# Overview

You can choose which Tolokers will have access to pool tasks. For example, you can select Tolokers by region, skill, or type of browser (desktop or mobile).

To set up Toloker filtering for a pool, add the filter JSON object to the pool. A sample filter in JSON with a parameter description is shown below.

Note

The JSON filter description must not exceed 10,000 characters.

## Sample filter in JSON

This example selects Tolokers from Russia and Ukraine for completing tasks (it uses the region detected from the Toloker's IP address and the country specified in the profile). Users must have a minimum skill level of 60 for the control page results.

{
"filter" : {
"and":[
{
"or":[
{
"category":"computed",
"key":"region_by_ip",
"operator":"IN",
"value":225
},
{
"category":"computed",
"key":"region_by_ip",
"operator":"IN",
"value":187
}
]
},
{
"category":"profile",
"key":"country",
"operator":"EQ",
"value":"RU"
},
{
"category":"skill",
"key":"2",
"operator":"GTE",
"value":"60"
}
]
}
}


## Parameters

Note

The and and or parameters must be lowercase.

 Parameter Overview category string | mandatory Group of data for filtering: skill — The skill. profile — Profile data. computed — Computed data, such as the Toloker's region according to the IP address. key string | mandatory Attribute to use for filtering Tolokers. For example, the country (country), or a skill (specify the skill ID). operator string | mandatory Comparison operator in the condition. For example, the condition "Toloker must be 18 or older" uses the date of birth and the GTE ("Greater than or equal to") operator. Possible values for the operator key depend on the type of data in the value field. To choose the correct value, see the descriptions of filters in the sections Filter by profile data, Filter by calculated data, Filter by skills. Note The operator value must be lowercase. value boolean, string, list of strings, integer | mandatory The value of the attribute from the key field. For example, the ID of the region specified in the profile, or the minimum skill value. To choose the correct value, see the descriptions of filters in the sections Filter by profile data, Filter by calculated data, Filter by skills.