At a glance

Post types: Post, Thread, Up to 4 images, a GIF or a video, Link in the first reply
Accounts: Any X account you can sign in to.
Text: Up to 280 characters; longer text becomes a thread of 280-character posts.
Media: Up to 4 photos, videos or GIFs per post, one kind at a time. Images up to 5 MB. Video up to 512 MB and 2 min.
Links: Clickable.
Cost: X charges $0.015 a post and $0.20 with a link, passed on at cost.
Status: Live

X posts are sent through bundle.social, an API partner, which receives the post content and the X connection to publish it.

How to connect

Ask your AI to "connect my X account".
Sign in on X's own page and authorize the app (it may show our partner bundle.social).
Your account is added.

"Post this to X and put the link in a reply."

"Turn these notes into a 5-post X thread for tomorrow at 8."

"Set my X spend cap to $10 a month."

X charges apps for every post: about $0.015 a post and $0.20 for a post with a link. Saymany passes this on at cost.
Ask Saymany to put the link in a reply, so only the reply costs the link rate.
Long text becomes a thread automatically.