Built a crosslister (in PHP!) that supports Vinted (which has no API)

FLUF Connect (fluf.io) lets resellers list a product once and push it to Depop, eBay, Vinted, Vestiaire Collective, Shopify, Facebook Marketplace, Temu, and Yaga with real-time inventory sync. Available as a web dashboard, Chrome extension, and mobile app (iOS + Android).

The hard problem isn't the listing — it's the sync. When something sells on Depop at 2am, eBay and Vinted stock needs to update in seconds or the seller wakes up to overselling complaints and bad reviews.

Some things I learned building this:

- Marketplace APIs lie: Response formats change silently. Endpoints return 404 for reasons that have nothing to do with the item not existing. You can't trust the contract — you need fallbacks for everything.

- Relisting matters more than listing: Resellers delete and re-post items to boost visibility in marketplace algorithms. The difference between random relisting and data-driven relisting is measurable in sales.

- AI handles the heavy lifting: Take a photo, and AI generates the title, description, category, price, and condition — ready to list across all platforms. The mobile app also has an AI chat agent that helps sellers refine existing listings with better copy and pricing based on what actually sells.

- Smart pricing across platforms: Each marketplace has different fee structures, shipping costs, and buyer expectations. We built a pricing engine that adjusts prices per-platform so sellers hit their target sellthrough rates everywhere without manual calculations.

- Mobile app for on-the-go sourcing: Sellers photograph items at charity shops or car boot sales, AI creates the listing, and it's live on 8 platforms before they leave the shop.

- WordPress scales further than people think: We process 500,000+ products and tens of thousands of async jobs daily on a PHP/WordPress stack. It's not sexy but it works.

~1,000 resellers use it. 30-day free trial, paid plans from £19/month.

Happy to answer questions about the reselling market or building on top of platforms that don't want you to.