Chrome Extension & API

The Manifest V3 Chrome extension searches dealership inventory and autofills Facebook Marketplace. Endpoints below are optional accelerators — every request must send the header x-api-key with the private extension key stored in the backend secrets.

Download the Chrome extension

Download and unzip the extension package.
Open chrome://extensions and enable Developer mode.
Click “Load unpacked” and select the unzipped folder.
Open the extension’s Settings and set your dealer inventory URL.

GET

/api/public/extension/vehicle/:stockNumber

Returns a complete, autofill-ready listing package for one vehicle.

{
  "marketplace": "facebook",
  "title": "2024 Toyota Tacoma TRD Off Road 4x4 | Clean CARFAX | Low Miles",
  "description": "…",
  "price": 44995,
  "mileage": 12480,
  "vin": "3TMCZ5AN8RM123456",
  "photos": ["https://…"],
  "features": ["Backup Camera", "…"],
  "vehicle": { "stock_number": "T24881", "year": 2024, "make": "Toyota", … }
}

GET

/api/public/extension/vehicles

Lightweight inventory index for extension autocomplete and sync (100 most recent vehicles).

Marketplace channels

Facebook Marketplace

Live

OfferUp

Planned

Craigslist

Planned

Cars.com

Planned

AutoTrader

Planned