The X Account Activity API is a set of endpoints for retrieving and managing Account Activity subscriptions on the X platform. The X-published contract describes 5 operations, and it sits alongside X's real-time layer of webhooks and streams. Developers building tools that react to what happens on an X account would look at it. This is a listing posted by the APIs.io catalog. APIs.io does not own or sell this API, and access comes from the provider, X.
About the provider: X (formerly Twitter) runs the X Developer Platform, including the X API v2, a 190-operation REST surface covering Posts, Users, Direct Messages, Lists, Spaces, Media and more. X also publishes an llms.txt family, an AGENTS.md, an agent skill, an A2A agent card and two hosted MCP servers.
Published for this API: OpenAPI, Documentation and APIsJSON.
Catalog ratings for the provider X: Kin Score 74.7 (exemplar band). Agent Readiness 61.2 (agent-native band, scored 2026-11-02).
Access: self-serve signup, with usage sold as prepaid credits under pay-per-usage, and an Enterprise agreement for volume above the published cap.
Pricing: set by the provider.
Condition: a live hosted API at https://api.x.com, listed in the APIs.io catalog.
Catalog listing: https://apis.io/apis/x/x-account-activity-api/ Provider: https://x.com/