api 21tunnel.com 21 min read
21tunnel
The tunnel for AI agents — master key, project namespaces, cascade revoke
21tunnel is a public-URL tunnel service built for AI agents. Mint a master key once; your AI assistant mints scoped short-lived child keys, opens tunnels in isolated project namespaces, and one cascade revoke kills everything. Also a full ngrok alternative — HTTP, TCP, SSH, custom domains free, live request inspector. Rust binary.