Developers:Web services

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Learn how to access inventory data collected by OCS Inventory NG through the OCS Inventory NG SOAP Web Service.

Since version 1.0, OCS Inventory NG Server provides a Web Service usable through SOAP over HTTP. This Web Service is available from the OCS Inventory NG Communication Server through the URL "/ocsinterface".

Request types

The Web Service currently implements the following request types:


This function allows to query inventoried computers.

You must supply as parameter an XML structure described by the following DTD:

<?xml version="1.0" encoding="ISO-8859-1"?> 

ENGINE allows to select a search engine. Actually, only one search engine is available. So you must use <ENGINE>FIRST</ENGINE> (case insensitive).

BEGIN allows to navigate in results using an offset.

CHECKSUM allows to query computers for modified inventory sections. This is a 32 bits number in which each bit identifies an inventory section (inventory sections may be combined):

Bit 1 => Information about 'Hardware' (1 modified, 0 unchanged),
Bit 2 => Information about 'Bios' (1 modified, 0 unchanged),
Bit 3 => Information about 'Memory slots' (1 modified, 0 unchanged),
Bit 4 => Information about 'System slots' (1 modified, 0 unchanged),
Bit 5 => Information about 'Registry' (1 modified, 0 unchanged),
Bit 6 => Information about 'System controllers' (1 modified, 0 unchanged),
Bit 7 => Information about 'Monitors' (1 modified, 0 unchanged),
Bit 8 => Information about 'System ports' (1 modified, 0 unchanged),
Bit 9 => Information about 'Storage peripherals' (1 modified, 0 unchanged),
Bit 10 => Information about 'Logical drives' (1 modified, 0 unchanged),
Bit 11 => Information about 'Input devices' (1 modified, 0 unchanged),
Bit 12 => Information about 'Modems' (1 modified, 0 unchanged),
Bit 13 => Information about 'Network adapters' (1 modified, 0 unchanged),
Bit 14 => Information about 'Printers' (1 modified, 0 unchanged),
Bit 15 => Information about 'Sound adapters' (1 modified, 0 unchanged),
Bit 16 => Information about 'Video adapters' (1 modified, 0 unchanged),
Bit 17 => Information about 'Software' (1 modified, 0 unchanged)

WANTED is a 32 bits number like CHECKSUM, but for non-standard inventory sections:

Bit 1 => Information about ACCOUNTINFO (1 modified, 0 unchanged),
bit 2 => Information about DICO_SOFT (1 modified, 0 unchanged).

DICO_SOFT returns dictionary names of installed software. Here is the DTD:


Example: You want software from dictionary, but not all software listed in OCS.


ACCOUNT_INFO returns all administrative information. Here is the DTD:


The attribute "Name" of ENTRY contains the name of a piece of administrative information (TAG, for example), and value is marked up.

Example: You want all inventory section and accountinfo


The following other search criteria may be used besides of checksum:

  • ID may be multivalued, specifies a database ID of a computer.
  • TAG may be multivalued.
  • USERID may be multivalued, specifies a user logged on the computer when it was last inventoried.

ASKING_FOR allows to specify which answer is needed, META or INVENTORY.

In both cases, root is always <COMPUTERS/>, and every computer is marked up with <COMPUTER/>.


META are computers metadata:

<DEVICEID /> OCS computer unique ID => [hostname]-AAAA-MM-JJ-HH-MM-SS
<DATABASEID /> Database ID (hardware.ID ou *.HARDWARE_ID)
<CHECKSUM /> Checksum of last modified inventory sections
<LAST_COME /> Last contact of agent to Communication server
<LAST_DATE /> Last inventory date
<NAME /> Computer name
<TAG /> Computer TAG value

Here is the DTD of a computer inventory answer:

<?xml version="1.0" encoding="ISO-8859-1"?> 

Inventory is built from XML sections mapped to database tables (see Database Schema and OCS Inventory NG Server DTD).

ocs_config_V1(key, [value])

Returns configuration option value indicated in "key", and optionally set option to "value".

If second parameter is provided, answer must be this value if no error.


Returns a category for raw software name provided as parameter.

This method is not currently used.

get_history_V1(begin, num)

Returns events from deleted_equiv table (delete and duplicates management).

  • begin = offset
  • num = number of events

The answer is always sorted by date.

DTD is:



<DATE>2006-10-16 09:43:52</DATE> 
computer_à_toto-2005-06-09-09-36-41 became computer_à_toto-2006-08-17-11-37-35 on 2006-10-16 09:43:52.

clear_history_V1(begin, num)

Same as get_history_V1, but reset number of events asked.

You must test SOAP error "Fault" to ensure all is OK. Returns true otherwise.

reset_checksum_V1(checksum, IDs)

Set checksum for computers where list of IDs are provided in parameter.

Checksum must be value to set, not mask to compute! Returns true if OK, otherwise "Fault".

Sample client

Here is an example of a Perl script which invokes the Web Service:

#!/usr/bin/perl -s

use SOAP::Lite;
use XML::Entities;

# Parameters
# -s='' 			: server to query
# -u=''				: user to authenticate
# -pw=''			: user's password
# -params='...,...,...,...' 	: Method's args															 
# -proto='http|https'		: Transport protocol
# get_computers V1 secific parameters (enable you to easily modify XML values)
# -o=''				: offset value (to iterate if whome result is upper than OCS_OPT_WEB_SERVICE_RESULTS_LIMIT (see ocsinventory-server.conf)
# -c=''				: checksum to compare with
# -w=''				: same principle than checksum but for other sections (dico_soft and accountinfos for the moment)
# -t=''				: type (META || INVENTORY)) See web service documentation
# Checksum decimal values
#'hardware'      => 1,
#'bios'          => 2,
#'memories'      => 4,
#'slots'         => 8,
#'registry'      => 16,
#'controllers'   => 32,
#'monitors'      => 64,
#'ports'         => 128,
#'storages'      => 256,
#'drives'        => 512,
#'inputs'        => 1024,
#'modems'        => 2048,
#'networks'      => 4096,
#'printers'      => 8192,
#'sounds'        => 16384,
#'videos'        => 32768,
#'softwares'     => 65536

$s = $s||'localhost';
$u = $u||'';
$pw = $pw||'';
$proto = $proto||'http';
@params = split ',', $params;
$f = $f||get_computers_V1;

# You can modify some XML tags
$c = $c||131071;
$w=defined $w?$w:131071;

if( !defined(@params) && $f eq 'get_computers_V1' ){



print "Launching soap request to proxy:\n";
print "$proto://$u".($u?':':'').($u?"$pw\@":'')."$s/ocsinterface\n";

print "Function: <$f>\n";
$i++, print "Function Arg $i: `$_'\n" for @params;
print "\nIn progress... \n\n";

$lite = SOAP::Lite

  print "ERROR:\n\n",XML::Entities::decode( 'all', $lite->fault->{faultstring} ),"\nEND\n\n";
  my $i = 0;
  for( $lite->paramsall ){
    print "===== RESULT $i ===== \n".XML::Entities::decode( 'all', $_ )."\n";