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

This is Saeid from Drion.ai Ag company in Germany. We are s marketing startup and we are developing a marketing platform we need to give opportunity to our users to sign in using Apple ID. I have sent all of the company documents, my ID card, and all documents that we have in our company just to activate the AppID login API and it is nothing after more than 2 months. I had a call from Apple support and she told me to send some documents I did it, but nothing yet. Is this Apple company's suport for developers?!

I am currently working on a Visual Basic .NET project and aim to integrate an internal application with the Apple Business Manager API to access DEP (Device Enrollment Program) device data. Specifically, I would like to request any guidance on the following aspects: Generating a Valid Access Token: I am aware that JSON tokens are required to interact with the API, but I am unsure of the correct procedure to create a valid token for accessing the Apple Business Manager data. How to set permissions for accessing DEP Device Data: What steps do I need to follow to obtain the necessary permissions to read DEP device data from Apple Buiness Manager? Are there specific configurations or approval processes that need to be completed within Apple Developer Account oder Apple Business Manager account (which both uses same Apple ID)? API Endpoints and Documentation to access Business Manager by API: Could you please point me to the relevant APIs and endpoints for interacting with the DEP data? Which web requests to send where? Any documentation that outlines the API structure fur Business Manager access and how and where to obtain access tokens for it. Thanks for any assistance as I stuck here since it is ma first project accessing Apple APIs.

Dear support team, i hav to renew the Apple Push-Tokens between MS Endpoint and Apple SchoolManager on several tenants/mdm. It always end with an error. I a´m using Microsoft Edge, Windows 11

I'm looking for documentation on how to connect to Apple's threat intelligence source data via API or XML. If you have this info please reply, thanks!

Hi Apple Community , We are a MDM vendor and have been testing around implementing BYOD User Enrollment. Where in a step we felt good to have a list of managed apple ids associated with an Organization which would be helpful in inserting them in the MDM payload for Account-driven User Enrollment. To do this I have used a managed apple id in Apple Buisness Manager with Roles Content Manager, Device Enrolment Manager and People Manager and a MDM server From the MDM Server I used the token and have generated a auth_session_token and used it as Header X-ADM-Auth-Session to end point https://mdmenrollment.apple.com/account GET to get the account details The response contains list of urls of which `https://mdmenrollment.apple.com/roster/class/person' POST was there which when tried gives ORGANIZATION_NOT_SUPPORTED 400 response. we are unable to retrieve the list of users in a Apple Buisness Manager Account at this point. Is there any ways to achieve what we are tend to do. But in the Roster API