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21tunnel
The tunnel for AI agents — open-source ngrok alternative
Mint a master key once — your AI assistant runs autonomously with scoped, short-lived child keys and instant cascade revoke. Built for Claude Code, Cursor, Aider, Devin. Also a complete open-source ngrok alternative in Rust: HTTP, TCP, SSH and gRPC tunnels, sticky subdomains, custom domains on the free tier, edge auth, live request inspector, team RBAC and audit logs. Self-host the whole stack free forever under MIT and Apache-2.0. No tier-locked security features.
Hey Product Hunt. I work with the team building 21tunnel, and the product started with a security problem: every AI coding agent setup ends with "paste your full-access API token into the agent's environment." No expiry, no scope, one prompt injection away from a leak. 21tunnel inverts it — the master key cannot open tunnels at all, it only mints scoped child keys with TTL and project isolation, and one click cascade-revokes everything the agent ever made. Underneath, it is a full open-source ngrok alternative in Rust: custom domains on the free tier, sticky subdomains, request inspector, RBAC, audit logs, self-hostable forever. Happy to answer anything, especially on the security model. What would you never let an AI agent hold?
About 21tunnel on Product Hunt
“The tunnel for AI agents — open-source ngrok alternative”
21tunnel was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #33 on the daily leaderboard. Mint a master key once — your AI assistant runs autonomously with scoped, short-lived child keys and instant cascade revoke. Built for Claude Code, Cursor, Aider, Devin. Also a complete open-source ngrok alternative in Rust: HTTP, TCP, SSH and gRPC tunnels, sticky subdomains, custom domains on the free tier, edge auth, live request inspector, team RBAC and audit logs. Self-host the whole stack free forever under MIT and Apache-2.0. No tier-locked security features.
On the analytics side, 21tunnel competes within Open Source, Developer Tools and Artificial Intelligence — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how 21tunnel performed against the three products that launched closest to it on the same day.
Who hunted 21tunnel?
21tunnel was hunted by gokul. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of 21tunnel including community comment highlights and product details, visit the product overview.
gokul