# Calendar API for integrated scheduling applications

Calendar APIs for connecting with Google, Microsoft, Apple, Outlook and more. Start building customized scheduling applications with our unified Calendar API today.

## Integrate the most reliable real-time calendar sync API

The Cronofy calendar API is the choice of SaaS applications who care about reliability and performance at scale. Connect with Google, Microsoft and Apple calendars, even on-premise Exchange, with a 99.99% service guarantee.

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> Cronofy's Calendar Sync is now a crucial part of our application; it saves us substantial development time and helps us offer a superior product.

— Tom Luce, CTO and Co-founder, Pinpoint

Unified Calendar API

## Integrate your customers' calendars with one API

A mature series of API end-points optimized for calendar sync operations. Connecting your app to Google, Microsoft and Apple calendar services as well as on-premise Exchange. 

No need to setup up credentials or go through security reviews for each service. Cronofy just works for you out of the box.

Your users authorize access through an authorization flow, branded for your application, which allows you to limit the data that you need. 

Just want free busy access but still want to create events, we've got you covered.

[Explore the calendar & events docs](https://docs.cronofy.com/developers/calendars-events/)

Webhooks

## Keep in sync with real-time push notifications

Tracking real-time changes is crucial to driving application workflows. Cronofy's sync engine continuously monitors your users' calendars and notifies your application based on the rules that you specify.

Because we track events your application creates separately to events that the user create in their calendar, you can just be notified about what is important.

[Read the push notification docs](https://docs.cronofy.com/developers/push-notifications/)

Integrated Conferencing 

## Add conferencing to any of your calendar events

Automatically generate unique conferencing links for calendar events. Cronofy automatically supports integrated conferencing like Google Meet and Microsoft Teams. 

You can also allow your users to authorize access to their Zoom, GoTo and Webex accounts, enabling you to use them in the same way. 

Cronofy manages the different connections and APIs, you focus on delivering what's important for your users.

[Read the conferencing docs](https://docs.cronofy.com/developers/conferencing-services/)

UI Elements

## Embed real-time slot selection UI

Embed a customizable and intuitive calendar interface into your application. Present combined availability of your team or users and offer time slot selection to customers. Support multiple timezones and languages.

[Date time picker UI element](https://docs.cronofy.com/developers/ui-elements/date-time-picker/)

Bulk Onboarding

## Automatically onboard users with Enterprise Connect

Fast track your app onboarding with Enterprise Connect, our authorization scheme for your enterprise customers. A single approval from a domain admin allows your application to onboard calendars automatically. Without your users having to do anything. 

This also gives you access to meeting rooms and resources for organizing on-site meetings. 

[Read the Enterprise Connect docs](https://docs.cronofy.com/developers/authorization/enterprise-connect/)

Calendar Access Modes

## Choose the right level of calendar access

Cronofy supports multiple calendar access modes, including Free/Busy-only connections for privacy-sensitive and enterprise environments. 

This allows your application to check availability and power scheduling without accessing event titles, descriptions, or attendee details, reducing adoption friction and supporting stricter internal policies. 

[Read the Calendar Access Modes docs](https://docs.cronofy.com/developers/authorization/access-modes/)

> Clients around the world entrust their data to Iron Mountain. Ensuring that their information – as well as our employees’ calendar data – was secure was a critical part of our work with Cronofy. Thanks to their Enterprise Connect feature we were also able to onboard all of our inside sales teams in one go.

— Kevin Fitzgerald, VP Inside Sales, Iron Mountain

Start building with the most reliable calendar API

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[Speak to a specialist](/book-a-demo-api)