Cronofy website screenshot

Cronofy

Cronofy is a scheduling and calendar API platform that provides a unified interface to Google Calendar, Microsoft 365 / Outlook, Exchange, and Apple iCloud. Its REST API powers two-way calendar sync, real-time availability and scheduling, smart invites, scheduling links, and push notifications for software teams embedding scheduling into their products.

Cronofy publishes 5 APIs on the APIs.io network, including Availability API, Calendars API, Events API, and 2 more. Tagged areas include Scheduling, Calendar, Availability, Booking, and Productivity.

Cronofy’s developer surface includes authentication, documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
40.1/100 developing ▬ flat Agent 20/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
AccessPaid
1 APIs
SchedulingCalendarAvailabilityBookingProductivity

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 40.1/100 · developing
Contract Quality 12.9 / 23
Developer Ergonomics 5.8 / 18
Access Clarity 7.1 / 18
Operational Transparency 2.8 / 12
Contract Governance 0.0 / 11
Discoverability 6.2 / 9
Create-or-Update Ergonomics 2.2 / 10
Agent readiness — 20/100 · 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 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 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/cronofy: 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 5

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

Cronofy Availability API

Availability queries and hosted real-time scheduling.

Cronofy Calendars API

Connected calendars, application calendars, and account identity.

Cronofy Events API

Reading, creating, updating, and deleting events plus free/busy.

Cronofy Push Notifications API

Notification channels for real-time calendar changes.

Cronofy Smart Invites API

Calendar invites tracked without calendar authorization.

Open Collections 7

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

API Collection

OPEN COLLECTION

Cronofy Availability API

OPEN COLLECTION

Cronofy Availability Calendars API

OPEN COLLECTION

Cronofy Availability Events API

OPEN COLLECTION

Cronofy Availability Push Notifications API

OPEN COLLECTION

Cronofy Availability Smart Invites API

OPEN COLLECTION

Cronofy API

OPEN COLLECTION

Scroll for all 7

Pricing Plans 1

Published pricing tiers and plan structures.

Cronofy Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Cronofy Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Cronofy Finops

FINOPS

Security Posture 2

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

Cronofy Authentication

http · 1 scheme

SECURITY

Cronofy Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Cronofy Agentic Access

16 operations · 10 acting

16 operations · 10 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: cronofy
url: https://raw.githubusercontent.com/api-evangelist/cronofy/refs/heads/main/apis.yml
name: Cronofy
kind: company
description: Cronofy is a scheduling and calendar API platform that provides a unified interface to Google Calendar, Microsoft
  365 / Outlook, Exchange, and Apple iCloud. Its REST API powers two-way calendar sync, real-time availability and scheduling,
  smart invites, scheduling links, and push notifications for software teams embedding scheduling into their products.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/cronofy.png
tags:
- Scheduling
- Calendar
- Availability
- Booking
- Productivity
created: '2026-06-21'
modified: '2026-06-21'
specificationVersion: '0.23'
apis:
- aid: cronofy:cronofy-availability-api
  name: Cronofy Availability API
  description: Availability queries and hosted real-time scheduling.
  humanURL: https://docs.cronofy.com/developers/api/calendars/
  baseURL: https://api.cronofy.com/v1
  tags:
  - Availability
  properties:
  - type: OpenAPI
    url: openapi/cronofy-availability-api-openapi.yml
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/calendars/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/
  - type: PostmanCollection
    url: collections/cronofy.postman_collection.json
  - type: OpenCollection
    url: collections/cronofy.opencollection.json
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/events/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/events/free-busy/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/scheduling/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/scheduling/availability/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/smart-invites/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/smart-invites/create-smart-invite/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/scheduling/real-time-scheduling/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/scheduling/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/push-notifications/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/push-notifications/create-channel/
- aid: cronofy:cronofy-calendars-api
  name: Cronofy Calendars API
  description: Connected calendars, application calendars, and account identity.
  humanURL: https://docs.cronofy.com/developers/api/calendars/
  baseURL: https://api.cronofy.com/v1
  tags:
  - Calendars
  properties:
  - type: OpenAPI
    url: openapi/cronofy-calendars-api-openapi.yml
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/calendars/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/
  - type: PostmanCollection
    url: collections/cronofy.postman_collection.json
  - type: OpenCollection
    url: collections/cronofy.opencollection.json
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/events/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/events/free-busy/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/scheduling/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/scheduling/availability/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/smart-invites/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/smart-invites/create-smart-invite/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/scheduling/real-time-scheduling/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/scheduling/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/push-notifications/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/push-notifications/create-channel/
- aid: cronofy:cronofy-events-api
  name: Cronofy Events API
  description: Reading, creating, updating, and deleting events plus free/busy.
  humanURL: https://docs.cronofy.com/developers/api/calendars/
  baseURL: https://api.cronofy.com/v1
  tags:
  - Event
  tags_raw:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/cronofy-events-api-openapi.yml
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/calendars/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/
  - type: PostmanCollection
    url: collections/cronofy.postman_collection.json
  - type: OpenCollection
    url: collections/cronofy.opencollection.json
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/events/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/events/free-busy/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/scheduling/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/scheduling/availability/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/smart-invites/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/smart-invites/create-smart-invite/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/scheduling/real-time-scheduling/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/scheduling/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/push-notifications/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/push-notifications/create-channel/
- aid: cronofy:cronofy-push-notifications-api
  name: Cronofy Push Notifications API
  description: Notification channels for real-time calendar changes.
  humanURL: https://docs.cronofy.com/developers/api/calendars/
  baseURL: https://api.cronofy.com/v1
  tags:
  - Push Notifications
  properties:
  - type: OpenAPI
    url: openapi/cronofy-push-notifications-api-openapi.yml
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/calendars/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/
  - type: PostmanCollection
    url: collections/cronofy.postman_collection.json
  - type: OpenCollection
    url: collections/cronofy.opencollection.json
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/events/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/events/free-busy/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/scheduling/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/scheduling/availability/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/smart-invites/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/smart-invites/create-smart-invite/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/scheduling/real-time-scheduling/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/scheduling/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/push-notifications/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/push-notifications/create-channel/
- aid: cronofy:cronofy-smart-invites-api
  name: Cronofy Smart Invites API
  description: Calendar invites tracked without calendar authorization.
  humanURL: https://docs.cronofy.com/developers/api/calendars/
  baseURL: https://api.cronofy.com/v1
  tags:
  - Smart Invites
  properties:
  - type: OpenAPI
    url: openapi/cronofy-smart-invites-api-openapi.yml
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/calendars/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/
  - type: PostmanCollection
    url: collections/cronofy.postman_collection.json
  - type: OpenCollection
    url: collections/cronofy.opencollection.json
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/events/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/events/free-busy/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/scheduling/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/scheduling/availability/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/smart-invites/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/smart-invites/create-smart-invite/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/scheduling/real-time-scheduling/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/scheduling/
  - type: Documentation
    url: https://docs.cronofy.com/developers/api/push-notifications/
  - type: APIReference
    url: https://docs.cronofy.com/developers/api/push-notifications/create-channel/
common:
- type: AgenticAccess
  url: agentic-access/cronofy-agentic-access.yml
- type: DomainSecurity
  url: security/cronofy-domain-security.yml
- type: Authentication
  url: authentication/cronofy-authentication.yml
- type: GitHubOrganization
  url: https://github.com/cronofy
- type: LinkedIn
  url: https://www.linkedin.com/company/cronofy
- type: Website
  url: https://www.cronofy.com
- type: Documentation
  url: https://docs.cronofy.com/developers/
- type: Plans
  url: plans/cronofy-plans-pricing.yml
- type: RateLimits
  url: rate-limits/cronofy-rate-limits.yml
- type: FinOps
  url: finops/cronofy-finops.yml
- url: https://www.cronofy.com/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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