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 full-featured ngrok alternative.
Your AI assistant runs autonomously with scoped, short-lived child keys and instant cascade revoke. 21tunnel is also a full-featured ngrok alternative — public URLs for your localhost, custom domains on the free tier, and a full request inspector on every plan. No tier-locked features pretending to be free. mytunnel http 3000 , mytunnel tcp 5432 , mytunnel ssh — same agent, three protocols.
Pricing & access
21tunnel has a free tier, with paid plans unlocking more. Check 21tunnel.com for current plans.
Frequently asked questions
What is 21tunnel?
21tunnel is the tunnel for AI agents. 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 full-featured ngrok alternative.
Is 21tunnel free?
21tunnel has a free tier, with paid plans unlocking more.
What are the best 21tunnel alternatives?
People comparing 21tunnel also look at 38-0-0-seriea, Adobe Podcast, AgentZap, AgentZee. See all options in the AI Voice & Audio category on SiftFox.
Work on 21tunnel?
Claim this profile for free - instant with a work email at 21tunnel.com.
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