Marketplace Shield

See the red flags before you send money. Detects suspicious patterns on Marketplace listing pages.

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.