# Primary Domains

### Primary domains <a href="#primary-domains" id="primary-domains"></a>

This endpoint can be used to retrieve the primary domains of a list of user public keys. You may include up to 20 public keys in a comma separated list. Results are cached, and refreshed every 5 minutes. If you're integrating SNS into your dApp, we strongly recommend using primary domains since users have selected these domains specifically to represent their identities apart from other domains they may own.

{% hint style="info" %}
Primary domains used to be called favorite domains.
{% endhint %}

> Request

```
GET /v2/user/fav-domains/{pubkeys}
```

> Response

```json
{
  "FMmaHPDL47V1gXsfh9WjgAT7Er3dfDvarQubTU1Jxc1r": "best-intern",
  "3f9fRjLaDSDVxd26xMEm4WuSXv62cGt5qVfEVGwMfTz6": "11441"
}
```


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.sns.id/dev/sns-api/primary-domains.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.