| What it does | Create secure public URLs for localhost projects instantly without downloading any binary
| Free JSON API for construction calculators with test vectors and building codes
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| Stage | Not given
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| Founded | Not given
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| Based in | IN
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| Pricing model | Freemium
| Open source
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| Pricing | Free plan: $0/month with single command tunneling, HTTP(S), TCP, UDP, TLS tunnels, live header manipulation, request-response inspection and replays, 60 minute tunnel timeout, random subdomains, and unlimited data transfer. Pro plan: billed annually with persistent tunnels, custom subdomains, custom
| Free under CC BY 4.0 licence
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| Key features | - No downloads required - runs everywhere on Windows, Mac, Linux, and Docker
- Multiple protocols: HTTP, TCP, UDP, and TLS tunnels with built-in Let's Encrypt certificates
- Instant public domains with custom subdomains and wildcard domain support
- Access control via password authentication, bearer tokens, and IP whitelisting
- Live HTTP request inspection, replay, and header manipulation
- Multiple server regions: USA, Europe, Asia, Brazil, and Australia
- Desktop GUI application for easy tunnel management
- Rich terminal interface with live request logs and bandwidth statistics
- Auto-reconnection and auto-start on boot options
- Web debugger built into the dashboard for inspecting tunnel traffic
| - 1,173 construction calculators with full inputs and test vectors
- 3,485 published test vectors for validation
- No authentication key or rate limits required
- Citations to building standards with section numbers
- Executable API for running calculations on request
- MCP server integration for AI assistants
- 79 job takeoffs with calculator sequences
- Cross-market glossary in US, Canadian, UK and Australian usage
- Corrections ledger tracking confirmed errors
- Unit conversion with exact statutory factors
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| What makes it different | - No binary downloads required - just use one SSH command to create tunnels instantly
- Works out of the box on all platforms without additional installation
- Built-in web debugger for live HTTP request inspection and replay without external tools
- Simpler alternative to Ngrok with faster setup and more affordable pricing
- Support for end-to-end encrypted TLS tunnels for zero-trust scenarios
| - No API key required with no rate limits or quotas
- CC BY 4.0 licence allows commercial use and redistribution
- Every calculation cited to specific building code sections
- Pinned test cases prevent silent changes to published figures
- Complete accessibility with CORS support for browser use
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 57 ▼ −1 (down) since last check | Not checked yet |
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| Trust Flow (Majestic) | 11 | 0 |
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| Citation Flow (Majestic) | 37 | 26 |
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| Referring domains (Majestic) | 867 | 29 |
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