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openxcap - Fully featured XCAP server…  more info»



Copyright (c) 2007-2009 AG Projects

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Mircea Amarascu
Ruud Klaver
Lucian Stanescu
Denis Bilenko


OpenXCAP is an open source fully featured XCAP server. An XCAP server is
used by SIP SIMPLE clients and servers to manage buddy lists and policy for
subscriptions to presence or other types of events published using SIP
protocol. OpenXCAP server works out of the box with OpenSIPS Presence Agent.

The software is licensed according to the GNU General Public License version
2. For other licensing options please contact


XCAP protocol allows a client to read, write, and modify application
configuration data stored in XML format on a server. XCAP maps XML document
sub-trees and element attributes to HTTP URIs, so that these components can
be directly accessed by clients using HTTP protocol. An XCAP server is used
by XCAP clients to store data like buddy lists and presence policy in
combination with a SIP Presence server that supports PUBLISH, SUBSCRIBE and
NOTIFY methods to provide a complete SIP SIMPLE server solution.


The server is written in Python programming language and implements the
following standards: 

RFC4825, RFC4826, RFC4827, RFC5025, draft-ietf-simple-xcap-diff-09.txt

 * Suport for multiple domains
 * Full and partial XML document manipulation
 * XML schema validation
 * Supports multiple back-end storage systems
 * Works out of the box with OpenSIPS Presence agent
 * TLS encryption and digital certificates using GnuTLS library
 * Digest or basic HTTP authentication with support for multiple realms
 * Database passwords can be stored in an encrypted format

Supported XCAP applications

 * XCAP capabilities (auid = xcap-caps). Lists the capabilities of the
   OpenXCAP server.
 * Resource lists (auid = resource-lists). A resource lists application is
   any application that needs access to a list of resources, identified by a
   URI, to which operations, such as subscriptions, can be applied.
 * Presence rules (auid = pres-rules, org.openmobilealliance.pres-rules). A
   Presence Rules application is an application which uses authorization
   policies, also known as authorization rules, to specify what presence
   information can be given to which watchers, and when.
 * RLS services (auid = rls-services). A Resource List Server (RLS) services
   application is Session Initiation Protocol (SIP) application whereby a
   server receives SIP SUBSCRIBE requests for resource, and generates
   subscriptions towards the resource list. See the README file for more
   details about of the implementation.
 * PIDF manipulation (auid = pidf-manipulation). Pidf-manipulation
   application usage defines how XCAP is used to manipulate the contents of
   PIDF based presence documents.
 * Watchers (auid = watchers, proprietary application). This application
   returns the list of watchers from OpenSIPS presence agent.


See INSTALL file.


The project is developed and supported by AG Projects via the wiki
collaboration system provided at

To open ticket please Register first. The ticketing support system is
available only for registered users. Please beware that the support is
provided by the community on a best-effort basis.

For help on the integration between OpenXCAP and OpenSIPS you may consult
the mailing list The mailing list archive is
available at:

Commercial support

The software is supported commercially by AG Projects

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