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# itemprototype.update

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### Description

`object itemprototype.update(object/array itemPrototypes)`

This method allows to update existing item prototypes.

::: noteclassic
This method is only available to *Admin* and *Super admin*
user types. Permissions to call the method can be revoked in user role
settings. See [User
roles](/manual/web_interface/frontend_sections/users/user_roles)
for more information.
:::

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### Parameters

`(object/array)` Item prototype properties to be updated.

The `itemid` property must be defined for each item prototype, all other
properties are optional. Only the passed properties will be updated, all
others will remain unchanged.

Additionally to the [standard item prototype
properties](object#item-prototype), the method accepts the following
parameters.

|Parameter|[Type](/manual/api/reference_commentary#data-types)|Description|
|--|--|------|
|preprocessing|array|[Item prototype preprocessing](/manual/api/reference/itemprototype/object#item-prototype-preprocessing) options to replace the current preprocessing options.<br><br>[Parameter behavior](/manual/api/reference_commentary#parameter-behavior):<br>- *read-only* for inherited objects|
|tags|array|[Item prototype tags](/manual/api/reference/itemprototype/object#item-prototype-tag).|

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### Return values

`(object)` Returns an object containing the IDs of the updated item
prototypes under the `itemids` property.

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### Examples

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#### Changing the interface of an item prototype

Change the host interface that will be used by discovered items.

[Request](/manual/api#performing-requests):

```json
{
    "jsonrpc": "2.0",
    "method": "itemprototype.update",
    "params": {
        "itemid": "27428",
        "interfaceid": "132"
    },
    "id": 1
}
```

Response:

```json
{
    "jsonrpc": "2.0",
    "result": {
        "itemids": [
            "27428"
        ]
    },
    "id": 1
}
```

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#### Update dependent item prototype

Update Dependent item prototype with new Master item prototype ID. Only
dependencies on same host (template/discovery rule) are allowed,
therefore Master and Dependent item should have same hostid and ruleid.

[Request](/manual/api#performing-requests):

```json
{
    "jsonrpc": "2.0",
    "method": "itemprototype.update",
    "params": {
        "master_itemid": "25570",
        "itemid": "189030"
    },
    "id": 1
}
```

Response:

```json
{
    "jsonrpc": "2.0",
    "result": {
        "itemids": [
            "189030"
        ]
    },
    "id": 1
}
```

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#### Update HTTP agent item prototype

Change query fields and remove all custom headers.

[Request](/manual/api#performing-requests):

```json
{
    "jsonrpc": "2.0",
    "method": "itemprototype.update",
    "params": {
        "itemid":"28305",
        "query_fields": [
            {
                "name": "random",
                "value": "qwertyuiopasdfghjklzxcvbnm"
            }
        ],
        "headers": []
    }
    "id": 1
}
```

Response:

```json
{
    "jsonrpc": "2.0",
    "result": {
        "itemids": [
            "28305"
        ]
    },
    "id": 1
}
```

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#### Updating item preprocessing options

Update an item prototype with item preprocessing rule "Custom multiplier".

[Request](/manual/api#performing-requests):

```json
{
    "jsonrpc": "2.0",
    "method": "itemprototype.update",
    "params": {
        "itemid": "44211",
        "preprocessing": [
            {
                "type": 1,
                "params": "4",
                "error_handler": 2,
                "error_handler_params": "5"
            }
        ]
    },
    "id": 1
}
```

Response:

```json
{
    "jsonrpc": "2.0",
    "result": {
        "itemids": [
            "44211"
        ]
    },
    "id": 1
}
```

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#### Updating a script item prototype

Update a script item prototype with a different script and remove
unnecessary parameters that were used by previous script.

[Request](/manual/api#performing-requests):

```json
{
    "jsonrpc": "2.0",
    "method": "itemprototype.update",
    "params": {
        "itemid": "23865",
        "parameters": [],
        "script": "Zabbix.log(3, 'Log test');\nreturn 1;"
    },
    "id": 1
}
```

Response:

```json
{
    "jsonrpc": "2.0",
    "result": {
        "itemids": [
            "23865"
        ]
    },
    "id": 1
}
```

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### Source

CItemPrototype::update() in
*ui/include/classes/api/services/CItemPrototype.php*.

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