> ## Documentation Index
> Fetch the complete documentation index at: https://stytch.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Get Session

> Retrieve session details using the Stytch Vanilla JS SDK

export const userTip = "Represents an end user's account in your application.";

export const isReact_0 = undefined

{isReact_0 &&
<Info>
  In React, use the <a href="../../hooks/use-stytch-session"><code>useStytchSession</code></a> hook to access the active Session and react to changes.
</Info>
}

The Stytch SDK caches the Session of the logged-in <Tooltip tip={userTip}>User</Tooltip>. `session.getSync` is a synchronous method that fetches the cached Session object.

If there is no cached data, this method returns `null`.

The `session.getInfo` method is similar to `session.getSync`, but returns an object containing the `session` object and a `fromCache` boolean. If `fromCache` is true, the session object is from the cache and a state refresh is in progress.

You can listen for changes with the `session.onChange` method, which invokes your callback whenever the Session object changes.

## Response

<ResponseField name="session_id" type="string">
  A unique identifier for a specific Session.
</ResponseField>

<ResponseField name="user_id" type="string">
  The unique ID of the affected User.
</ResponseField>

<ResponseField name="authentication_factors" type="array[objects]">
  An array of different authentication factors that comprise a Session.
</ResponseField>

<ResponseField name="started_at" type="string">
  The timestamp when the Session was created. Values conform to the RFC 3339 standard and are expressed in UTC, e.g. 2021-12-29T12:33:09Z.
</ResponseField>

<ResponseField name="last_accessed_at" type="string">
  The timestamp when the Session was last accessed. Values conform to the RFC 3339 standard and are expressed in UTC, e.g. 2021-12-29T12:33:09Z.
</ResponseField>

<ResponseField name="expires_at" type="string">
  The timestamp when the Session expires. Values conform to the RFC 3339 standard and are expressed in UTC, e.g. 2021-12-29T12:33:09Z.
</ResponseField>

<ResponseField name="attributes" type="object">
  Provided attributes help with fraud detection.

  <Expandable title="properties">
    <ResponseField name="ip_address" type="string">
      The IP address of the user.
    </ResponseField>

    <ResponseField name="user_agent" type="string">
      The user agent of the User.
    </ResponseField>
  </Expandable>
</ResponseField>

<ResponseField name="custom_claims" type="map">
  The custom claims map for a Session. Claims can be added to a session during a Sessions authenticate call.
</ResponseField>

<ResponseField name="roles" type="array[string]">
  A list of the roles associated with the session.
</ResponseField>

<Panel>
  <RequestExample>
    ```js theme={null}
    import { StytchClient } from '@stytch/vanilla-js';

    const stytch = new StytchClient('${publicToken}');
    const session = stytch.session.getSync();

    if (session) {
      console.log('Session ID:', session.session_id);
    }
    ```
  </RequestExample>
</Panel>