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CarLens

Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

CarLens — Demo video

CarLens is a browser extension built to help anyone from the everyday person to an experienced and enthusiast car guy make an educated and informed decision when looking to purchase a used car from Facebook Marketplace. With one click while on a Facebook Marketplace listing for a car, the extension provides comprehensive information about and around the car so users can get the full picture into what they are getting into. Known issues, red flags, questions to ask the seller of the car, and even a maintenance schedule so the user can set aside extra cash for maintenance or plan for the future of owning the car. Finally, a comprehensive lookup on the NHTSA database, a database full of recalls and complaints based on VIN, make, model, year, and even trims. Everything needed to make an informed decision before making a purchase. The extension also provides a draft message to send to the seller to start up conversation. For users' convenience, the extension allows for saving the listing in the extension so users can have a quick place to see the cars they are interested in and the extension can export all the details about the car from the listing into a Markdown file. Meta's Muse is known for having access to Meta products and be able to interact with them to help users in whatever help they need. This extension serves to be a sort of vision for what Muse integration could look like for Facebook Marketplace. Definitely could be improved upon, refined, and more added but I feel this is something like what Muse would look like and could do for users on all sorts of listings for all sorts of things on Marketplace instead of just cars.

Team