Best MCP servers for security & code scanning

Shifting security left means catching vulnerabilities while code is still being written, not weeks later in a separate review. A security MCP setup lets an AI agent scan the code it just generated or edited, surface findings inline, and fix them before they ever land. The servers below cover the main scanning surfaces: fast semantic static analysis with custom rules, developer-security scans across dependencies and containers, and a full code-quality and security platform with coverage and gates. They overlap deliberately, so pick by what you already run; the value is the same loop of scan, explain, fix, inside the assistant. Each ships a verified, current install config.