Free tunnel limits
A practical checklist for developers comparing free localhost tunnel plans for webhooks, stable URLs, demos, and daily development.
Direct answer
Check whether the free plan gives you enough session time, stable URLs, concurrent tunnels, and provider-friendly HTTPS behavior. InstaTunnel Free focuses on 24-hour development sessions and stable local webhook workflows.
| Limitation to check | Why it matters | InstaTunnel workflow |
|---|---|---|
| Session duration | Short sessions can interrupt demos, QA review, and webhook provider retries. | InstaTunnel Free is designed around 24-hour sessions for a full development day. |
| Changing URLs | Random URLs can force manual callback updates in third-party dashboards. | Reserved subdomains keep webhook and demo links stable across restarts. |
| Concurrent tunnel needs | Multiple local services may need separate public URLs during integration testing. | Use the plan level that matches your concurrent workflow and check current plan limits on pricing. |
| Custom domain and subdomain workflows | Provider callbacks, OAuth redirects, and team docs are easier with memorable URLs. | Use stable subdomains for repeatable callback and demo URLs. |
| MCP endpoint tunnels | AI tools and MCP servers may need public HTTPS endpoint access during development. | MCP endpoint tunnel support is available on InstaTunnel Pro. |
Prefer stable HTTPS URLs. If a provider stores a callback endpoint, the tunnel URL should be easy to reuse after restarts.
Open webhook guidePrefer session length and a memorable URL. A demo should not stop because a short tunnel window expired.
Open localhost guidePrefer a plan that explicitly supports MCP endpoint tunnel workflows and stream-friendly transport choices.
Open MCP guideDevelopers usually check session duration, URL stability, concurrent tunnels, custom domains, request or bandwidth limits, team access, and whether paid features are needed for webhook or demo workflows.
ngrok plan details can change, so verify the current free plan in ngrok directly. If your practical problem is keeping a tunnel alive through a full development day, InstaTunnel Free is designed around 24-hour sessions.
Webhook providers store a callback URL. If the URL changes after a restart, you need to update Stripe, PayPal, GitHub, Shopify, Twilio, or any other provider dashboard before events reach localhost again.
Yes for basic development use. Start a public HTTPS tunnel, use a stable subdomain when needed, and keep the session running while your local app receives provider callbacks.
Upgrade when you need higher limits, more predictable workflows, MCP endpoint tunneling, more concurrent usage, or support for team-critical demos and integrations.