# createSubject

This method is to create a new subject. Then you can associate the subject to a record when you call [createRecord](/cortex-api/records/createrecord.md).

*This method was added in Cortex 2.1*

## Parameters

| Name        | Type               | Required | Description                                                                                                               |
| ----------- | ------------------ | -------- | ------------------------------------------------------------------------------------------------------------------------- |
| cortexToken | `string`           | yes      | A token returned by [authorize](/cortex-api/authentication/authorize.md).                                                 |
| subjectName | `string`           | yes      | The name of the subject. Must be 30 characters or less.                                                                   |
| dateOfBirth | `string`           | no       | The date of birth of the subject. The format must be "YYYY-MM-DD", e.g. "1980-12-25".                                     |
| sex         | `string`           | no       | Must be "M", "F" or "U". These letters stands for male, female and unknown respectively.                                  |
| countryCode | `string`           | no       | The [Alpha-2 ISO code](https://en.wikipedia.org/wiki/List_of_ISO_3166_country_codes) of the country the subject lives in. |
| state       | `string`           | no       | The state the subject lives in.                                                                                           |
| city        | `string`           | no       | The city the subject lives in.                                                                                            |
| attributes  | `array of objects` | no       | A list of demographic attribute objects. See [Subject object](/cortex-api/subjects/subject-object.md).                    |

## Result

The result is a [subject object](/cortex-api/subjects/subject-object.md) representing the new subject.

## Examples

Create a subject with only his name.

{% tabs %}
{% tab title="Request" %}

```javascript
{
    "id": 1,
    "jsonrpc": "2.0",
    "method": "createSubject",
    "params": {
        "cortexToken": "xxx",
        "subjectName": "Bob Smith"
    }
}
```

{% endtab %}

{% tab title="Response" %}

```javascript
{
    "id": 1,
    "jsonrpc": "2.0",
    "result": {
        "attributes": [],
        "city": "",
        "countryCode": "",
        "countryName": "",
        "dateOfBirth": "",
        "experimentsCount": 0,
        "modifiedDatetime": "2019-07-01T11:41:25.270+07:00",
        "sex": "U",
        "state": "",
        "subjectName": "Bob Smith"
    }
}
```

{% endtab %}
{% endtabs %}

Create a subject with more information.

{% tabs %}
{% tab title="Request" %}

```javascript
{
    "id": 1,
    "jsonrpc": "2.0",
    "method": "createSubject",
    "params": {
        "cortexToken": "xxx",
        "subjectName": "Alice Smith",
        "city": "London",
        "countryCode": "GB",
        "dateOfBirth": "1980-12-25",
        "sex": "F",
        "attributes": [
            {
                "name": "Handedness",
                "value": "Left"
            },
            {
                "name": "Education",
                "value": "Master's degree"
            }
        ]
    }
}
```

{% endtab %}

{% tab title="Response" %}

```javascript
{
    "id": 1,
    "jsonrpc": "2.0",
    "result": {
        "attributes": [
            {
                "name": "Handedness",
                "value": "Left"
            },
            {
                "name": "Education",
                "value": "Master's degree"
            }
        ],
        "city": "London",
        "countryCode": "GB",
        "countryName": "",
        "dateOfBirth": "1980-12-25",
        "experimentsCount": 0,
        "modifiedDatetime": "2019-07-01T11:23:11.644+07:00",
        "sex": "F",
        "state": "",
        "subjectName": "Alice Smith"
    }
}
```

{% endtab %}
{% endtabs %}


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