Proximity: Open-Source MCP Security Scanner
Help Net Security, Wednesday, October 29th, 2025
Proximity is a new open-source tool that scans Model Context Protocol (MCP) servers. It identifies the prompts, tools, and resources that a server makes available, and it can evaluate how those elements might introduce security risks.
'Over the past year, MCP has been rapidly adopted by the community to extend AI capabilities. Developers around the world started creating their own MCP servers, often publicly accessible. But this growth also increased the attack surface, and exposed clients to risks like prompt injection, tool poisoning, or data exfiltration among many others. I created Proximity to provide a first security assessment of an MCP server before deploying it in an environment,' Thomas Roccia, the author of Proximity, told Help Net Security.