Integration Guide

Key concepts and best practices for integrating List lookup

This guide covers the key concepts you need to integrate the List lookup endpoints into your application.

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Authentication

List lookup endpoints support multiple authentication methods:

Method	Best for	Access to private Lists?
OAuth 2.0 App-Only	Public List data	No
OAuth 2.0 Authorization Code with PKCE	User-facing apps	Yes (owned/followed)
OAuth 1.0a User Context	Legacy integrations	Yes (owned/followed)

Example request

cURL

shellscript

curl "https://api.x.com/2/lists/84839422?\
list.fields=description,member_count,follower_count,private" \
  -H "Authorization: Bearer $BEARER_TOKEN"

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Endpoints overview

Method	Endpoint	Description
GET	/2/lists/:id	Get List by ID
GET	/2/users/:id/owned_lists	Get Lists owned by a user

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Fields and expansions

Default response

{
  "data": {
    "id": "84839422",
    "name": "Tech News"
  }
}

Available fields

list.fields

Field	Description
created_at	List creation timestamp
description	List description
follower_count	Number of followers
member_count	Number of members
owner_id	Owner’s user ID
private	Whether List is private

user.fields (requires owner_id expansion)

Field	Description
username	Owner’s @handle
name	Owner’s display name
verified	Owner’s verification status
profile_image_url	Owner’s avatar URL

Example with expansions

cURL

shellscript

curl "https://api.x.com/2/lists/84839422?\
list.fields=description,member_count,follower_count,owner_id&\
expansions=owner_id&\
user.fields=username,verified" \
  -H "Authorization: Bearer $BEARER_TOKEN"

Response with expansion

{
  "data": {
    "id": "84839422",
    "name": "Tech News",
    "description": "Top tech journalists",
    "member_count": 50,
    "follower_count": 1250,
    "owner_id": "2244994945"
  },
  "includes": {
    "users": [
      {
        "id": "2244994945",
        "username": "XDevelopers",
        "verified": true
      }
    ]
  }
}

Fields and expansions guide

Learn more about customizing responses

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Pagination

When retrieving owned Lists, results are paginated:

cURL

shellscript

# First request
curl "https://api.x.com/2/users/123/owned_lists?max_results=100" \
  -H "Authorization: Bearer $BEARER_TOKEN"

# Subsequent request with pagination token
curl "https://api.x.com/2/users/123/owned_lists?max_results=100&pagination_token=NEXT_TOKEN" \
  -H "Authorization: Bearer $BEARER_TOKEN"

Pagination guide

Learn more about pagination

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Private Lists

• Private Lists are only visible to the owner
• You must authenticate as the owner to retrieve private List details
• The private field indicates whether a List is private

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Error handling

Status	Error	Solution
400	Invalid request	Check List ID format
401	Unauthorized	Verify authentication
403	Forbidden	List may be private
404	Not Found	List doesn’t exist
429	Too Many Requests	Wait and retry

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Next steps

Quickstart

Make your first List lookup request

List Posts

Get Posts from a List

API Reference

Full endpoint documentation

Sample code

Working code examples