This web site describes the CardDAV protocol, and includes details about the protocol, related standards, CardDAV products and other related information. It is kindly being hosted by The Calendaring and Scheduling Consortium.

CardDAV is an address book client/server protocol designed to allow users to access and share contact data on a server.

The CardDAV protocol has been standardized by the IETF and published as RFC 6352.

A new version of vCard (vCard 4) has been published by the IETF as RFC 6350, and the XML Representation of vCard (xCard) as RFC 6351.

For more information on what is available on the Developers Guide please see the Table of Contents.

For information on CardDAV implementations see:

  1. Clients
  2. Servers
  3. Libraries and tools
  4. Service providers

See Standards for further information on standards you need to be aware of.

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