Preflight

Overview

Preflight is an MCP server that scans other MCP servers for security gaps before your agent connects to them. It offers a free tier with no signup required, letting you identify potential vulnerabilities upfront and run security checks as part of your integration workflow.

Preflight runs as a remote hosted service at https://preflight.allthepossibles.com/mcp with no authentication needed. The latest release is v1.0.0. Simply point your MCP client to the endpoint and start using it immediately without any local installation or configuration.

Preflight is listed in the Security category on mcp.site and works with any MCP client including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. If you maintain Preflight for allthepossibles.com, you can claim this listing to verify ownership and keep the information up to date.

Installation

Settings → Connectors → Add custom connector
Name: Preflight
URL:  https://preflight.allthepossibles.com/mcp