How I Built a Tool to Cross-Post Nostr Notes to LinkedIn, Facebook, and X — in Under 3 Hours

Andrew G. Stanton - May 21, 2025

I recently released my first open-source tool:
👉 nostr-signal-filter

It fetches and formats your latest top-level Nostr note or long-form article, cleans up any embedded links using TinyURL, and outputs a clean version ready for reposting to:

• LinkedIn

• Facebook

• X / Twitter

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⚙️ Built for Simplicity#

The stack is intentionally minimal:

• Python + WebSockets + Bech32

• TinyURL API for link shortening

• Dockerized CLI usage:

bash

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docker run --rm -e PUBKEY=npub1yourpubkeyhere nostr-fetcher > latest.md

From idea to working repo took under 3 hours — including debugging, Docker tweaks, README cleanup, and tagging a clean release.

This most certainly would have taken much longer if I had done this all without ChatGPTs' help.

🖼️ Example Output (latest.md)

text

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🕒 2025-05-20 22:24:17 📄 Note (originally posted on Nostr/primal.net) --- 🚨 New long-form drop: AI Isn’t Magic. It’s Engineering. How I use ChatGPT like any other tool in the stack — with iteration, discernment, and real output. Read it here: https://tinyurl.com/ynv7jq6g ⚡ Zaps appreciated if it resonates. --- 🔗 View on Nostr: https://tinyurl.com/yobvaxkx

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🧪 Where I Used It#

• ✅ My LinkedIn post ->

  https://www.linkedin.com/posts/andrew-g-stanton_primal-activity-7330808691933282304-QjmF?utm_source=share&utm_medium=member_desktop&rcm=ACoAAABQv18BeAPYRkxkYSr1mQStB9TczIhoXvQ

• ✅ Facebook: clean rendering with preview ->

  https://www.facebook.com/andrewgstanton/posts/pfbid027EHZ1brPRBkHQKNsqUijPdPZGvK9id9asErdTxwjSDEf336o9TsuDPeKugToVDx7l

• ✅ X/Twitter: teaser + link (had to truncate for character limit) ->

  https://x.com/AndyGStanton/status/1925045477172773136

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🙌 Try It Yourself#

If you're publishing on Nostr but still sharing on legacy platforms:

👉 github.com/andrewgstanton/nostr-signal-filter

• Clean output

• Easy to run

• Portable via Docker

All it needs is your npub.

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⚡ Zap Me If You Found This Useful#

If this tool saved you time — or if it sparked ideas for your own Nostr publishing stack —
send a zap my way. I’m always looking to connect with other creators who value signal > noise.

🔗 Zap on Primal -> https://primal.net/andrewgstanton

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🔭 Next Features (I’d Love Help With)#

• Archive all notes + articles (not just the latest 50) to archive.md

• Function to shorten links in any text block

• Output post.md for any given Nostr event ID (not just latest)

• Optional API integration to post directly to LinkedIn or X

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Built with ChatGPT’s help.
Iterated. Published. Cross-posted.
That’s proof of work.