AI Content Repurposer Kit for n8n: One Article to LinkedIn, X and Instagram, No Invented Numbers

Send one article, get back a LinkedIn post, a 3-tweet X thread and an Instagram caption, built only from facts that are in your article. Then plain code checks every number in the posts against your text, so a $1.65 price never quietly becomes "around $2".

WHAT IT DOES

• Extracts 5 to 10 verifiable facts from your article: numbers, prices, dates, names, quotes

• Writes the three posts from that fact list only: LinkedIn (80 to 150 words), X thread (exactly 3 tweets), Instagram caption with hashtags

• Checks every number in the posts against your article and lists anything that doesn't match under "warnings", before you publish

• Answers with clean JSON you can copy or send on to your scheduler

• Logs every run to a Google Sheet (optional; the answer never waits for the log)

• Clear error messages instead of silence: missing text, no facts found, or a failed API call with the reason

WHAT'S INSIDE

• Ready-to-import n8n workflow file (.json) with notes on the canvas

• Step-by-step setup guide: API key, optional Google Sheet, test request, troubleshooting table

HOW IT WAS TESTED

End to end on clean n8n 1.123 and 2.41 installs with Claude Haiku 4.5, three full runs each, on two real published articles of about 5,000 characters: three posts every time, 8 to 10 facts per article, every number traced back to the article. Error cases tested: text too short, missing title, invalid request, wrong API key.

WHAT YOU NEED (not included)

• n8n: n8n Cloud or self-hosted, version 1.x or 2.x

• An Anthropic API key with credit (console.anthropic.com). Measured: about half a cent per article.

• Optional: a Google account for the log sheet

FAQ

Does it post to my social accounts?

No. It returns the three texts. You paste them in, or send the JSON to Buffer or another n8n node.

Why two AI steps instead of one?

The first step only collects facts that are in your text. The second is told to use nothing else. Then a code check catches any number that slipped in anyway. One prompt can't give you that.

What does it cost to run?

Your n8n plan plus Anthropic API usage, about half a cent per article (measured). No subscription to us.

Can I change the post lengths or tone?

Yes. The instructions are plain text inside the "Write Posts (Claude)" node.

Do you see my articles?

No. It runs on your n8n with your own key.