Better AuthBA
Better Auth•10mo ago
luksch42

Sign in with Apple in web fails / error: 'invalid_client'

I'm facing issues with Sign in with Apple in my Better Auth setup:

Current Status

  • ✅ Apple Sign In works in my Expo (native) app using ID token
  • ❌ Apple Sign In fails on web
## Configuration Details
  • Using Better Auth with Expo plugin
  • JWT payload for client secret looks correct:
    {
  "aud": "https://appleid.apple.com",
  "iss": "xxx",
  "iat": 1741190805,
  "exp": 1772294802,
  "sub": "de.xxx.web"
}
  • Web Service ID: de.xxx.web
  • App Bundle ID: de.xxx.app
## Error Messages
Server logs show:
INFO [Better Auth]: If it's a valid URL, please add https://appleid.apple.com to trustedOrigins
ERROR [Better Auth]: Invalid origin: https://appleid.apple.com
ERROR [Better Auth]: { error: 'invalid_client', status: 400, statusText: 'Bad Request' }


I've added https://appleid.apple.com to trustedOrigins as suggested (should not be needed?), but still experiencing web authentication issues. Any ideas what might be causing this discrepancy between native and web authentication?
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