Safe4 is a Model Context Protocol (MCP) server: Tests an AI agent's purchase against the task it was given. Paid per call in USDC via x402. As an MCP server it plugs straight into AI assistants, exposing its functionality as tools the model can invoke on your behalf.
It's a hosted (remote) server — point your client at https://api.safe4.ai/mcp/ and you're connected, with nothing to install locally. The current release is v1.0.0, published under the MIT license, with source at Safe4AI/safe4-mcp on GitHub.
You'll find Safe4 in the AI & Agents category here on mcp.site; it connects to Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and any other MCP client — see the install snippets below. If you maintain Safe4 for safe4.ai, claim this listing to verify ownership, earn the Verified badge, and keep the details current.
