> ## Documentation Index
> Fetch the complete documentation index at: https://x-preview-mintlify-0fcdedf2.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# List members lookup

> If you have been working with the standard v1.1 GET lists/members and GET lists/memberships. Reference for the X API v2 standard tier covering migrate.

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};

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

If you have been working with the standard v1.1 [GET lists/members](https://developer.x.com/en/docs/twitter-api/v1/accounts-and-users/create-manage-lists/api-reference/get-lists-members) and [GET lists/memberships](https://developer.x.com/en/docs/twitter-api/v1/accounts-and-users/create-manage-lists/api-reference/get-lists-memberships) endpoints, the goal of this guide is to help you understand the similarities and differences between the standard v1.1 and X API v2 List member endpoints.

* **Similarities**
  * Authentication methods
* **Differences**
  * Endpoint URLs
  * Rate limits
  * App and Project requirements
  * Data objects per request limits
  * Response data formats
  * Request parameters

#### Similarities

**Authentication**

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

Depending on your authentication library/package of choice, App only authentication is probably the easiest way to get started and can be set with a simple request header. To learn how to generate an App only Access Token, see [this App only guide](/resources/fundamentals/authentication#bearer-token-also-known-as-app-only).

#### Differences

**Endpoint URLs**

* Standard v1.1 endpoints:
  * GET [https://api.x.com/1.1/lists/members.json](https://api.x.com/1.1/lists/members.json)
    (Lookup members of a specified List)
  * GET [https://api.x.com/1.1/lists/mem](https://api.x.com/1.1/lists/mem)