Guest Defender - Sell Project

Guest Defender is a complete website and a working web app (PWA) for travellers who are asked to pay after a stay: damage, extra cleaning, smoke odour, missing items or a deposit that does not come back. The guest uploads the host's request, the booking and their photos. The app reads them with Claude (Anthropic), applies the rules of Airbnb, Booking.com, Vrbo, the card networks and EU payment law item by item, and says for free what can be disputed, what is fair to pay and by when. If letters are needed, the user pays once (€9.99) and gets them ready-made: reply to the host, message to the platform, Airbnb appeal, request to the bank and formal notice. Why it is different On 12 November 2026 we found no guest-side app for this problem, in any language; existing tools help hosts. The topic is in the news: in October and November 2026 several media covered hosts using AI-edited damage photos. The rules are built in, each with its source: Airbnb's 24-hour reply window and 60-day appeal, Airbnb's USD 500 card cap for guests living in the EEA, Switzerland or the UK, Booking.com's 14-day damage policy, Visa's rules for charges after check-out, and the EU 8-week refund for payments without a fixed amount. Every item of a claim is checked against its own evidence: a photo of the sofa does not prove the missing towels. Status (honest) Pre-revenue. Live since 12 November 2026, on its own .com domain since 13 November 2026, with real payments (Stripe). No sales and no customer checks yet. 308 automated tests. 20 test cases with sample documents, run with the real code and Claude Sonnet: 20 of 20 correct in three runs on 14 November 2026. A 21st case with several items in one claim is also correct. AI cost: about USD 0.016 per check. What is included The .com domain and its website: product page, 3 SEO guides in 6 languages, terms and privacy (36 pages in the sitemap). The app runs on a subdomain of the same domain. The full source code: Python FastAPI backend, installable web app in plain JavaScript, Anthropic SDK, the rules engine with its sources, the letters in English, Italian, Spanish and French, the interface in six languages, the tests and the static website. A setup and handover guide in English: Linux or Windows, DNS, Stripe, Anthropic, Caddy, backups. 30 days of setup support by message. Not included: the seller's Stripe, Anthropic, hosting and email accounts. The buyer uses their own; the guide explains how. Running costs: one small server (the app is a single Python process; about USD 5-10 a month, estimate), the domain, and about USD 0.016 of AI per check. About 1-2 hours a week to answer users and keep the rules current (estimate). Good to know Code comments and some identifiers are in Italian; the setup guide and everything users see are in English and five other languages. The domain was registered on 13 November 2026 and goes into the buyer's name right after payment. Like every new .com, it can move to another registrar only from 12 January 2027. Not offered to users or properties in Germany and Austria, for legal reasons. The seller will not build another app for the same need. Payment only through Escrow.com. The domain and the code are handed over once the money is in escrow. Asking price: USD 1,500, open to offers.