Apple CloudKit · Authentication Profile

Cloudkit Authentication

Authentication

Apple CloudKit secures its APIs with apiKey across 2 declared security schemes, as derived from its OpenAPI definitions.

AppleCloud StorageCloudKitDatabaseiCloudMobileSyncWeb Services
Methods: apiKey Schemes: 2 OAuth flows: API key in: header, query

Security Schemes

cloudKitApiToken apiKey
· in: query (ckAPIToken)
serverToServer apiKey
· in: header (X-Apple-CloudKit-Request-SignatureV1)

Source

Authentication Profile

cloudkit-authentication.yml Raw ↑ 
generated: '2026-07-11'
method: derived
source: openapi/cloudkit-openapi.yml
summary:
  types:
  - apiKey
  api_key_in:
  - header
  - query
schemes:
- name: cloudKitApiToken
  type: apiKey
  in: query
  parameter: ckAPIToken
  description: |-
    CloudKit API token issued from the CloudKit dashboard, appended to
    the request URL as `ckAPIToken`. Required for end-user authenticated
    access via web auth tokens.
  sources:
  - openapi/cloudkit-openapi.yml
- name: serverToServer
  type: apiKey
  in: header
  parameter: X-Apple-CloudKit-Request-SignatureV1
  description: |-
    Server-to-server authentication uses ECDSA-signed requests with
    `X-Apple-CloudKit-Request-KeyID`, `X-Apple-CloudKit-Request-ISO8601Date`,
    and `X-Apple-CloudKit-Request-SignatureV1` headers.
  sources:
  - openapi/cloudkit-openapi.yml