hey Man Studio / UMe Turbo](https://developer.squareup.com/forums/t/discount-codes-api-access-request-hey-man-studio-ume-turbo/28308)
**Author:** [@HeyManStudio](https://developer.squareup.com/forums/u/HeyManStudio)\ **Replies:** 0\ **Last updated:** [October 22, 2026, 6:50pm UTC](https://developer.squareup.com/forums/t/discount-codes-api-access-request-hey-man-studio-ume-turbo/28308 "2026-10-22T18:50:37Z")
Hi Square team, I’m Zane St. John of Hey Man Studio, developing UMe Turbo, an in-store racing game for UMe Tea. The planned game backend would award weekly winners points and unique coupons redeemable at UMe Tea’s exist… --- ## [CreateCard INVALID\_CARD\_DATA after successful Web Payments SDK tokenization — request for private trace review](https://developer.squareup.com/forums/t/createcard-invalid-card-data-after-successful-web-payments-sdk-tokenization-request-for-private-trace-review/28292)
**Author:** [@PKLCTY](https://developer.squareup.com/forums/u/PKLCTY)\ **Replies:** 1\ **Last updated:** [October 22, 2026, 6:40pm UTC](https://developer.squareup.com/forums/t/createcard-invalid-card-data-after-successful-web-payments-sdk-tokenization-request-for-private-trace-review/28292 "2026-10-22T18:40:18Z")
We need help identifying the cause of a production card-on-file verification failure. A customer successfully generated a card token through the Web Payments SDK, but POST /v2/cards returned HTTP 400: category: INVALID\_… --- ## [Stand MFi Approval Form — no response after 5+ weeks](https://developer.squareup.com/forums/t/stand-mfi-approval-form-no-response-after-5-weeks/27981)
**Author:** [@Nbarrie](https://developer.squareup.com/forums/u/Nbarrie)\ **Replies:** 24\ **Last updated:** [October 22, 2026, 6:35pm UTC](https://developer.squareup.com/forums/t/stand-mfi-approval-form-no-response-after-5-weeks/27981 "2026-10-22T18:35:38Z")
Hi all, I submitted the Square Mobile Payments SDK – Stand MFi Approval Form on 14 August 2026 for my app and still haven’t had any confirmation or update. App name: BlydePOS Bundle identifier: com.blyde.BlydePOS App… --- ## [Single-token OAuth revocation: refresh-token effects and reconnect behavior](https://developer.squareup.com/forums/t/single-token-oauth-revocation-refresh-token-effects-and-reconnect-behavior/28305)
**Author:** [@cdp923](https://developer.squareup.com/forums/u/cdp923)\ **Replies:** 0\ **Last updated:** [October 22, 2026, 6:20pm UTC](https://developer.squareup.com/forums/t/single-token-oauth-revocation-refresh-token-effects-and-reconnect-behavior/28305 "2026-10-22T18:20:36Z")
Hi Square team, We use the OAuth authorization-code flow, not PKCE, and are reviewing our seller disconnect behavior. We’ve read the single-token revocation guide and the recent forum discussion: We understand that r… --- ## [Customer-saved purchase data after a seller revokes access, and AI use](https://developer.squareup.com/forums/t/customer-saved-purchase-data-after-a-seller-revokes-access-and-ai-use/28281)
**Author:** [@receipthouse](https://developer.squareup.com/forums/u/receipthouse)\ **Replies:** 1\ **Last updated:** [October 22, 2026, 5:38pm UTC](https://developer.squareup.com/forums/t/customer-saved-purchase-data-after-a-seller-revokes-access-and-ai-use/28281 "2026-10-22T17:38:23Z")
I’m building ReceiptHouse, a read-only integration where a Square seller authorizes access, and their customers separately opt in to save their own purchases to a personal ReceiptHouse account (for receipts, warranties, … --- ## [Access to First Party Delivery, Delivery fulfilment beta for Honeybrie NL](https://developer.squareup.com/forums/t/access-to-first-party-delivery-delivery-fulfilment-beta-for-honeybrie-nl/28291)
**Author:** [@honeybrienl](https://developer.squareup.com/forums/u/honeybrienl)\ **Replies:** 2\ **Last updated:** [October 22, 2026, 5:38pm UTC](https://developer.squareup.com/forums/t/access-to-first-party-delivery-delivery-fulfilment-beta-for-honeybrie-nl/28291 "2026-10-22T17:38:21Z")
Hi Square Developer Support, I run Honeybrie NL and have a custom website checkout integrated with the Square Orders API. I need paid website orders to appear in my Square Dashboard Order Manager as active orders, with… --- ## [How long are idempotency keys retained for the CreatePayment endpoint?](https://developer.squareup.com/forums/t/how-long-are-idempotency-keys-retained-for-the-createpayment-endpoint/28303)
**Author:** [@akpwil21okloe](https://developer.squareup.com/forums/u/akpwil21okloe)\ **Replies:** 0\ **Last updated:** [October 22, 2026, 4:57pm UTC](https://developer.squareup.com/forums/t/how-long-are-idempotency-keys-retained-for-the-createpayment-endpoint/28303 "2026-10-22T16:57:21Z")
Hello, I’m planning to charge a saved card on file using the Payments API (CreatePayment), and I want to make sure a customer is never charged twice when we retry after a network timeout. The Idempotency documentation … --- ## [Missing Order Ready / Prepared status updates from Square after orders are completed](https://developer.squareup.com/forums/t/missing-order-ready-prepared-status-updates-from-square-after-orders-are-completed/28285)
**Author:** [@mariammansour04](https://developer.squareup.com/forums/u/mariammansour04)\ **Replies:** 3\ **Last updated:** [October 22, 2026, 4:47pm UTC](https://developer.squareup.com/forums/t/missing-order-ready-prepared-status-updates-from-square-after-orders-are-completed/28285 "2026-10-22T16:47:19Z")
Hi Square Developer Community, We are investigating an order-status synchronization issue with our Square integration (Grubtech) and would appreciate some guidance. Orders are being created and sent successfully to Squ… --- ## [Request Discount Codes API access — ILL Eagle Fireworks](https://developer.squareup.com/forums/t/request-discount-codes-api-access-ill-eagle-fireworks/28301)
**Author:** [@charlesm](https://developer.squareup.com/forums/u/charlesm)\ **Replies:** 0\ **Last updated:** [October 22, 2026, 3:16pm UTC](https://developer.squareup.com/forums/t/request-discount-codes-api-access-ill-eagle-fireworks/28301 "2026-10-22T15:16:45Z")
Please enable Discount Codes API access, including DISCOUNT\_CODES\_READ and DISCOUNT\_CODES\_WRITE, for ILL Eagle Fireworks. We need unique, single-use festival prize coupons redeemable on Square Register, expiring Decembe… --- ## [Supported pre-order additions to an existing UK Square restaurant bill](https://developer.squareup.com/forums/t/supported-pre-order-additions-to-an-existing-uk-square-restaurant-bill/28295)
**Author:** [@soubs](https://developer.squareup.com/forums/u/soubs)\ **Replies:** 0\ **Last updated:** [October 22, 2026, 11:56am UTC](https://developer.squareup.com/forums/t/supported-pre-order-additions-to-an-existing-uk-square-restaurant-bill/28295 "2026-10-22T11:56:45Z")
Hi Square team, Retriever manages bookings and food pre-orders for The Old Dog in the UK. We can already read the venue’s OPEN Square POS orders. Please confirm whether there is a supported way for our integration to ad… --- ## [Urgent: Multiple GENERIC\_DECLINE Errors – BerdSend Production Payments API](https://developer.squareup.com/forums/t/urgent-multiple-generic-decline-errors-berdsend-production-payments-api/28293)
**Author:** [@jeanaberd1](https://developer.squareup.com/forums/u/jeanaberd1)\ **Replies:** 1\ **Last updated:** [October 22, 2026, 3:17am UTC](https://developer.squareup.com/forums/t/urgent-multiple-generic-decline-errors-berdsend-production-payments-api/28293 "2026-10-22T03:17:13Z")
Title: Urgent: Multiple GENERIC\_DECLINE errors on BerdSend Production Payments API Hello Square Developer Support, We operate BerdSend LLC, an international mobile recharge platform based in the United States. We are … --- ## [MCP Allowlist Request - ContextPlus](https://developer.squareup.com/forums/t/mcp-allowlist-request-contextplus/28288)
**Author:** [@Gian](https://developer.squareup.com/forums/u/Gian)\ **Replies:** 1\ **Last updated:** [October 22, 2026, 1:39am UTC](https://developer.squareup.com/forums/t/mcp-allowlist-request-contextplus/28288 "2026-10-22T01:39:09Z")
Hi there! Gian here. ContextPlus is an Agent building platform and we’re expanding our suite of MCP connections to include Square as some of our customers are very enthusiastic about the Square set of services and featu… --- ## [Questions about a custom availability calendar, overlapping bookings, and external reservation integration in Japan](https://developer.squareup.com/forums/t/questions-about-a-custom-availability-calendar-overlapping-bookings-and-external-reservation-integration-in-japan/28217)
**Author:** [@imasuke](https://developer.squareup.com/forums/u/imasuke)\ **Replies:** 3\ **Last updated:** [October 22, 2026, 1:04am UTC](https://developer.squareup.com/forums/t/questions-about-a-custom-availability-calendar-overlapping-bookings-and-external-reservation-integration-in-japan/28217 "2026-10-22T01:04:49Z")
Hello Square Developer Support, I run Centre hairsalon in Japan. Square Japan Support referred me here. We would like to keep Square as our main appointment system and clarify whether these three workflows are official… --- ## [Revoke diagnostic app OAuth access without affecting my ERP](https://developer.squareup.com/forums/t/revoke-diagnostic-app-oauth-access-without-affecting-my-erp/28270)
**Author:** [@jfeich](https://developer.squareup.com/forums/u/jfeich)\ **Replies:** 1\ **Last updated:** [October 22, 2026, 12:47am UTC](https://developer.squareup.com/forums/t/revoke-diagnostic-app-oauth-access-without-affecting-my-erp/28270 "2026-10-22T00:47:26Z")
Hello Square team, I need to revoke the OAuth authorization for a diagnostic application I created, without affecting my separate ERP application. The Dashboard refuses disconnection because this is a custom app create… --- ## [CARD\_DECLINED\_VERIFICATION\_REQUIRED on UK Web Payments SDK payments, no 3DS challenge shown](https://developer.squareup.com/forums/t/card-declined-verification-required-on-uk-web-payments-sdk-payments-no-3ds-challenge-shown/28212)
**Author:** [@jrjr99](https://developer.squareup.com/forums/u/jrjr99)\ **Replies:** 3\ **Last updated:** [October 22, 2026, 12:33am UTC](https://developer.squareup.com/forums/t/card-declined-verification-required-on-uk-web-payments-sdk-payments-no-3ds-challenge-shown/28212 "2026-10-22T00:33:06Z")
UK merchant, production. Some buyers get CARD\_DECLINED\_VERIFICATION\_REQUIRED without ever seeing a 3DS challenge or a prompt from their banking app. I’d like to know whether 3DS was attempted on the payments below, and w… --- ## [Sandbox subscription billing-period dates and unknown creation outcome](https://developer.squareup.com/forums/t/sandbox-subscription-billing-period-dates-and-unknown-creation-outcome/28267)
**Author:** [@gotqrcodes](https://developer.squareup.com/forums/u/gotqrcodes)\ **Replies:** 2\ **Last updated:** [October 21, 2026, 11:38pm UTC](https://developer.squareup.com/forums/t/sandbox-subscription-billing-period-dates-and-unknown-creation-outcome/28267 "2026-10-21T23:38:36Z")
We are validating fixed-price monthly Square Sandbox subscriptions with API2026-09-16. The subscription and dedicated owning location use America/New\_York. The first STATIC phase bills the original monthly price plus a o… --- ## [Google Content API vs Merchant API and possible impact on inventory data](https://developer.squareup.com/forums/t/google-content-api-vs-merchant-api-and-possible-impact-on-inventory-data/28192)
**Author:** [@SOSequoyah](https://developer.squareup.com/forums/u/SOSequoyah)\ **Replies:** 5\ **Last updated:** [October 21, 2026, 10:04pm UTC](https://developer.squareup.com/forums/t/google-content-api-vs-merchant-api-and-possible-impact-on-inventory-data/28192 "2026-10-21T22:04:54Z")
Hello. I am experiencing an issue with pushing inventory levels to Google. I have inventory tracking enabled, inventory level listed, and Google Local enabled on each item. Google Merchant Center shows over 2.3k items mi… --- ## [Square Production Webhooks Returning 401 — Signature Mismatch](https://developer.squareup.com/forums/t/square-production-webhooks-returning-401-signature-mismatch/28223)
**Author:** [@Loo](https://developer.squareup.com/forums/u/Loo)\ **Replies:** 5\ **Last updated:** [October 21, 2026, 8:40pm UTC](https://developer.squareup.com/forums/t/square-production-webhooks-returning-401-signature-mismatch/28223 "2026-10-21T20:40:30Z")
All our Square Production webhooks return 401, including real payments, refunds, and test events. We’ve verified the signing key, notification URL, raw request body, and HMAC-SHA256 implementation. Everything appears co… --- ## [CustomAttributeValues Key issue (C# SDK 45.0.1)](https://developer.squareup.com/forums/t/customattributevalues-key-issue-c-sdk-45-0-1/28130)
**Author:** [@cbstl](https://developer.squareup.com/forums/u/cbstl)\ **Replies:** 5\ **Last updated:** [October 21, 2026, 8:31pm UTC](https://developer.squareup.com/forums/t/customattributevalues-key-issue-c-sdk-45-0-1/28130 "2026-10-21T20:31:03Z")
I’m finally updating my C# web app that uses the Square API from SDK v40.1.0 (just before the significant breaking-changes SDK overhaul) to 45.0.1 and I’m running into an issue with the Key for CustomAttributeValues work… --- ## [Sandbox: canceling PENDING subscription schedules cancellation one day after future start](https://developer.squareup.com/forums/t/sandbox-canceling-pending-subscription-schedules-cancellation-one-day-after-future-start/28246)
**Author:** [@ESU](https://developer.squareup.com/forums/u/ESU)\ **Replies:** 2\ **Last updated:** [October 21, 2026, 7:28pm UTC](https://developer.squareup.com/forums/t/sandbox-canceling-pending-subscription-schedules-cancellation-one-day-after-future-start/28246 "2026-10-21T19:28:02Z")
Subscription ID: a45bdfae-a7eb-4941-ab24-82c784641689 Timezone: America/Chicago Future start: November 18, 2026 Cancellation requested: October 17, while PENDING CancelSubscription returned cancellation date November 19 … --- ## [iOS In-App Payments SDK 1.6.7: 3DS challenges fail with buyer\_verification\_unexpected since Oct 17, 2026 (three-ds-authentication returns 400)](https://developer.squareup.com/forums/t/ios-in-app-payments-sdk-1-6-7-3ds-challenges-fail-with-buyer-verification-unexpected-since-oct-17-2026-three-ds-authentication-returns-400/28260)
**Author:** [@n000r111](https://developer.squareup.com/forums/u/n000r111)\ **Replies:** 1\ **Last updated:** [October 21, 2026, 6:52pm UTC](https://developer.squareup.com/forums/t/ios-in-app-payments-sdk-1-6-7-3ds-challenges-fail-with-buyer-verification-unexpected-since-oct-17-2026-three-ds-authentication-returns-400/28260 "2026-10-21T18:52:55Z")
Hi Square team, Since around 2026-10-17 07:16 UTC, card-on-file registration with 3DS has been failing on iOS for most cards that require a challenge. We’d like help finding out why Square rejects these verifications. E… --- ## [Access to first party delivery via API](https://developer.squareup.com/forums/t/access-to-first-party-delivery-via-api/28265)
**Author:** [@goodlazy](https://developer.squareup.com/forums/u/goodlazy)\ **Replies:** 1\ **Last updated:** [October 21, 2026, 6:19pm UTC](https://developer.squareup.com/forums/t/access-to-first-party-delivery-via-api/28265 "2026-10-21T18:19:31Z")
Hello, my understanding is that by default, first party delivery is not available in the API. Can I get enrolled to gain access? Profile is Good Lazy. --- ## [Sandbox subscription checkout, renewal failure, and recovery verification](https://developer.squareup.com/forums/t/sandbox-subscription-checkout-renewal-failure-and-recovery-verification/28244)
**Author:** [@Symmetry](https://developer.squareup.com/forums/u/Symmetry)\ **Replies:** 1\ **Last updated:** [October 21, 2026, 6:07pm UTC](https://developer.squareup.com/forums/t/sandbox-subscription-checkout-renewal-failure-and-recovery-verification/28244 "2026-10-21T18:07:23Z")
We need help completing pre-launch verification for a US/USD subscription integration using Square API version 2026-09-16. Verified: • Sandbox $20 activation and $5 checkout payments map correctly to our test account. … [Next page](https://developer.squareup.com/forums/latest.md?page=1)