LinkedIn3,000 characters
We spent six weeks on a feature nobody asked for. Here is why that was the right call — and the three signals that told us so before the data did.
Narrative, first person, one idea per paragraph
One input · seven native outputs
An AI post generator that knows where the post is going
Most generators write one paragraph and let you paste it everywhere. This one writes a different post for each network — because 280 characters and 3,000 characters are not the same piece of writing.
Your input
“We shipped a feature nobody asked for. Six weeks of work. It’s now our second-most used feature. Post about the lesson.”
X (Twitter)280 characters
Nobody asked for it. We built it anyway. Six weeks later it is the second-most used thing we ship.
One claim, no wind-up, no hashtags
Instagram2,200 characters · media required
Nobody asked. We built it anyway 👇 Six weeks. Second-most used feature we ship.
Hook line, whitespace, caption-style tail
Bluesky300 graphemes
Built a thing nobody asked for. It is now our second-most used feature. Sometimes the roadmap is wrong.
Dry, conversational, link-light
What happens between your sentence and a scheduled post
01
Reads your brand kit
Tone, audience, the phrases you use and the ones you have banned, plus a style image. Written into the prompt before your idea is.
02
Writes per network
Not one draft resized seven ways. Each network gets copy built for its length, its line-break conventions and its hashtag norms.
03
Generates the visual
A matching image from a prompt, steered by your brand kit’s reference image, returned as a hosted URL ready to attach.
04
Pre-flights the result
Character counts, missing media on networks that require it, unconnected profiles and the credit cost — before anything is queued.
The tell that a post was cross-posted by a machine
A LinkedIn essay on X
Truncated mid-sentence with a “…” and a link nobody clicks. The 280-character ceiling is not a suggestion.
Instagram hashtags on LinkedIn
Eleven hashtags under a professional post reads as spam on one network and as normal on another.
A caption with no image
Instagram will not accept a post without media at all, and YouTube Shorts needs a vertical video. Text-only fan-outs quietly drop those networks.
Generating per network costs nothing extra in effort — you still write one idea — and it is the difference between a feed presence and an obvious broadcast.
AI post generation FAQ
How does an AI social media post generator work?+
You give it the substance — a launch, a lesson, a link — and it produces publish-ready copy. PostMCP’s generator additionally knows the destination: it writes a separate version per network against that network’s real character ceiling and formatting conventions, then checks the result before anything is scheduled.
Will the posts sound like AI wrote them?+
That depends entirely on what you teach it. A brand kit holding your tone of voice, audience, guidelines and recurring vocabulary is read before every generation. Without one you get competent generic copy; with one you get something recognisably yours.
Can it generate images as well as text?+
Yes. Image generation returns a hosted URL you can attach directly to the post. Pointing it at a brand kit uses that kit’s style image as a visual reference, so generated visuals stay in family rather than drifting between styles.
Does it write hashtags?+
It will, when the network warrants them. Hashtag habits differ sharply — heavy on Instagram, near-useless on LinkedIn, actively harmful on X — so the generator applies per-network convention rather than pasting the same block everywhere.
What does generation cost?+
Generation spends AI tokens; publishing spends credits. They are separate meters, so drafting ten versions and publishing one costs ten drafts’ worth of tokens and one delivery’s worth of credits. Free Forever includes 100k tokens and 20 credits a month.
Can I edit what it produces before it goes out?+
Always. Generated copy lands as a draft or a pending approval, never as something already published. Edit it, re-target it, move its slot, or throw it away — nothing reaches a network until you say so.