21tunnel

21tunnel provides secure, public access to local services with a focus on flexible key management for autonomous operations. Key features include: • Master key management with short-lived child keys • Instant cascade revoke for enhanced security • HTTP, TCP, and SSH tunneling capabilities • Sticky subdomains and custom domains available • Built-in request inspector, team RBAC, and audit logs This platform allows users to mint a master key once, enabling various operations to run autonomously using scoped, temporary child keys. The instant cascade revoke feature ensures that if a master key is compromised, all associated child keys and tunnels can be terminated immediately, providing robust security. Beyond its advanced key management, 21tunnel functions as a comprehensive open-source alternative for exposing local services. It supports HTTP, TCP, and SSH tunnels, offering sticky random subdomains and custom domain support even on the free tier. The platform includes an edge authentication system, a live request inspector for debugging, and robust features for teams like Role-Based Access Control (RBAC) and audit logs. Ideal for developers and engineering teams requiring secure, granular control over access to their local development environments and services. It is particularly well-suited for scenarios involving autonomous agents and offers a self-hostable solution under MIT and Apache-2.0 licenses, ensuring all security features are available without tier-locked restrictions.