Calendar

CalDAV API

Any CalDAV server, including iCloud and self-hosted

Connect CalDAVRead the quickstart

CalDAV

Calendar

How an account links

  • CalDAV/CardDAV
  • calendarCalendars · Events · Availability3
  • platformWebhooks1

What Aux0 does with CalDAV

Any CalDAV server, including iCloud and self-hosted

The same calendar endpoints against any CalDAV server. Covers iCloud Calendar, Fastmail, Nextcloud and anything else that speaks the protocol.

Calendar

  • CalendarsList the calendars the account can read or write.GET /v1/calendars
  • EventsCreate, update, move and cancel events, with attendees.POST /v1/calendars/:id/events
  • AvailabilityRead free/busy across calendars to offer meeting slots.POST /v1/calendars/availability

Platform

  • WebhooksSigned delivery of every event, with replay and a dead letter queue.POST /v1/webhooks

How an account is linked

CalDAV/CardDAV

Whichever method a provider uses, your users complete it on a page Aux0 serves under your branding. You receive an account id and a webhook; no password, QR scan or one-time code ever reaches your product. How hosted auth works.

What it is bought for

Calendars outside Google and Microsoft

Self-hosted and on-premise calendars

What you should know first

The constraints, before you commit

These are the provider's rules, not ours. We would rather you read them now than discover one in production.

Free/busy precision depends on what the server publishes.

Next

Google Calendar

Read availability and book meetings from your own product

iCloud

iCloud Mail, Calendar and Contacts with an app-specific password

CardDAV

Any CardDAV server, including iCloud and self-hosted

Connect CalDAV on the free plan

One connected account, every provider, forever. It is enough to build the whole integration before you pay for anything.

Start buildingHow Aux0 connects accounts