ContextOS — Browser-Wide SaaS + Extension + MCP Server
Ready-to-run browser-wide SaaS with a web app, Chrome extension, MCP server, subscriptions, complete source code, domain and deployment setup.
Description
ContextOS is a ready-to-run SaaS product designed to work across the browser through its web application and browser extension. The product includes a complete web application, backend, Chrome extension, MCP server, authentication, subscription/payment infrastructure and deployment configuration. ### Included * usecontextos.com domain * Complete source code * React + TypeScript frontend * Python + FastAPI backend * PostgreSQL database * Chrome Manifest V3 browser extension * MCP server * Clerk authentication * Razorpay subscription/payment integration * Docker configuration * Vercel/Railway deployment setup * Database migrations * Testing setup * Brand assets ### Technology Frontend: React 18, TypeScript, Vite, Tailwind CSS, Radix UI, Zustand and React Router. Backend: Python, FastAPI, SQLAlchemy, PostgreSQL, Alembic and Pydantic. Browser extension: JavaScript with Chrome Manifest V3, designed to work across browser-based websites and tools. MCP server: Python MCP SDK and HTTPX. ### Current status ContextOS is a pre-revenue product with $0 monthly revenue and 0 active subscribers. The product is already developed and can be continued, marketed, expanded with additional integrations and features, or adapted into another SaaS product. The sale is primarily for the completed technology, source code, domain, browser extension, MCP server and development work already invested into the project. The buyer will receive the relevant project assets and can continue development and monetization under their own direction.
How the escrow transaction works
- 1. Payment to escrow
You pay for the listing — funds go to an escrow account, not directly to the seller.
- 2. escrow_held — funds secured
Funds are locked. The seller transfers the domain, code and access.
- 3. in_inspection — inspection period (7 days)
Check the assets you received and confirm receipt to release the funds.
- 4. completed — funds released
Transaction complete. The business is now yours.
Funds are released to the seller only after you confirm receipt of the assets.
Make an offer
Buyers send offers with an optional message. The seller can accept, decline or counter with a different amount — the full history stays visible to both sides.
Sign in to make an offer — it takes a few seconds and the seller is notified by email.
Ask the seller
Ask about revenue, tech stack, or the handover process. The conversation stays within the platform.
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