0sec Labs Open-Sources 0: An AI Security Harness With Web UI, CLI, and MCP Support

0sec Labs has released 0, an open-source AI security harness that provides a unified interface for security testing via a web UI, command-line interface, and Model Context Protocol (MCP) support. The tool is designed to let developers and security engineers run AI-assisted security assessments against their own systems, with MCP integration enabling it to plug into existing agentic workflows. For teams already using MCP-compatible agent frameworks, 0 can be incorporated directly as a security-testing tool within automated pipelines. The open-source nature lowers the barrier to adoption and enables customization for specific threat models or compliance requirements. As agentic systems proliferate, tooling that brings security testing into the AI development loop is increasingly critical.