X

X operates the official developer platform for the eponymous short-message service and publishes two separate MCP offerings: X Ads MCP for programmatically managing advertising campaigns, and X API MCP for general access to posts, user data, and trends. The platform positions itself around the promise to "build, analyze, and innovate with X's real-time global data."

The API covers multiple data types, including posts, user profiles, Spaces, direct messages, and lists, available through both standard pay-per-use access and enterprise solutions with dedicated account management and custom rate limits. A newer pricing model called "Owned Reads" lets users access their own data — such as their own posts, bookmarks, followers, and likes — at a steeply reduced rate of $0.001 per resource, rather than paying full price for content they already own.

The X Ads API similarly lets advertising campaigns, audience targeting, and analytics be managed programmatically, complemented by official Python and TypeScript SDKs, tutorials, and community resources. For AI-driven development, X also provides llms.txt files, skill descriptions, and MCP servers, letting both general API functionality and specific ads workflows be driven directly from compatible AI clients.

The business model follows a flexible, credit-based pay-per-use structure with no upfront commitments, complemented by enterprise tiers for high-volume applications.