X Harness — AI Assistant for X

Draft context-aware replies on X with your own Grok. Reads the thread, polishes your draft, flags anything wrong.

X Harness drafts replies on X using your own Grok account. Click the sparkle button in the reply toolbar. It reads the post you are replying to, the replies already under it, and the thread above your reply box, then writes a few replies you can use or edit. Type a rough draft first and it polishes that instead. It looks things up before you post and flags any claim it cannot back. It also reads the existing replies so it does not hand you an angle someone already used. It never posts anything. It fills the reply box. You press Post. You need your own X account. There is no API key to paste in and no subscription from us. Your drafts and the posts you read go straight from your browser to xAI, and nowhere else. The one server we run does one thing: confirm your license. No analytics, no tracking, no ads. Privacy policy: https://xharness.app/privacy X Harness is an independent tool, not affiliated with X Corp. or xAI.