> ## Documentation Index
> Fetch the complete documentation index at: https://x-preview-oauth-2-ios.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

export const Button = ({href, children}) => {
  return <div className="not-prose group">
    <a href={href}>
      <button className="flex items-center space-x-2.5 py-1 px-4 bg-primary-dark dark:bg-white text-white dark:text-gray-950 rounded-full group-hover:opacity-[0.9] font-medium">
        <span>
          {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>
    </a>
  </div>;
};

### Blocks lookup

The blocks lookup GET endpoint allows you to see which accounts you’ve blocked on behalf of an authorized user. This endpoint has a rate limit of 15 requests per 15 minutes per user. 

Since you are making requests for private information with blocks lookup, and on behalf of a user with manage blocks, you must authenticate these endpoints with either [OAuth 1.0a User Context](/resources/fundamentals/authentication) or [OAuth 2.0 Authorization Code with PKCE](resources/fundamentals/authentication#oauth-2-0-authorization-code-flow-with-pkce-2), and use the user Access Tokens associated with a user that has authorized your App, which can be generated using the [3-legged OAuth flow](/resources/fundamentals/authentication#obtaining-access-tokens-using-3-legged-oauth-flow) (OAuth 1.0a) or the [Authorization Code with PKCE grant flow](/resources/fundamentals/authentication#how-to-connect-to-endpoints-using-oauth-2-0-authorization-code-flow-with-pkce)) (OAuth 2.0).

<Note>
  **Account setup**

  To access these endpoints, you will need:

  * An approved [developer account](https://developer.x.com/en/portal/petition/essential/basic-info).
  * To authenticate using the keys and tokens from a [developer App](/resources/fundamentals/developer-apps) that is located within a [Project](/resources/fundamentals/projects). 

  Learn more about getting access to the X API v2 endpoints in our [getting started guide](/x-api/getting-started/getting-access).
</Note>

<div className="flex space-x-2">
  <Button href="/x-api/users/blocks/quickstart">
    Quick start
  </Button>

  <Button href="https://github.com/xdevplatform/Twitter-API-v2-sample-code">
    Sample code
  </Button>

  <Button href="https://app.getpostman.com/run-collection/9956214-784efcda-ed4c-4491-a4c0-a26470a67400">
    Run in Postman
  </Button>

  <Button href="https://developer.x.com/apitools/api?endpoint=/2/users/%7Bid%7D/blocking&method=get">
    Run in Postman
  </Button>
</div>