> ## 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.

# Discovery Authenticate

> Authenticate using discovery OAuth with the Stytch React SDK

export const ist = "A session token designed to preserve state when the user has completed an initial authentication step, but has not fully authenticated into an Organization.";

`oauth.$provider.discovery.authenticate()` wraps the [Authenticate Discovery OAuth](/docs/api-reference/b2b/api/oauth/discovery/authenticate) API endpoint which validates the OAuth token passed in. If this method succeeds, the <Tooltip tip={ist}>Intermediate Session</Tooltip> token will be stored in the browser as a cookie.

Use one of the following methods to authenticate a Discovery OAuth token:

* `oauth.google.discovery.authenticate()`
* `oauth.microsoft.discovery.authenticate()`
* `oauth.hubspot.discovery.authenticate()`
* `oauth.slack.discovery.authenticate()`
* `oauth.github.discovery.authenticate()`

### Parameters

<ParamField path="discovery_oauth_token" type="string" required>
  The Discovery OAuth token to authenticate.
</ParamField>

<Panel>
  <RequestExample>
    ```jsx theme={null}
    import { useEffect } from 'react';
    import { useSearchParams } from 'react-router';
    import { useStytchB2BClient } from '@stytch/react/b2b';

    export const DiscoveryAuthenticate = () => {
      const stytch = useStytchB2BClient();
      const [searchParams] = useSearchParams();

      useEffect(() => {
        const token = searchParams.get('token');
        if (token) {
          stytch.oauth.google.discovery.authenticate({
            discovery_oauth_token: token,
          });
        }
      }, [stytch, searchParams]);

      return <div>Authenticating...</div>;
    };
    ```
  </RequestExample>
</Panel>