> ## Documentation Index
> Fetch the complete documentation index at: https://x-preview-mintlify-9523e74a.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Migration guide

> The block and unblock users endpoints are only available under the Enterprise plan. Reference for the Enterprise X API tier covering blocks.

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    <a href={href}>
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          {children}
        </span>
        <svg width="3" height="24" viewBox="0 -9 3 24" class="h-6 rotate-0 overflow-visible"><path d="M0 0L3 3L0 6" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round"></path></svg>
      </button>
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};

<Callout icon="key" color="#22C55E" iconType="regular">
  The block and unblock users endpoints are only available under the Enterprise plan. You can fill out the Enterprise interest form [here](/forms/enterprise-api-interest).
</Callout>

### Blocks lookup: Standard v1.1 compared to X API v2

If you have been working with the standard v1.1 [GET blocks/ids](https://developer.x.com/en/docs/twitter-api/v1/accounts-and-users/mute-block-report-users/api-reference/get-blocks-ids) and [GET blocks/list](https://developer.x.com/en/docs/twitter-api/v1/accounts-and-users/mute-block-report-users/api-reference/get-blocks-list) endpoints, the goal of this guide is to help you understand the similarities and differences between the standard v1.1 and X API v2 blocks lookup endpoints.

* **Similarities**
  * Authentication
* **Differences**
  * Endpoint URLs

  * Users per request limits

  * App and Project requirements

  * Response data formats

  * Request parameters

#### Similarities

**Authentication**

Both the standard v1.1 and X API v2 blocks lookup endpoints use [OAuth 1.0a User Context](/resources/fundamentals/authentication#oauth-1-0a-2). Therefore, if you were previously using one of the standard v1.1 blocks lookup endpoints, you can continue using the same authentication method if you migrate to the X API v2 version. 

#### Differences

**Endpoint URLs**

* Standard v1.1 endpoints:
  * GET [https://api.x.com/1.1/blocks/ids.json](https://api.x.com/1.1/blocks/ids.json)
    (list of user IDs who are blocked by the specified user)
  * GET [https://api.x.com/1.1/blocks/lists.json](https://api.x.com/1.1/blocks/lists.json)
    (list of users who are blocked by the specified user)
* X API v2 endpoint:
  * GET [https://api.x.com/2/users/:id/blocking](https://api.x.com/2/users/:id/blocking)
    (list of users who are blocked by the specified user ID)