Policy Gate is a Model Context Protocol (MCP) server: Deterministic allow/require_approval/deny verdicts for agent actions, before they happen. Because it speaks the Model Context Protocol, AI assistants can use Policy Gate as a set of callable tools instead of you copy-pasting between apps.
It's a hosted (remote) server — point your client at https://policy-gate.3labsio.workers.dev/mcp and you're connected, with nothing to install locally. The current release is v0.2.0, published under the MIT license, with source at fieldproofhq/policy-gate on GitHub.
On mcp.site, Policy Gate sits in the AI & Agents category. Any MCP client can use it — Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed among them — via the install snippets below. If you maintain Policy Gate for policy-gate.3labsio, claim this listing to verify ownership, earn the Verified badge, and keep the details current.
