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Anders Dahl Rasmussen
Anders Dahl Rasmussen

Posted on • Edited on

Show HN-style: ContentBase — free AI listing optimizer for Etsy/Shopify/Amazon

What I built

Paste any product listing → get an optimized version with better title, description, and 13 keyword-targeted tags in ~10 seconds. Free for 5/day, no signup.

ContentBase: contentbase-crw.pages.dev

Also built ShopScan — $19 on-demand full Etsy SEO audit delivered by email in 24h: shopscan-eff.pages.dev

Why I built it

Etsy has 90M+ active buyers. The sellers who win aren't the ones with the best products — they're the ones whose listings match what buyers actually search for.

"Handmade blue ceramic mug" → almost no traffic.
"Handmade Ceramic Coffee Mug | Blue Stoneware 12oz | Gift for Coffee Lovers" → ranks for a dozen buyer searches.

Same product. One gets found. One doesn't.

Stack

  • Cloudflare Workers (API, keeps Anthropic key server-side)
  • Cloudflare KV (rate limiting: 5 free/day per IP, auto-expiry)
  • Cloudflare Pages (frontend)
  • Brevo (transactional email)
  • Stripe Payment Links
  • Total infra cost: $0/month

Interesting: Pro activation without Stripe webhooks

After payment, Stripe redirects to ?session_id=cs_live_.... Worker validates the format (unguessable), generates token, stores in KV, emails via Brevo. No webhook endpoint needed.

Current status

Day 15 building in public. Distribution is genuinely harder than the build. If you've cracked reaching niche communities (Etsy sellers in this case) I'd love to hear how.

ContentBase free
ShopScan $19 audit

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