Real-time MCP interceptor that blocks .env reads and dangerous commands agents

MarketNow is a marketplace offering 9,248 MCP (Model Context Protocol) servers for AI agents, with a real-time security interceptor called Sentinel that blocks dangerous commands and unauthorized .env file reads. The platform features 43 free skills, one-time pricing ($0.99–$9.99), and security audits on every skill to ensure safe agent integration across Claude Desktop, Cursor, and other MCP-compatible tools. All skills are filterable by security score, GitHub stars, and npm downloads, with a human-in-the-loop approval system enabled by default.