Hello Apple Developer Community, I'm experiencing an invalid_client error (HTTP 400) when attempting to authenticate with the Apple School Manager API using OAuth2 with JWT bearer assertion (RFC 7523). Despite verifying all configuration values and following Apple's documentation, I continue to receive this error. Error Details Error: invalid_client HTTP Status: 400 Bad Request Endpoint: https://appleid.apple.com/auth/oauth2/v2/token Response: {"error": "invalid_client"} My Configuration All values have been verified to match Apple School Manager exactly: Organization ID: 55155430 Key ID: 8136a1f6-c995-4010-b964-bc8278c107ef Client ID (Service ID): SCHOOLAPI.7c0c10a0-4d8a-4ef8-a2be-eda040b65c59 Private Key: Loads correctly, signs JWT properly (ES256) JWT Configuration I'm generating a JWT with the following structure: Header: { "alg": "ES256", "kid": "8136a1f6-c995-4010-b964-bc8278c107ef", "typ": "JWT" } Payload: { "iss": "55155430", "sub": "SCHOOLAPI.7c0c10a0-4d8a-4ef8-a2be-eda040b65c59", "aud": "https://appleid.apple.com", "iat": [timestamp], "exp": [timestamp + 30 days] } Token Request Method: POST Content-Type: application/x-www-form-urlencoded Parameters: grant_type: client_credentials client_assertion_type: urn:ietf:params:oauth:client-assertion-type:jwt-bearer client_assertion: [JWT token] scope: https://api.apple.com/auth/schoolmanager What I've Verified ✅ All configuration values match Apple School Manager exactly ✅ Private key file exists and loads correctly ✅ JWT is generated with correct structure (ES256, proper claims) ✅ Key ID in JWT header matches the Key ID from Apple School Manager ✅ Request format matches OAuth2 RFC 7523 specification ✅ Content-Type header is application/x-www-form-urlencoded ✅ Tried both Client ID and Organization ID as sub claim (both fail with same error) ✅ DNS resolution and API connectivity are working ✅ API account appears active in Apple School Manager interface What I've Tried Using Client ID as sub: Tried using SCHOOLAPI.7c0c10a0-4d8a-4ef8-a2be-eda040b65c59 as the sub claim Using Organization ID as sub: Tried using 55155430 as the sub claim (fallback) With and without scope: Tried both including and excluding the scope parameter Different JWT expiration: Tried various expiration times (30 days, 180 days) Verified Service ID format: Confirmed the Client ID follows the SCHOOLAPI.xxxxx-xxxxx-xxxxx format Both attempts (Client ID and Organization ID as sub) return the same invalid_client error. Previous Support Interaction I've contacted Apple Developer Support (Case #102783504559). They confirmed: The technical implementation is correct The issue is an account access/permission problem My Apple Account email is not associated with any memberships The Account Holder must add me to the Enterprise team membership However, I'm posting here to see if anyone in the community has: Experienced similar issues and found a solution Additional technical insights about the invalid_client error Suggestions for what else to verify or try Questions Is there a specific format requirement for the sub claim? Should it be the Client ID (Service ID) or Organization ID? I've tried both. Are there any additional claims required in the JWT beyond iss, sub, aud, iat, exp? Could there be a backend issue with the API account even though it appears active in Apple School Manager? Has anyone successfully resolved an invalid_client error that wasn't related to account access? Is there a delay after creating an API account before it becomes fully active for authentication? Technical Details Language: Python (Flask) JWT Library: PyJWT with cryptography library Algorithm: ES256 (ECDSA P-256) OAuth2 Flow: Client Credentials Grant with JWT Bearer Assertion (RFC 7523) Error Log I've generated a detailed error log showing the exact request/response. The key points: HTTP 400 Bad Request Response: {"error":"invalid_client"} Same error occurs with both Client ID and Organization ID as sub Any Help Appreciated If anyone has encountered this issue or has insights into what might be causing it, I'd greatly appreciate your help. I'm happy to provide additional details or try any suggestions. Thank you! Case Number: 102783504559 API Account: Created in Apple School Manager Status: API account appears active, but authentication fails

Hi everyone, I'm experiencing a persistent issue with Sign in with Apple on my iOS app that I cannot resolve from my side. I've already opened a support case (ID: 20000115382721) and received a reply directing me back to the Developer Forum, so I'm posting here in hopes someone has encountered the same issue or can offer guidance. Error message: FirebaseAuthException: [firebase_auth/invalid-credential] Invalid OAuth response from apple.com Critical observation: The Apple authentication screen never appears. When the user taps "Continue with Apple", the error is returned immediately. This suggests the request is being rejected before reaching Apple's authentication servers — pointing to a backend configuration issue on Apple's side for my Team ID. My setup: Team ID: DHKU23JL7H Bundle ID: com.expensespy.app Framework: Flutter with sign_in_with_apple package v7.0.1 Backend: Firebase Authentication Other auth methods (Google Sign-In, Email/Password): working correctly Verified configuration (all done correctly): App ID (com.expensespy.app): Sign In with Apple capability is enabled Configured as a primary App ID Not grouped with any other App ID Service ID (com.expensespy.app.auth): Created and linked to the primary App ID Domain: expensespy-e11ab.firebaseapp.com Return URL: https://expensespy-e11ab.firebaseapp.com/__/auth/handler All other redundant Service IDs have been removed Sign In with Apple Key: Created with Key ID X8T9NLBT4Y Linked to the primary App ID .p8 file is available Firebase Apple provider: Tested with OAuth code flow fields populated (Services ID, Team ID, Key ID, Private Key) — same error Tested with OAuth code flow fields empty (recommended for iOS-only) — same error Client-side implementation: Proper nonce generation with SHA256 hashing OAuthProvider('apple.com').credential() with idToken and rawNonce Tested across 3 different builds (Build 12, 13, 14) Tested on multiple iOS devices (iOS 18+) What I've ruled out: Client-side code (tested 3 different implementations) Firebase configuration (tested both populated and empty) Multiple Service IDs (cleaned up to just one) App ID configuration (verified primary status) Context: During my Apple Developer Program enrollment, I experienced an error that was not fully resolved. I suspect this may have left my account in a state where Sign in with Apple is not fully activated on the Apple backend for my Team ID. Question: Has anyone encountered this where the Apple auth screen never appears at all? Is there a way to verify that Sign in with Apple is properly provisioned for a specific Team ID on Apple's backend? My App Store submission is blocked by this since Sign in with Apple is required when offering third-party authentication. Any guidance from Apple engineers or developers who solved a similar issue would be deeply appreciated. Thanks!

When I submit an https web request I receive both of those funny errors. In particular I do not understand what that “Sectigo Public Server Authentication” message represents, perhaps yet another certification for Apple to access the request, when of course by connecting to that web address on Safari produces no errors. Connection error: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.PerfPowerTelemetryClientRegistrationService was invalidated: Connection init failed at lookup with error 159 - Sandbox restriction." UserInfo={NSDebugDescription=The connection to service named com.apple.PerfPowerTelemetryClientRegistrationService was invalidated: Connection init failed at lookup with error 159 - Sandbox restriction.} (+[PPSClientDonation isRegisteredSubsystem:category:]) Permission denied: Maps / SpringfieldUsage (+[PPSClientDonation sendEventWithIdentifier:payload:]) Invalid inputs: payload={ isSPR = 1; } urlstring=https://taxiprofessional.net/***.php process loading tcp_input [C2.1.1.1:3] flags=[R] seq=2572529641, ack=2572529641, win=251 state=ESTABLISHED rcv_nxt=2572535079, snd_una=3494441675 tcp_input [C2.1.1.1:3] flags=[R] seq=2572535079, ack=2572535079, win=1981 state=ESTABLISHED rcv_nxt=2572535079, snd_una=3494441675 nw_endpoint_flow_failed_with_error [C2.1.1.1 82.223.15.117:443 in_progress channel-flow (satisfied (Path is satisfied), viable, interface: pdp_ip0[lte], ipv4, dns, expensive, uses cell, LQM: moderate)] already failing, returning nw_endpoint_flow_failed_with_error [C2.1.1.1 82.223.15.117:443 cancelled channel-flow ((null))] already failing, returning Connection 2: received failure notification Connection 2: received ECONNRESET with incomplete TLS handshake - generating errSSLClosedNoNotify Connection 2: failed to connect 3:-9816, reason -1 Connection 2: encountered error(3:-9816) Task <7879BCCC-47A3-44C8-A74A-560231AA4AE5>.<1> HTTP load failed, 0/0 bytes (error code: -1200 [3:-9816]) Task <7879BCCC-47A3-44C8-A74A-560231AA4AE5>.<1> finished with error [-1200] Error Domain=NSURLErrorDomain Code=-1200 "Connessione sicura non riuscita a causa di un errore TLS." UserInfo={NSURLErrorFailingURLPeerTrustErrorKey=<SecTrustRef: 0x121bd4240>, NSErrorFailingURLKey=https://taxiprofessional.net/...php, NSErrorFailingURLStringKey=https://taxiprofessional.net/....php, NSErrorClientCertificateStateKey=0, NSErrorPeerCertificateChainKey=( "<cert(0x11bfcca00) s: *.taxiprofessional.net i: Sectigo Public Server Authentication CA DV R36>", "<cert(0x121a27200) s: *.taxiprofessional.net i: Sectigo Public Server Authentication CA DV R36>", "<cert(0x122dac000) s: Sectigo Public Server Authentication CA DV R36 i: Sectigo Public Server Authentication Root R46>" ), _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <7879BCCC-47A3-44C8-A74A-560231AA4AE5>.<1>, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDataTask <7879BCCC-47A3-44C8-A74A-560231AA4AE5>.<1>" ), NSLocalizedDescription=Connessione sicura non riuscita a causa di un errore TLS., _kCFStreamErrorDomainKey=3, NSUnderlyingError=0x121b7b0c0 {Error Domain=kCFErrorDomainCFNetwork Code=-1200 "(null)" UserInfo={_kCFNetworkCFStreamSSLErrorOriginalValue=-9816, kCFStreamPropertySSLPeerCertificates=( "<cert(0x11bfcca00) s: *.taxiprofessional.net i: Sectigo Public Server Authentication CA DV R36>", "<cert(0x121a27200) s: *.taxiprofessional.net i: Sectigo Public Server Authentication CA DV R36>", "<cert(0x122dac000) s: Sectigo Public Server Authentication CA DV R36 i: Sectigo Public Server Authentication Root R46>" ), _kCFStreamPropertySSLClientCertificateState=0, kCFStreamPropertySSLPeerTrust=<SecTrustRef: 0x121bd4240>, _NSURLErrorNWPathKey=satisfied (Path is satisfied), viable, interface: pdp_ip0[lte], ipv4, dns, expensive, uses cell, LQM: moderate, _kCFStreamErrorDomainKey=3, _kCFStreamErrorCodeKey=-9816}}, _kCFStreamErrorCodeKey=-9816}

Hello, I have a question regarding the lifecycle of user consent and tokens in "Sign in with Apple." Specifically, I would like to understand the behavior of the auth/revoke API in relation to App Store Connect status changes. Impact of App Status Changes If an app is "Removed from Sale" or "Deleted" from App Store Connect, does Apple automatically revoke all associated user tokens and consent? Or is it still the developer's responsibility to programmatically revoke each user's token via the REST API to ensure the app is removed from the user’s "Apps Using Apple ID" list? API Availability after Removal Once an app is no longer available on the App Store (or its record is deleted in App Store Connect), is the auth/revoke REST API still accessible? I want to ensure that a developer can still perform necessary privacy clean-up tasks (revoking consent) even if the app is not currently distributed. Specific User Impacts of Non-Revocation If we do not call the revocation API, besides the app remaining in the "Sign in with Apple" list, what are the specific consequences for the user? Thank you for your guidance.

Hello. When a user revokes Apple Login authorization, I am expecting a webhook to be delivered to our configured endpoint, but I currently not receiving any at all. So I have some questions: Should the revoke event webhook be delivered in real-time? If it is not real-time, when is the webhook supposed to be sent? If my server fails to respond to the webhook request, does Apple retry the delivery? (Actually I couldn't find how to response in this scenario, but if I can) Thanks in advance.

Is there any documentation about the server to server notification, specifically what sort of data Apple servers send to our server when there is an update to users who used Sign in with Apple?

Hi Apple Developer Community, We have carefully reviewed the documentation on App Transfer and User Migration, but we still have a few unresolved questions regarding Apple Sign-In token behavior and testing strategies. Would appreciate any guidance! Token Behavior for Pre-Transfer App Versions After the app transfer: If a user logs in via an existing pre-transfer version of the app (published under Team A before transfer), will the Apple Sign-In token’s sub (or private email) switch to new value tie to Team B, or unchanged? This is critical for our user migration plan. Preserving sub Across Transfers (Internal Team Transfer) Since our app-transfer is an internal transfer (no change in app ownership outside our organization), is there a way to retain the original sub value（or private email） for users after the transfer? We are concerned that Apple Sign-In errors during the app transfer process may negatively impact user experience. Testing the Transfer Process Safely We’d like to simulate the app transfer and user migration process in a sandbox/test environment before executing it in production. Is there a way to test app transfers without affecting live users? (e.g., a staging mode for transfers) Thank you for your expertise! Any insights would be invaluable.

Question detail Dear Apple Developer Technical Support, We are currently following the official Apple documentation “TN3159: Migrating Sign in with Apple users for an app transfer” to carry out a Sign in with Apple user migration after successfully transferring several apps to a new developer account. Here is a summary of our situation: Under the original Apple developer account, we had five apps using Sign in with Apple, grouped under a shared primary app using App Grouping. Recently, we transferred three of these apps to our new Apple developer account via App Store Connect. After the transfer, these three apps are no longer associated with the original primary App ID. We reconfigured individual Services IDs for each app in the new account and enabled Sign in with Apple for each. More than 24 hours have passed since the app transfer was completed. Now we are attempting to follow the migration process to restore user access via the user.migration flow. Specifically, we are using the following script to request an Apple access token: url = "https://appleid.apple.com/auth/token" headers = {"Content-Type": "application/x-www-form-urlencoded"} data = { "grant_type": "client_credentials", "scope": "user.migration", "client_id": "com.game.friends.ios.xxxx", # New Primary ID in the new account "client_secret": "<JWT signed with new p8 key>" } response = requests.post(url, headers=headers, data=data) However, the API response consistently returns: { "error": "invalid_client" } We have verified that the following configurations are correct: The client_secret is generated using the p8 key from the new account, signed with ES256 and correct key_id, team_id, and client_id. The client_id corresponds to the Services ID created in the new account and properly associated with the migrated app. The scope is set to user.migration. The JWT payload contains correct iss, sub, and aud values as per Apple documentation. The app has been fully transferred and reconfigured more than 24 hours ago. Problem Summary & Request for Support: According to Apple’s official documentation: “After an app is transferred, Apple updates the Sign in with Apple configuration in the background. This can take up to 24 hours. During this time, attempts to authenticate users or validate tokens may fail.” However, we are still consistently receiving invalid_client errors after the 24-hour waiting period. We suspect one of the following issues: The transferred apps may still be partially associated with the original App Grouping or primary App ID. Some Sign in with Apple configuration in Apple’s backend may not have been fully updated after the transfer. Or the Services ID is not yet fully operational for the transferred apps in the new account. We kindly request your assistance to: Verify whether the transferred apps have been completely detached from the original App Grouping and primary App ID. Confirm whether the new Services IDs under the new account are fully functional and eligible for Sign in with Apple with user.migration scope. Help identify any remaining configuration or migration issues that may cause the invalid_client error. If necessary, assist in manually ungrouping or clearing any residual App Grouping relationships affecting the new environment. We have also generated and retained the original transfer_sub identifiers and are fully prepared to complete the sub mapping once the user.migration flow becomes functional. Thank you very much for your time and support!

Goal I want to reply to feedback from customers who signed up using a private.relay account. Problem I am getting this error when sending an email: Reporting-MTA: dns; mailfout.stl.internal X-Postfix-Queue-ID: B87481D0015B X-Postfix-Sender: rfc822; hello@mydomain.com Arrival-Date: Fri, 7 Nov 2025 03:37:29 -0500 (EST) Final-Recipient: rfc822; xxxx@privaterelay.appleid.com Original-Recipient: rfc822;xxxx@privaterelay.appleid.com Action: failed Status: 5.1.1 Remote-MTA: dns; smtp3.privaterelay.appleid.com Diagnostic-Code: smtp; 550 5.1.1 <hello@mydomain.com>: unauthorized sender What have I done? I have configured mydomain.com in the Email Configuration Service inside of apple, as well as the email hello@mydomain.com. Using https://www.mail-tester.com/, I could confirm that the - [SPF] Your server 202.12.124.158 is authorized to use hello@mydomain.com - Your DKIM signature is valid - Your message passed the DMARC test My hunch This app was transferred and the previous owner did not have the email configuration set up. The emails I am writing messages to signed up at that time. Questions: If I rescue the old account and set up the email configuration, would it work? Is there any other tip I could try to apply?

Hi, Before I begin my investigation, I want to explain our code-level support process for issues related to Sign in with Apple—as the issue you’re reporting may be the result of any of the following: An error in your app or web service request. A configuration issue in your Developer Account. An internal issue in the operation system or Apple ID servers. To ensure the issue is not caused by an error within your Private Email Replay configuration, please review Configuring your environment for Sign in with Apple to learn more about registering your email sources and authenticated domains. To prevent sending sensitive message details in plain text, you should create a report in Feedback Assistant to share the details requested below. Additionally, if I determine the error is caused by an internal issue in the operating system or Apple ID servers, the appropriate engineering teams have access to the same information and can communicate with you directly for more information, if needed. Please follow the instructions below to submit your feedback. Gathering required information for troubleshooting Private Email Relay with Sign in with Apple For issues occurring with your email delivery, ensure your feedback contains the following information: the primary App ID and Services ID the user’s Apple ID and/or email address the email message headers the Private Email Relay Service or Hide My Email message delivery failure, and SMTP error codes Submitting your feedback Before you submit to Feedback Assistant, please confirm the requested information above is included in your feedback. Failure to provide the requested information will only delay my investigation into the reported issue within your Sign in with Apple client. After your submission to Feedback Assistant is complete, please respond in your existing Developer Forums post with the Feedback ID. Once received, I can begin my investigation and determine if this issue is caused by an error within your client, a configuration issue within your developer account, or an underlying system bug. Cheers, Paris X Pinkney |  WWDR | DTS Engineer

Hi, Before I begin my investigation, I want to explain our code-level support process for issues related to Sign in with Apple—as the issue you’re reporting may be the result of any of the following: An error in your app or web service request. A configuration issue in your Developer Account. An internal issue in the operation system or Apple ID servers. To ensure the issue is not caused by an error within your app or web service request, please review TN3107: Resolving Sign in with Apple response errors to learn more about common error causes and potential solutions when performing requests. If the technote does not help identify the cause of the error, I need more information about your app or web services to get started. To prevent sending sensitive JSON Web Tokens (JWTs) in plain text, you should create a report in Feedback Assistant to share the details requested below. Additionally, if I determine the error is caused by an internal issue in the operating system or Apple ID servers, the appropriate engineering teams have access to the same information and can communicate with you directly for more information, if needed. Please follow the instructions below to submit your feedback. Gathering required information for troubleshooting Sign in with Apple authorization and token requests For issues occurring with your native app, perform the following steps: Install the Accounts/AuthKit profile on your iOS, macOS, tvOS, watchOS, or visionOS device. Reproduce the issue and make a note of the timestamp when the issue occurred, while optionally capturing screenshots or video. Gather a sysdiagnose on the same iOS, macOS, tvOS, watchOS, or visionOS device. Create a report in Feedback Assistant, and ensure your feedback contains the following information: the primary App ID or Bundle ID the user’s Apple ID, email address, and/or identity token the sysdiagnose gathered after reproducing the issue the timestamp of when the issue was reproduced screenshots or videos of errors and unexpected behaviors (optional) For issues occurring with your web service, ensure your feedback contains the following information: the primary App ID and Services ID the user’s Apple ID, email address, and/or identity token the failing request, including all parameter values, and error responses (if applicable) the timestamp of when the issue was reproduced (optional) screenshots or videos of errors and unexpected behaviors (optional) Important: If providing a web service request, please ensure the client secret (JWT) has an extended expiration time (exp) of at least ten (10) business days, so I have enough time to diagnose the issue. Additionally, if your request requires access token or refresh tokens, please provide refresh tokens as they do not have a time-based expiration time; most access tokens have a maximum lifetime of one (1) hour, and will expire before I have a chance to look at the issue. Submitting your feedback Before you submit to Feedback Assistant, please confirm the requested information above (for your native app or web service) is included in your feedback. Failure to provide the requested information will only delay my investigation into the reported issue within your Sign in with Apple client. After your submission to Feedback Assistant is complete, please respond in your existing Developer Forums post with the Feedback ID. Once received, I can begin my investigation and determine if this issue is caused by an error within your client, a configuration issue within your developer account, or an underlying system bug. Cheers, Paris X Pinkney |  WWDR | DTS Engineer

Would really appreciate support with this invalid_client issue: I have a web app and have aligned the JWT Header and Payload JWT Header { "alg": "ES256", "kid": "ABC123DEFG" } JWT Payload { "iss": "DEF123GHIJ", "iat": 1234567890, "exp": 1234567890, "aud": "https://appleid.apple.com", "sub": "com.yourapp.service" The domains and callback are aligned and correct I've even created a new p8 and updated the Key_ID Sending Credentials to Apple (Token Request) Content-Type: application/x-www-form-urlencoded However, still no luck. Can anyone assist with identifying the possible error? Many thanks

Hello, I notice the link on top of this site is incorrect: https://developer.apple.com/forums/tags/sign-in-with-apple-rest-api Its target (https://developer.apple.com/documentation/sign_in_with_apple/sign_in_with_apple_rest_api) does not exist. It should probably be https://developer.apple.com/documentation/signinwithapplerestapi

Our app ID is 708064914; When we transferred an app with Sign in with Apple function, and request the REST API to get transfer_sub, approximately 25% of the requests return error responses such as: {"error":"invalid_request","error_description":"User not found."} 001307.dba0ea2b147f45aa9e85de2abfb4c072.2047 received the first error; We want to understand under what circumstances these errors occur. Since we have already transferred once before, this is the second transfer. The "User not found" error might be related to IDs from the original team. Is that right?

Our app ID is 708064914; When we transferred an app with Sign in with Apple function, and request the REST API to get transfer_sub, approximately 25% of the requests return error responses such as: {"error":"invalid_request","error_description":"User not found."} or {"error":"invalid_request"} User 001700.6b50fa0cdf564b4f83e3ac6b8dfb9a9b.1205 received the first error; User 000908.523b85e1dd704d808dbfac55425c5a7b.1916 received the second error. Here's the English translation: We want to understand under what circumstances these errors occur. Since we have already transferred once before, this is the second transfer. The "User not found" error might be related to IDs from the original team. However, we don't understand the meaning of the second error type and what circumstances might cause it.

Dear Apple Developer Technical Support, We are currently following the official Apple documentation “TN3159: Migrating Sign in with Apple users for an app transfer” to carry out a Sign in with Apple user migration after successfully transferring several apps to a new developer account. Here is a summary of our situation: Under the original Apple developer account, we had five apps using Sign in with Apple, grouped under a shared primary app using App Grouping. Recently, we transferred three of these apps to our new Apple developer account via App Store Connect. After the transfer, these three apps are no longer associated with the original primary App ID. We reconfigured individual Services IDs for each app in the new account and enabled Sign in with Apple for each. More than 24 hours have passed since the app transfer was completed. Now we are attempting to follow the migration process to restore user access via the user.migration flow. Specifically, we are using the following script to request an Apple access token: url = "https://appleid.apple.com/auth/token" headers = {"Content-Type": "application/x-www-form-urlencoded"} data = { "grant_type": "client_credentials", "scope": "user.migration", "client_id": "com.game.friends.ios.toptop.sea", # New Services ID in the new account "client_secret": "<JWT signed with new p8 key>" } response = requests.post(url, headers=headers, data=data) However, the API response consistently returns: { "error": "invalid_client" } We have verified that the following configurations are correct: The client_secret is generated using the p8 key from the new account, signed with ES256 and correct key_id, team_id, and client_id. The client_id corresponds to the Services ID created in the new account and properly associated with the migrated app. The scope is set to user.migration. The JWT payload contains correct iss, sub, and aud values as per Apple documentation. The app has been fully transferred and reconfigured more than 24 hours ago. Problem Summary & Request for Support: According to Apple’s official documentation: “After an app is transferred, Apple updates the Sign in with Apple configuration in the background. This can take up to 24 hours. During this time, attempts to authenticate users or validate tokens may fail.” However, we are still consistently receiving invalid_client errors after the 24-hour waiting period. We suspect one of the following issues: The transferred apps may still be partially associated with the original App Grouping or primary App ID. Some Sign in with Apple configuration in Apple’s backend may not have been fully updated after the transfer. Or the Services ID is not yet fully operational for the transferred apps in the new account. We kindly request your assistance to: Verify whether the transferred apps have been completely detached from the original App Grouping and primary App ID. Confirm whether the new Services IDs under the new account are fully functional and eligible for Sign in with Apple with user.migration scope. Help identify any remaining configuration or migration issues that may cause the invalid_client error. If necessary, assist in manually ungrouping or clearing any residual App Grouping relationships affecting the new environment. We have also generated and retained the original transfer_sub identifiers and are fully prepared to complete the sub mapping once the user.migration flow becomes functional. Thank you very much for your time and support!

Hi Apple Developer Support, We are implementing Sign in with Apple for our web application hosted on example.com. In the Service ID settings, we have configured the following: Service ID (client_id): com.example.service.local Web Domain: example.com Return URL: https://2db2-121-160-153-88.ngrok-free.app/login/oauth2/code/apple We also tested login via the following URL from our web application: https://appleid.apple.com/auth/authorize?response_mode=form_post&response_type=code&client_id=com.example.service.local&scope=name%20email&state=2f9gMY1rTe12-O7Wbnb7KWe504HQ0KWBSHTKHbg9ZEY=&redirect_uri=https://2db2-121-160-153-88.ngrok-free.app/login/oauth2/code/apple However, we’re receiving an invalid_client error after submission. Our questions: Is it valid to use an ngrok URL like https://2db2-121-160-153-88.ngrok-free.app/... as the Return URL for development and testing? Does the Web Domain need to match the ngrok domain, or is it enough to register the production domain (e.g., example.com)? Is there any propagation delay or approval process after updating the Return URL in the Service ID? Is the client_id strictly required to match the Service ID exactly? We would greatly appreciate any insights or best practices to help us resolve this issue. Thank you in advance!

On Wednesday, June 18, 2025, Sign in with Apple was impacted by a configuration issue which affected some developer accounts that created new app or Services ID configurations, or edited existing configurations, resulting in the following errors: invalid_client response error returned by the authentication, token validation/revocation, and user migration requests "Sign Up Not Completed" (or equivalent) error presented from the Authentication Services framework. On Monday, June 23, 2025, this issue was resolved. Please retry the Sign in with Apple flows in your Sign in with Apple enabled apps and websites to confirm your developer account configuration has been fixed. Please let us know if you can still reproduce this issue with your developer account. If so, follow the steps outlined in the post below: Gathering required information for troubleshooting Sign in with Apple authorization and token requests https://developer.apple.com/forums/thread/762831 Finally, reply (not comment) with your Feedback ID on either of the posts below: https://developer.apple.com/forums/thread/789011 https://developer.apple.com/forums/thread/789132 Cheers, Paris X Pinkney |  WWDR | DTS Engineer

On Thursday, June 12, 2025, Sign in with Apple was impacted by an incorrect subdomain defined in its /.well-known/openid-configuration file. The JSON returned incorrectly provided https://account.apple.com instead of the expected https://appleid.apple.com. For Sign in with Apple, the value for the issuer (iss) claim in the user's identity token is https://appleid.apple.com. Additionally, if your clients use the Sign in with Apple REST API, the following endpoints should be used for each request: https://appleid.apple.com/auth/authorize https://appleid.apple.com/auth/token https://appleid.apple.com/auth/revoke https://appleid.apple.com/auth/keys This issue with the /.well-known/openid-configuration file was resolved the same day. Use the URL below to confirm the expected subdomain is provided, as needed: https://appleid.apple.com/.well-known/openid-configuration Cheers, Paris X Pinkney |  WWDR | DTS Engineer

We’re integrating Sign in with Apple using Apple’s official JavaScript SDK: https://appleid.cdn-apple.com/appleauth/static/jsapi/appleid/1/en_US/appleid.auth.js We’ve successfully used this setup with an older Service ID, but when we try to use any newly created Service ID, we get the following error immediately when calling AppleID.auth.signIn(): invalid_client This happens before any request reaches our backend. The same flow, redirect URI, and frontend code works fine with an old Service ID — but fails with new ones. ✅ What We’ve Verified: The Service ID (e.g., com.projectx.web.login) is created under Apple Developer → Identifiers → Service IDs The redirect URI is correct and matches exactly (HTTPS, no trailing slash) No client_secret is passed in the frontend (by design) We’re using usePopup: true ❌ What Doesn’t Work: Any new Service ID we create — even on the same domain and configuration — fails with invalid_client. 🔁 What We’ve Tried: Creating multiple new Service IDs Waiting 48+ hours in case of propagation delays Validating HTTPS and redirect URI setup Comparing all settings with the working (older) Service ID (which we deleted since we thought that was causing a problem) Testing in different environments and browsers ❓ Questions: Why do newly created Service IDs fail with invalid_client while older ones work? Are there undocumented requirements, propagation delays, or steps for new Service IDs to become active? Is this a known limitation or bug in the SDK? 💻 Our Code: import { useEffect } from "react"; import { Button, Box } from "@mui/material"; import api from "../utils/api"; // Axios wrapper import AppleIcon from "@mui/icons-material/Apple"; import MainAuthStyles from "../pages/MainAuthStyles"; import { useUser } from "../../../user-module/src/contexts/UserContext"; import { useNavigate } from "react-router-dom"; // Apple global type declare global { interface Window { AppleID: any; } } type AppleSignInButtonProps = { setApiError: (msg: string) => void; }; const AppleLogInButton = ({ setApiError }: AppleSignInButtonProps) => { const { user, setUser } = useUser(); const navigate = useNavigate(); useEffect(() => { if (!window.AppleID) return; window.AppleID.auth.init({ clientId: import.meta.env.VITE_APPLE_CLIENT_ID, scope: "name email", redirectURI: import.meta.env.VITE_APPLE_REDIRECT_URI, usePopup: true, }); }, []); const handleAppleLogin = async () => { try { const response = await window.AppleID.auth.signIn(); const { id_token, code, user } = response.authorization; const res = await api.post("/auth/apple-login", { idToken: id_token, code, user, rememberMe: true, }); if (res.data.success == true && res.data.user.userDataInitialised == true ) { setUser({ id: res.data.user.id ? res.data.user.id : '', fullName: res.data.user.fullName ? res.data.user.fullName : '', email: res.data.user.email ? res.data.user.email : '', role: res.data.user.role ? res.data.user.role : '', signUpType: res.data.user.signUpType ? res.data.user.signUpType : '', userDataInitialised: res.data.user.userDataInitialised ? res.data.user.userDataInitialised : false, }); localStorage.setItem("accessToken", res.data.accessToken); localStorage.setItem("refreshToken", res.data.refreshToken); navigate("/app") } else { setApiError("Unrecognized login method") return; } } catch (err) { console.error("Apple Sign-In failed", err); setApiError("AppleSignInFailed"); } }; return ( <Box mt={2}> <Button variant="outlined" fullWidth onClick={handleAppleLogin} className="AuthAppleButton" startIcon={<AppleIcon />} > Log in with Apple </Button> </Box> ); }; export default AppleLogInButton; Any help from the Apple team or anyone who's resolved this issue would be appreciated — we’re currently blocked on deploying new environments due to this error. Thanks!