Marketplace Shield

Marketplace Shield helps you slow down and review Facebook Marketplace listings before you message a seller, send money, or share personal information. The extension scans visible text on supported Marketplace item pages and shows an explainable popup with: - Risk level: safe, suspicious, or high risk. - Matched red flags with visible evidence chips. - Score breakdown by listing, conversation, seller, freshness, scam recipe, duplicate history, and trust reduction. - Fresh Proof Checklist with practical verification steps. - Scan-quality warnings when the extension could not see enough listing data for a confident scan. - Scan data that can show visible listing location context and limited image metadata, such as visible image count, alt-text samples, and source hostnames. - Safety questions you can copy before arranging pickup, shipping, payment, or a rental tour. - Optional local feedback and redacted fixture export for improving results. Marketplace Shield can flag patterns such as: - Suspiciously low prices on common high-value items. - Recent visible seller profile signals. - Shipping-only or no-pickup arrangements. - Deposit or prepayment requests. - Verification-code requests. - Obfuscated phone numbers. - Off-platform contact requests. - Outside checkout or product links in visible Marketplace chat. - Fake payment screenshots, pending-payment claims, account-upgrade fees, and overpayment stories. - Rental deposits before a tour. - Vehicle title, VIN, deposit, or wire-transfer pressure. Marketplace Shield is intentionally cautious. It does not claim a listing is definitely a scam. It highlights possible scam patterns and gives you practical next steps so you can verify the seller, item, and payment terms.