| Description | Standard v1.1 | X API v2 |
| HTTP methods supported | GET | GET |
| Host domain | https://api.x.com | https://api.x.com |
| Endpoint path | /1.1/users/show.json /1.1/users/lookup.json | /2/users
/2/users/:id
/2/users/by
/2/users/by/:username |
| Authentication | OAuth 1.0a User Context | OAuth 1.0a User Context
App only
OAuth 2.0 Authorization Code with PKCE |
| Default request rate limits | 900 requests per 15 min (per user)
/show - 900 requests per 15 min (per app)
/lookup - 300 requests per 15 min (per app) | 900 requests per 15 min (per user)
300 requests per 15 min (per app) |
| Maximum Users per response | /show - 1
/lookup - 100 | 100 |
| JSON response object format | Standard v1.1 format | X API v2 format (determined by fields and expansions request parameters, not backward-compatible with v1.1 formats)
To learn more about how to migrate from the Standard v1.1 format to the X API v2 format, please visit our data formats migration guide. |
| Supports selecting which fields return in the payload | | ✔ |
| Supports the annotations fields (on pinned Post) | | ✔ |
| Supports requesting new metrics fields (on pinned Post) | | ✔ |
| Supports the conversation_id field (on pinned Post) | | ✔ |
| Requires the use of credentials from a developer App associated with a project | | ✔ |
