# Item prototype object
The following objects are directly related to the `itemprototype` API.
### Item prototype
The item prototype object has the following properties.
|Property|Type|Description|
|--------|----|-----------|
|itemid|string|*(readonly)* ID of the item prototype.|
|**delay**
(required)|integer|Update interval of the item prototype in seconds.|
|**hostid**
(required)|string|ID of the host that the item prototype belongs to.|
|**interfaceid**
(required)|string|ID of the item prototype's host interface. Used only for host item prototypes.
Optional for Zabbix agent (active), Zabbix internal, Zabbix trapper, Zabbix aggregate, database monitor and calculated item prototypes.|
|**key\_**
(required)|string|Item prototype key.|
|**name**
(required)|string|Name of the item prototype.|
|**type**
(required)|integer|Type of the item prototype.
Possible values:
0 - Zabbix agent;
1 - SNMPv1 agent;
2 - Zabbix trapper;
3 - simple check;
4 - SNMPv2 agent;
5 - Zabbix internal;
6 - SNMPv3 agent;
7 - Zabbix agent (active);
8 - Zabbix aggregate;
10 - external check;
11 - database monitor;
12 - IPMI agent;
13 - SSH agent;
14 - TELNET agent;
15 - calculated;
16 - JMX agent;
17 - SNMP trap.|
|**value\_type**
(required)|integer|Type of information of the item prototype.
Possible values:
0 - numeric float;
1 - character;
2 - log;
3 - numeric unsigned;
4 - text.|
|authtype|integer|SSH authentication method. Used only by SSH agent item prototypes.
Possible values:
0 - *(default)* password;
1 - public key.|
|data\_type|integer|Data type of the item prototype.
Possible values:
0 - *(default)* decimal;
1 - octal;
2 - hexadecimal;
3 - boolean.|
|delay\_flex|string|[Custom intervals](/manual/config/items/item/custom_intervals) that contain flexible intervals and scheduling intervals as serialized strings.
Multiple intervals are separated by a semicolon.|
|delta|integer|Value that will be stored.
Possible values:
0 - *(default)* as is;
1 - Delta, speed per second;
2 - Delta, simple change.|
|description|string|Description of the item prototype.|
|formula|integer/float|Custom multiplier.
Default: 1.|
|history|integer|Number of days to keep item prototype's history data.
Default: 90.|
|ipmi\_sensor|string|IPMI sensor. Used only by IPMI item prototypes.|
|logtimefmt|string|Format of the time in log entries. Used only by log item prototypes.|
|multiplier|integer|Whether to use a custom multiplier.|
|params|string|Additional parameters depending on the type of the item prototype:
- executed script for SSH and Telnet item prototypes;
- SQL query for database monitor item prototypes;
- formula for calculated item prototypes.|
|password|string|Password for authentication. Used by simple check, SSH, Telnet, database monitor and JMX item prototypes.|
|port|string|Port monitored by the item prototype. Used only by SNMP items prototype.|
|privatekey|string|Name of the private key file.|
|publickey|string|Name of the public key file.|
|snmp\_community|string|SNMP community.
Used only by SNMPv1 and SNMPv2 item prototypes.|
|snmp\_oid|string|SNMP OID.|
|snmpv3\_authpassphrase|string|SNMPv3 auth passphrase. Used only by SNMPv3 item prototypes.|
|snmpv3\_authprotocol|integer|SNMPv3 authentication protocol. Used only by SNMPv3 items.
Possible values:
0 - *(default)* MD5;
1 - SHA.|
|snmpv3\_contextname|string|SNMPv3 context name. Used only by SNMPv3 item prototypes.|
|snmpv3\_privpassphrase|string|SNMPv3 priv passphrase. Used only by SNMPv3 item prototypes.|
|snmpv3\_privprotocol|integer|SNMPv3 privacy protocol. Used only by SNMPv3 items.
Possible values:
0 - *(default)* DES;
1 - AES.|
|snmpv3\_securitylevel|integer|SNMPv3 security level. Used only by SNMPv3 item prototypes.
Possible values:
0 - noAuthNoPriv;
1 - authNoPriv;
2 - authPriv.|
|snmpv3\_securityname|string|SNMPv3 security name. Used only by SNMPv3 item prototypes.|
|status|integer|Status of the item prototype.
Possible values:
0 - *(default)* enabled item prototype;
1 - disabled item prototype;
3 - unsupported item prototype.|
|templateid|string|(readonly) ID of the parent template item prototype.|
|trapper\_hosts|string|Allowed hosts. Used only by trapper item prototypes.|
|trends|integer|Number of days to keep item prototype's trends data.
Default: 365.|
|units|string|Value units.|
|username|string|Username for authentication. Used by simple check, SSH, Telnet, database monitor and JMX item prototypes.
Required by SSH and Telnet item prototypes.|
|valuemapid|string|ID of the associated value map.|