21tunnel

About

Generate a master key one time, and your AI assistant will operate independently using limited, temporary child keys with immediate cascade revocation. Designed for Claude Code, Cursor, Aider, and Devin. It also serves as a fully open source alternative to ngrok, built in Rust, supporting HTTP, TCP, SSH, and gRPC tunnels. Features include persistent subdomains, custom domains on the free plan, edge authentication, a live request inspector, team based role access control, and audit logs. Self host the entire platform at no cost permanently under the MIT and Apache 2.0 licenses. Security features are never restricted by pricing tiers.