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Cross-section diagram of a private tunnel boring through layered strata, representing an MCP tunnel into a self-hosted server.

Article May 28, 2026

The MCP Server That Matters Most Will Be the One You Built Yourself

In May 2026, OpenAI shipped a feature called Secure MCP Tunnel. Weeks later Anthropic shipped one called MCP Tunnels. The mechanics are nearly identical. Both let an autonomous agent reach a private ...