# Errors The errors that may occur when posting requests. ## Topics ### Constants [`const String ACCESS_DENIED;`](/documentation/CloudKitJS/CloudKit.CKError/ACCESS_DENIED) You don’t have permission to access the endpoint, record, zone, or database. [`const String ATOMIC_ERROR;`](/documentation/CloudKitJS/CloudKit.CKError/ATOMIC_ERROR) An atomic batch operation failed. [`const String AUTH_PERSIST_ERROR;`](/documentation/CloudKitJS/CloudKit.CKError/AUTH_PERSIST_ERROR) [`const String AUTHENTICATION_FAILED;`](/documentation/CloudKitJS/CloudKit.CKError/AUTHENTICATION_FAILED) Authentication was rejected. [`const String AUTHENTICATION_REQUIRED;`](/documentation/CloudKitJS/CloudKit.CKError/AUTHENTICATION_REQUIRED) The request requires authentication but none was provided. [`const String BAD_REQUEST;`](/documentation/CloudKitJS/CloudKit.CKError/BAD_REQUEST) The request was not valid. [`const String CONFIGURATION_ERROR;`](/documentation/CloudKitJS/CloudKit.CKError/CONFIGURATION_ERROR) CloudKit JS configuration error. For example, no containers are configured. [`const String CONFLICT;`](/documentation/CloudKitJS/CloudKit.CKError/CONFLICT) The `recordChangeTag` value expired. (Retry the request with the latest tag.) [`const String EXISTS;`](/documentation/CloudKitJS/CloudKit.CKError/EXISTS) The resource that you attempted to create already exists. [`const String INTERNAL_ERROR;`](/documentation/CloudKitJS/CloudKit.CKError/INTERNAL_ERROR) An internal error occurred. [`const String INVALID_ARGUMENTS;`](/documentation/CloudKitJS/CloudKit.CKError/INVALID_ARGUMENTS) The parameters you provided for this method are invalid. [`const String NETWORK_ERROR;`](/documentation/CloudKitJS/CloudKit.CKError/NETWORK_ERROR) A network error occurred, such as a connection time out. [`const String NOT_FOUND;`](/documentation/CloudKitJS/CloudKit.CKError/NOT_FOUND) The resource was not found. [`const String QUOTA_EXCEEDED;`](/documentation/CloudKitJS/CloudKit.CKError/QUOTA_EXCEEDED) If accessing the public database, you exceeded the app’s quota. If accessing the private database, you exceeded the user’s iCloud quota. [`const String SERVICE_UNAVAILABLE;`](/documentation/CloudKitJS/CloudKit.CKError/SERVICE_UNAVAILABLE) The CloudKit service could not be reached. [`const String SHARE_UI_TIMEOUT;`](/documentation/CloudKitJS/CloudKit.CKError/SHARE_UI_TIMEOUT) The share UI failed to load and timed out. [`const String SIGN_IN_FAILED;`](/documentation/CloudKitJS/CloudKit.CKError/SIGN_IN_FAILED) The user failed to sign in. [`const String THROTTLED;`](/documentation/CloudKitJS/CloudKit.CKError/THROTTLED) The request was throttled. Try the request again later. [`const String TRY_AGAIN_LATER;`](/documentation/CloudKitJS/CloudKit.CKError/TRY_AGAIN_LATER) An internal error occurred. Try the request again. [`const String UNEXPECTED_SERVER_RESPONSE;`](/documentation/CloudKitJS/CloudKit.CKError/UNEXPECTED_SERVER_RESPONSE) CloudKit JS was not able to decode the server response. [`const String UNIQUE_FIELD_ERROR;`](/documentation/CloudKitJS/CloudKit.CKError/UNIQUE_FIELD_ERROR) The server rejected the request because there was a conflict with a unique field. [`const String UNKNOWN_ERROR;`](/documentation/CloudKitJS/CloudKit.CKError/UNKNOWN_ERROR) An unknown error occurred. For example, if the server returns an error that is not recognized by the version of CloudKit JS you are using. [`const String VALIDATING_REFERENCE_ERROR;`](/documentation/CloudKitJS/CloudKit.CKError/VALIDATING_REFERENCE_ERROR) The request violates a validating reference constraint. [`const String ZONE_NOT_FOUND;`](/documentation/CloudKitJS/CloudKit.CKError/ZONE_NOT_FOUND) The zone specified in the request was not found. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)