Apple CloudKit

Apple CloudKit is the cloud backend for iOS, iPadOS, macOS, tvOS, watchOS, visionOS, and the web. CloudKit Web Services is the public REST surface that lets non-Apple-platform clients (web apps, servers) read and write data into a CloudKit container's public, private, or shared database. The web service is hosted at api.apple-cloudkit.com and accepts either an API token (for end-user-authenticated access) or a server-to- server ECDSA key for backend access. Operations cover records, zones, subscriptions, assets, users, and database changes.

Apple CloudKit publishes 7 APIs on the APIs.io network, including Assets API, Changes API, Records API, and 4 more. Tagged areas include Apple, Cloud Storage, CloudKit, Database, and iCloud.

The Apple CloudKit catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Apple CloudKit’s developer surface includes authentication, documentation, developer console, sandbox, changelog, CLI, API reference, and 33 more developer resources.

🌐 Visit website 📡 Source on GitHub

65.0/100 strong ▬ flat Agent 24/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Apple Cloud StorageCloudKitDatabaseiCloudMobile Sync Web Services

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 65.0/100 · strong

Contract Quality 11.6 / 23

Developer Ergonomics 14.5 / 18

Access Clarity 10.9 / 18

Operational Transparency 8.9 / 12

Contract Governance 7.9 / 11

Discoverability 5.3 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/cloudkit: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 10

Individual APIs this provider publishes, each with its own machine-readable definition.

CloudKit Web Services

The CloudKit Web Services REST API is structured as /database/1/{container}/{environment}/{database}/{operation}, where database is one of public, private, or shared and environ...

CloudKit JS

CloudKit JS is Apple's JavaScript SDK that wraps the CloudKit Web Services REST API for browser apps. It provides Sign in with Apple authentication, container/database/zone acce...

CloudKit Framework

The native CloudKit framework for iOS, iPadOS, macOS, tvOS, watchOS, and visionOS. Provides programmatic access to CloudKit containers, records, zones, subscriptions, and sharin...

Apple CloudKit Assets API

The Assets API from Apple CloudKit — 2 operation(s) for assets.

Apple CloudKit Changes API

The Changes API from Apple CloudKit — 2 operation(s) for changes.

Apple CloudKit Records API

The Records API from Apple CloudKit — 6 operation(s) for records.

Apple CloudKit Subscriptions API

The Subscriptions API from Apple CloudKit — 3 operation(s) for subscriptions.

Apple CloudKit Tokens API

The Tokens API from Apple CloudKit — 2 operation(s) for tokens.

Apple CloudKit Users API

The Users API from Apple CloudKit — 4 operation(s) for users.

Apple CloudKit Zones API

The Zones API from Apple CloudKit — 4 operation(s) for zones.

Scroll for all 10

Open Collections 9

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Apple CloudKit Web Services Assets API

OPEN COLLECTION

Apple CloudKit Web Services Assets Changes API

OPEN COLLECTION

Apple CloudKit Web Services Assets Records API

OPEN COLLECTION

Apple CloudKit Web Services Assets Subscriptions API

OPEN COLLECTION

Apple CloudKit Web Services Assets Tokens API

OPEN COLLECTION

Apple CloudKit Web Services Assets Users API

OPEN COLLECTION

Apple CloudKit Web Services Assets Zones API

OPEN COLLECTION

Apple CloudKit Web Services

OPEN COLLECTION

Scroll for all 9

Pricing Plans 1

Published pricing tiers and plan structures.

Cloudkit Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Cloudkit Rate Limits

6 limits

RATE LIMITS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Cloudkit Context

0 classes · 8 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Apple CloudKit API Rules

12 rules · 4 errors 6 warnings 2 info

SPECTRAL

Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Cloudkit Authentication

apiKey/signature · 4 schemes

SECURITY

Cloudkit Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Cloudkit Vulnerability Disclosure

Hackerone

SECURITY

Cloudkit Trust Center

ISO/IEC 27001, ISO/IEC 27018, SOC 3

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Cloudkit Agentic Access

23 operations · 23 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

Console

Sandbox

DeveloperPortal

GettingStarted

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

WellKnown

WellKnown

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

JSONLD

Spectral

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

Packages

Packages

SDKs

SDKs

CLI

CLI

GitHubOrganization

GitHubOrganization

Access & Security 7

Authentication, authorization, and security posture

DomainSecurity

Authentication

SecurityTxt

Compliance

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

TrustCenter

TrustCenter

Scroll for all 7

Operate 4

Status, limits, changes, and where to get help

StatusPage

ChangeLog

RateLimits

Support

Commercial 4

Pricing, plans, and the legal terms of use

PrivacyPolicy

Plans

Pricing

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: cloudkit
name: Apple CloudKit
description: Apple CloudKit is the cloud backend for iOS, iPadOS, macOS, tvOS, watchOS, visionOS, and the web. CloudKit Web
  Services is the public REST surface that lets non-Apple-platform clients (web apps, servers) read and write data into a
  CloudKit container's public, private, or shared database. The web service is hosted at api.apple-cloudkit.com and accepts
  either an API token (for end-user-authenticated access) or a server-to- server ECDSA key for backend access. Operations
  cover records, zones, subscriptions, assets, users, and database changes.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/cloudkit.png
url: https://raw.githubusercontent.com/api-evangelist/cloudkit/refs/heads/main/apis.yml
created: '2024-01-01'
modified: '2026-09-05'
specificationVersion: '0.23'
kind: company
tags:
- Apple
- Cloud Storage
- CloudKit
- Database
- iCloud
- Mobile
- Sync
- Web Services
apis:
- aid: cloudkit:web-services
  name: CloudKit Web Services
  tags:
  - REST
  - Records
  - Zones
  - Subscription
  tags_raw:
  - REST
  - Records
  - Zones
  - Subscriptions
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api.apple-cloudkit.com/database/1
  humanURL: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/index.html
  properties:
  - url: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/index.html
    type: Documentation
  - url: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/SettingUpWebServices.html
    type: GettingStarted
  - url: https://developer.apple.com/documentation/cloudkit/obtaining-an-api-token-for-an-icloud-container
    type: APIKeys
  description: The CloudKit Web Services REST API is structured as /database/1/{container}/{environment}/{database}/{operation},
    where database is one of public, private, or shared and environment is development or production. Operations include records
    lookup, query, modify, delete, zone create/list/delete, subscription create/list/delete, asset upload, user info and changes.
    Calls are authenticated using an API token for user-authenticated access (with ckWebAuthToken) or a server-to-server ECDSA
    key for backend access.
- aid: cloudkit:js
  name: CloudKit JS
  tags:
  - JavaScript
  - SDK
  - Web
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.apple.com/documentation/cloudkitjs
  baseURL: https://api.apple-cloudkit.com/database/1
  properties:
  - url: https://developer.apple.com/documentation/cloudkitjs
    type: Documentation
  description: CloudKit JS is Apple's JavaScript SDK that wraps the CloudKit Web Services REST API for browser apps. It provides
    Sign in with Apple authentication, container/database/zone access, queries, record operations, subscriptions, and asset
    management.
- aid: cloudkit:framework
  name: CloudKit Framework
  tags:
  - SDK
  - Apple Platforms
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.apple.com/documentation/cloudkit
  properties:
  - url: https://developer.apple.com/documentation/cloudkit
    type: Documentation
  description: The native CloudKit framework for iOS, iPadOS, macOS, tvOS, watchOS, and visionOS. Provides programmatic access
    to CloudKit containers, records, zones, subscriptions, and sharing. Out of band of the web services REST surface but shares
    the same data model.
- aid: cloudkit:cloudkit-assets-api
  name: Apple CloudKit Assets API
  description: The Assets API from Apple CloudKit — 2 operation(s) for assets.
  humanURL: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/index.html
  baseURL: https://api.apple-cloudkit.com/database/1
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - Assets
  properties:
  - type: OpenAPI
    url: openapi/cloudkit-assets-api-openapi.yml
  - type: Overlay
    url: overlays/cloudkit-assets-api-overlay.yaml
- aid: cloudkit:cloudkit-changes-api
  name: Apple CloudKit Changes API
  description: The Changes API from Apple CloudKit — 2 operation(s) for changes.
  humanURL: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/index.html
  baseURL: https://api.apple-cloudkit.com/database/1
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - Changes
  properties:
  - type: OpenAPI
    url: openapi/cloudkit-changes-api-openapi.yml
  - type: Overlay
    url: overlays/cloudkit-changes-api-overlay.yaml
- aid: cloudkit:cloudkit-records-api
  name: Apple CloudKit Records API
  description: The Records API from Apple CloudKit — 6 operation(s) for records.
  humanURL: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/index.html
  baseURL: https://api.apple-cloudkit.com/database/1
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - Records
  properties:
  - type: OpenAPI
    url: openapi/cloudkit-records-api-openapi.yml
  - type: Overlay
    url: overlays/cloudkit-records-api-overlay.yaml
- aid: cloudkit:cloudkit-subscriptions-api
  name: Apple CloudKit Subscriptions API
  description: The Subscriptions API from Apple CloudKit — 3 operation(s) for subscriptions.
  humanURL: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/index.html
  baseURL: https://api.apple-cloudkit.com/database/1
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - Subscription
  tags_raw:
  - Subscriptions
  properties:
  - type: OpenAPI
    url: openapi/cloudkit-subscriptions-api-openapi.yml
  - type: Overlay
    url: overlays/cloudkit-subscriptions-api-overlay.yaml
- aid: cloudkit:cloudkit-tokens-api
  name: Apple CloudKit Tokens API
  description: The Tokens API from Apple CloudKit — 2 operation(s) for tokens.
  humanURL: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/index.html
  baseURL: https://api.apple-cloudkit.com/database/1
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - Tokens
  properties:
  - type: OpenAPI
    url: openapi/cloudkit-tokens-api-openapi.yml
  - type: Overlay
    url: overlays/cloudkit-tokens-api-overlay.yaml
- aid: cloudkit:cloudkit-users-api
  name: Apple CloudKit Users API
  description: The Users API from Apple CloudKit — 4 operation(s) for users.
  humanURL: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/index.html
  baseURL: https://api.apple-cloudkit.com/database/1
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/cloudkit-users-api-openapi.yml
  - type: Overlay
    url: overlays/cloudkit-users-api-overlay.yaml
- aid: cloudkit:cloudkit-zones-api
  name: Apple CloudKit Zones API
  description: The Zones API from Apple CloudKit — 4 operation(s) for zones.
  humanURL: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/index.html
  baseURL: https://api.apple-cloudkit.com/database/1
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - Zones
  properties:
  - type: OpenAPI
    url: openapi/cloudkit-zones-api-openapi.yml
  - type: Overlay
    url: overlays/cloudkit-zones-api-overlay.yaml
common:
- type: AgenticAccess
  url: agentic-access/cloudkit-agentic-access.yml
- type: DomainSecurity
  url: security/cloudkit-domain-security.yml
- type: Authentication
  url: authentication/cloudkit-authentication.yml
- type: Website
  url: https://www.icloud.com/
- type: Documentation
  url: https://developer.apple.com/documentation/cloudkit
- type: Console
  url: https://icloud.developer.apple.com/dashboard/
- type: PrivacyPolicy
  url: https://www.apple.com/legal/privacy/
- type: JSONLD
  url: json-ld/cloudkit-context.jsonld
- type: Spectral
  url: rules/cloudkit-rules.yml
- type: Packages
  url: packages/cloudkit-packages.yml
- type: SDKs
  url: packages/cloudkit-packages.yml
- type: WellKnown
  url: well-known/cloudkit-well-known.yml
- type: SecurityTxt
  url: well-known/cloudkit-security.txt
- type: X-MCPServerCandidate
  url: mcp/cloudkit-mcp.yml
- type: LLMsTxt
  url: llms/cloudkit-llms.txt
- type: Conformance
  url: conformance/cloudkit-conformance.yml
- type: Compliance
  url: conformance/cloudkit-conformance.yml
- type: ErrorCatalog
  url: errors/cloudkit-problem-types.yml
- type: Lifecycle
  url: lifecycle/cloudkit-lifecycle.yml
- type: StatusPage
  url: lifecycle/cloudkit-lifecycle.yml
- type: VulnerabilityDisclosure
  url: security/cloudkit-vulnerability-disclosure.yml
- type: Security
  url: security/cloudkit-vulnerability-disclosure.yml
- type: TrustCenter
  url: security/cloudkit-trust-center.yml
- type: Sandbox
  url: sandbox/cloudkit-sandbox.yml
- type: Conventions
  url: conventions/cloudkit-conventions.yml
- type: ChangeLog
  url: changelog/cloudkit-changelog.yml
- type: CLI
  url: cli/cloudkit-cli.yml
- type: DataModel
  url: data-model/cloudkit-data-model.yml
- type: Plans
  url: plans/cloudkit-plans-pricing.yml
- type: RateLimits
  url: rate-limits/cloudkit-rate-limits.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DeveloperPortal
  url: https://developer.apple.com/icloud/cloudkit/
- type: APIReference
  url: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/index.html
- type: GettingStarted
  url: https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/SettingUpWebServices.html
- type: Support
  url: https://developer.apple.com/support/
- type: Blog
  url: https://developer.apple.com/news/
- type: GitHubOrganization
  url: https://github.com/apple
- type: Pricing
  url: https://developer.apple.com/programs/
- type: SignUp
  url: https://developer.apple.com/programs/enroll/
- type: TermsOfService
  url: https://www.apple.com/legal/internet-services/icloud/
maintainers:
- FN: Kin Lane
  email: kinlane@gmail.com
x-enrichment:
  date: '2026-09-05'
  status: enriched
  artifacts_added: 29
  pass: local-v3
x-parent: apple
x-relationship: product

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