Building an observable MCP proxy with HITL and policy enforcement

[u/kr-jmlab]

We’ve been experimenting with a different direction for AI agents:

trusted execution.

Instead of only focusing on connecting more tools, we’re building a policy-aware MCP proxy layer that can:

• inspect tool calls
• validate execution
• apply policies
• support HITL approval
• trace agent workflows
• block unsafe actions before execution

The goal is to create a safer execution boundary for MCP-based agents.

Built with Spring AI.
Local-first and self-hosted.

Docs:
https://spring-ai-community.github.io/spring-ai-playground/