crossflo.io
Marketplace Bridge

The Crossflo browser extension

A lightweight, optional companion for marketplaces that don't expose an official API. The bridge runs locally in your browser, securely relays actions to your Crossflo workspace, and never stores your marketplace passwords.

Open Dashboard

Works with every Chromium browser

Chrome, Edge, Brave, Arc and Opera. One package, one install.

Privacy-first by design

We never read your password fields. Session cookies stay in your browser; we only detect whether you're signed in.

Supported marketplaces

  • eBay
  • Poshmark
  • Mercari
  • Depop
  • Etsy
  • Facebook Marketplace
  • Grailed

Install in 4 steps

  1. 1. Download the crossflo-extension.zip using the button above, then unzip it to a folder you'll keep.
  2. 2. Open chrome://extensions (or the equivalent on Edge, Brave, Arc, Opera).
  3. 3. Enable Developer mode using the toggle in the top-right corner.
  4. 4. Click "Load unpacked" and select the unzipped folder. The Crossflo icon will appear in your toolbar.

One-click installation via the Chrome Web Store is coming soon — the extension is currently in review.

What the bridge does

  • Detects which marketplaces you're signed into and shows status in your dashboard.
  • Imports listings from a marketplace product page into your Crossflo inventory.
  • Automates Poshmark "Share to followers" and similar repetitive tasks.
  • Relays delist / mark-sold events back to Crossflo when a sale happens.