One link, two boxes to fill in, and every Claude chat can search Facebook Marketplace, eBay, Depop, and Poshmark.
Nothing to install. You add Secondhand MCP once from a desktop browser, and after that it works everywhere you use Claude, including the phone app. The free tier needs no credit card.
Takes about two minutes, once
A Secondhand MCP sign-in window opens. Use your email (we send a one-click link) or Google, then click Allow. That creates your free account, with 10 searches a month and no card needed.
Ask Claude for something. Copy this to start: Find a used road bike under $400 near Austin, TX
In the chat, open the tools menu (the + or sliders icon next to the message box) and make sure Secondhand is switched on. Then ask again.
Check your spam folder, or go back and choose Google instead. That one is instant.
Yes. Add it once from a desktop browser. After that it works in Claude everywhere, including iPhone and Android.
Adding your own connector needs a paid Claude plan. Secondhand MCP itself has a free tier with 10 searches a month and no credit card.
Facebook Marketplace and eBay. Depop and Poshmark are on Pro ($5/mo).
It can only search and read listings. It never posts, messages sellers, or buys anything. You sign in with your own email or Google, and you can remove it from the connector list in Claude at any time.