Cross-post everywhere without sounding copy-pasted everywhere
The same announcement should read differently on LinkedIn and on X. PostMCP sends one action to seven networks and lets each one carry its own copy, its own media and its own delivery record.
“Multi-workspace support is live. One account, one bill, every client separated.”
Long-form: the why, the problem, the ask.
“Ship: workspaces. One bill, clean separation.”
Conversational, one hook line.
Trimmed to 300 graphemes.
Caption + generated visual.
Same as LinkedIn, page voice.
Cross-posting fails at the tightest limit in the set
Write for LinkedIn and X rejects it 2,720 characters later. These are the ceilings that decide whether a fan-out survives — checked before your post is queued, not after.
Bar width is logarithmic-ish for legibility; Facebook’s 63,206 sets the scale.
Name the profiles
You pick exactly which connected profiles receive the post. Three LinkedIn pages connected does not mean a LinkedIn post lands on all three.
"targetAccounts": [
{ "platform": "linkedin", "profileId": "lin_774…" },
{ "platform": "twitter", "profileId": "tw_129…" }
]Name the platform
Every connected profile on that network gets the post. Powerful for an agency broadcasting to a client set — costly if you meant one page.
"platforms": ["linkedin", "twitter", "bluesky"] // → every connected profile // on each of those networks
Priced per delivery, told to you before you commit
LinkedIn, Facebook, Instagram, Threads, Bluesky, YouTube
X/Twitter API access is priced differently upstream
Charged once per post whose copy contains a link
A dry run reports the total before anything is queued — so a six-network broadcast never surprises your balance. See credit plans.
Cross-posting questions
- What is a cross-posting tool?
- A cross-posting tool takes one piece of content and publishes it to several social networks from a single action. The naive version sends identical text everywhere; a useful one adapts the copy to each network’s limits and conventions, and reports what happened on each destination separately.
- Can I use different text on each platform?
- Yes, and you should. Give any target its own copy and the rest fall back to the shared text — so a 280-character X post and a 3,000-character LinkedIn version go out from the same action. The built-in AI agent can generate those variants for you from one idea.
- What is the difference between targeting profiles and targeting platforms?
- Targeting profiles sends the post to exactly the profiles you name. Targeting a whole platform fans out to every connected profile on it — useful when you mean it, expensive and embarrassing when you do not. PostMCP defaults to explicit profile targeting for that reason.
- What happens if the post is too long for one network?
- Pre-flight catches it before anything is queued. You get told which network rejects it and by how many characters, so you can shorten that one variant rather than dumbing down every version.
- Does cross-posting to seven networks cost seven times as much?
- It costs one credit per profile delivered to, except X which costs 5, plus a one-off 50-credit surcharge if the copy contains a link. Pre-flight reports the exact cost before you commit, so there are no surprises at publish time.
- Can Instagram and YouTube be included in a cross-post?
- Yes, with their own rules: Instagram will not accept a post without media, and YouTube Shorts requires a vertical video. Pre-flight flags a cross-post that includes them without suitable media instead of failing halfway through the fan-out.