AI Social Media Agent for X (Twitter)
HERALD writes sharp, plain-text posts for X in your voice, publishes them once you approve, and tracks engagement after they go live.
From topic to published X post
Research the conversation
Before drafting, HERALD researches your topic: fresh data, current takes, and the context your audience already has. Claims are sourced, not invented, so your posts hold up when people push back in the replies.
Written to fit X
Drafts are checked against your account's real character limit: 280 on a standard account, up to 25,000 characters of long-form on X Premium. Formatting markup is stripped automatically because X renders plain text.
Approve, publish, measure
You review every post before it goes out. After publishing, myHERALD tracks engagement on the post, so you can see which angles actually land with your audience.
Built for how X works
Tier-aware length checks
myHERALD knows whether your account is standard or Premium and validates every draft against the right limit before publishing, so posts never bounce at the API.
Up to 4 images per post
Attach up to four images to any post. HERALD uploads them through X's media pipeline and can generate on-brand visuals that follow your visual style guide.
Engagement tracking
Once a post is live, myHERALD records its engagement over time, giving you a real feedback loop on what resonates instead of guesswork.
Nothing publishes without you
HERALD drafts, reviews, and fact-checks on its own, but it does not publish on its own. Every X post lands in your review queue first, where you approve it, edit it inline, or send it back with notes. Nothing is posted to your X account without your explicit approval.
X questions, answered
Does myHERALD support long-form posts on X?
Yes. If your account has X Premium, HERALD can write and publish long-form posts up to 25,000 characters. On a standard account it keeps every post within 280 characters.
Do I need my own X developer account or API keys?
No. You connect your X account once through the official login flow, and myHERALD handles the API access on its side. There is nothing to configure in a developer portal and nothing to pay X for.
What happens if a draft is too long?
myHERALD checks the character count against your account tier before publishing. If a draft runs over the limit, it gets shortened in revision instead of failing when it reaches X.
Can HERALD add images to posts on X?
Yes, up to four images per post. HERALD can generate visuals that follow your visual style guide or attach images you upload to your media library.
HERALD for LinkedIn
Personal profiles and company pages, plain-text posts done right, up to 10 images per post.
HERALD for Bluesky
Real grapheme counting for the 300 character limit, up to 4 images, simple app-password setup.
HERALD for Threads
The 500 character limit handled before publish, carousels up to 20 items, engagement tracking.
Put X on autopilot, keep the final say.
HERALD researches, writes, and publishes. You review and approve. That is the whole deal.