Relay Lister for Chrome

Posts your Relay listings to Grailed and Poshmark from your own browser, using the account you're already logged in to, and takes them down there when the item sells anywhere. More marketplaces are on the way.

Add to Chrome

Then

Stay logged in to Grailed and Poshmark in the same Chrome profile, and sign in to relaycloset.com there too.
On Grailed, finish seller setup once: verify your phone, set up payouts (Stripe) and add a return address. Starting one listing on Grailed walks you through all three.
On any item in your Relay closet, click Post to Grailed or Post to Poshmark. From the Relay app, tap Post with Relay Lister and your computer posts it at its next check-in.

Before you use it

Grailed and Poshmark don't offer listing tools for apps. Relay Lister works in your logged-in browser the way you would, so their own rules for your account still apply, and marketplaces can limit accounts that use automation.
Your marketplace passwords and logins never leave your browser. Relay only receives the link to each listing it posts. See privacy.
Relay Lister runs in desktop Chrome (and Chrome-based browsers like Edge, Brave and Arc). On iPhone, queue the post in the Relay app and your computer posts it.

Can't use the Chrome Web Store? Install it by hand

Download Relay Lister and unzip it somewhere you'll keep it.
In Chrome, open chrome://extensions and turn on Developer mode (top right).
Click Load unpacked and choose the unzipped relay-lister folder.