The following additional rules apply for any use of the X services or features listed below:

 

X login

You must present people with easy to find options to log into and out of X, for example via the OAuth protocol. The Sign in with X option must be displayed at least as prominently as any other sign-up or sign-in feature on your service. You must also provide people without a X account the opportunity to create one via X.

Once someone on your service authenticates via Sign in with X you must clearly display their X identity. X identity includes the person’s current X @handle, avatar, and X logo. Any display of someone’s X followers on your service must clearly show that the relationship is associated with X.

 

X Cards

To ensure a quality experience you must develop your Card to render across all platforms where Cards are displayed. Additional rules that you must follow when using Cards include:

  • You must mark your Post as ‘true’ for sensitive media if you plan to display such media within a Card

  • You must use HTTPS for hosting all assets within your Card. Your Card should never generate active mixed content browser warnings

  • Audio and video content should include stop or pause controls, and default to ‘sound off’ for videos that automatically play content

You may not exceed or circumvent X’s limitations placed on any Cards, including the Card’s intended use. Additional restrictions on Cards use include:

  • You may not place third-party sponsored content within Cards without X’s approval

  • You may not attach monetary incentives (including virtual currency) within your Card or on X from your Card

  • You may not include content or actions within your Card that are misleading or not contextually relevant, such as URLs and media

  • You may only attach an App Card to a Post when someone is explicitly promoting or referring to the app in the Post

 

Definitions

  1. X Content ‒ Posts, Post IDs, X end user profile information, and any other data and information made available to you through the X API or by any other means authorized by X, and any copies and derivative works thereof.

  2. Developer Site ‒ X’s developer site located at https://developer.x.com.

  3. Services ‒ Your websites, applications and other offerings that display X Content or otherwise use the Licensed Material as explicitly approved by X.

  4. Post ID ‒ A unique identification number generated for each Post.

  5. Post ‒ A posting made on X Applications.

  6. “X” ‒ Means (a) X Corp. (1355 Market Street, Suite 900, San Francisco, CA, 94103, USA) if your principal place of business is outside the European Union, EFTA States, and the United Kingdom; or (b) Twitter International Unlimited Company (One Cumberland Place, Fenian Street, Dublin 2, D02 AX07, Ireland) if your principal place of business is in the European Union, EFTA States, or the United Kingdom.

  7. Direct Message - A message  that is privately sent on X Applications by one end user to one or more specific end user(s) using X’s Direct Message function.

  8. X API ‒ The X Application Programming Interface (“API”), Software Development Kit (“SDK”) and/or the related documentation, data, code, and other materials provided by X with the API, as updated from time to time, including without limitation through the Developer Site.

  9. X Applications ‒ X’s consumer facing products, services, applications, websites, web pages, platforms, and other offerings, including without limitation, those offered via https://x.com and X's mobile applications.