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

# Connect Bullhorn with OAuth 2.0 (Password Grant) – StackOne Hub

> Link a Bullhorn account in the StackOne Hub using OAuth 2.0 (Password Grant). End-user guide to authorize the integration and start using Bullhorn actions.

> [!WARNING]
>
> You must have access to a Bullhorn ATS account with API permissions to complete this setup.

## Providing the API user credentials

This method requires the API user's username and password (the Username and Password fields).\
\
*Note:* The API user must be API-enabled and must not sign in via SSO or MFA. Avoid signing in to the Bullhorn application with this user.

## Find your authorization and REST URLs

Bullhorn uses different data centers with unique URLs. Call the loginInfo endpoint with your API username to find yours: `GET https://rest.bullhornstaffing.com/rest-services/loginInfo?username=<your-api-username>`

<ul>
  <li>**Authorization Server URL**: the `oauthUrl` in the response, base URL only</li>
  <li>Format: `https://{auth-host}.bullhornstaffing.com`</li>
  <li>Example: `https://auth-emea.bullhornstaffing.com`</li>
  <li>**REST API URL**: the `restUrl` in the response, base URL only</li>
  <li>Format: `https://{rest-host}.bullhornstaffing.com`</li>
  <li>Example: `https://rest-emea.bullhornstaffing.com`</li>
</ul>

## Link the Account

**1. Connect**

<ul>
  <li>Click **Connect**.</li>
  <li>If applicable, the provider will redirect you to a sign-in or authorization page. Complete the provider's authorization flow.</li>
  <li>Once authorization is successful, you will see a confirmation popup.</li>
</ul>

**2. Use Actions**

Connect an AI platform to the linked account's actions. See [AI Platforms](https://docs.stackone.com/connect/ai-platforms/overview.md).

Other ways to call actions are listed in [Protocols & SDKs](https://docs.stackone.com/connect/protocols-and-sdks.md).


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