Contacts

CardDAV API

Any CardDAV server, including iCloud and self-hosted

Connect CardDAVRead the quickstart

CardDAV

Contacts

How an account links

  • CalDAV/CardDAV
  • contactsContacts · Contact search · Write contacts3
  • platformWebhooks1

What Aux0 does with CardDAV

Any CardDAV server, including iCloud and self-hosted

The same contact endpoints against any CardDAV server, covering iCloud Contacts, Fastmail and self-hosted address books.

Contacts

  • ContactsPage through the contacts on the account, with addresses and phones.GET /v1/contacts
  • Contact searchLook up a contact by name or address, for autocomplete.GET /v1/contacts/search
  • Write contactsCreate and update contacts on the connected account.POST /v1/contacts

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

Address books outside Google and Microsoft

Next

CalDAV

Any CalDAV server, including iCloud and self-hosted

iCloud

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

Google Contacts

Contacts and autocomplete from a connected Google account

Connect CardDAV 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