| What it does | Check if search engines and AI crawlers can read your AI-built website before launch
| Free JSON API for construction calculators with test vectors and building codes
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| Pricing model | Freemium
| Open source
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| Pricing | Not given
| Free under CC BY 4.0 licence
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| Key features | - Check what crawlers see without JavaScript execution
- Verify robots.txt, sitemaps and status codes
- Check for noindex tags and canonical URL issues
- Generate copy-paste fix prompts for AI builders
- Audit up to 50 pages with Pro
- Weekly re-checks with email alerts
| - 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 | - Made specifically for sites built with AI builders like Bolt, Replit, Cursor and Claude Code
- Instantly shows exactly what AI crawlers and search engines see
- Provides copy-paste fix prompts tailored to your AI builder framework
- Tests the raw HTML without running JavaScript, like real crawlers do
| - 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 |
| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | Not checked yet |
| Trust Flow (Majestic) | 0 | 0 |
| Citation Flow (Majestic) | 16 | 26 |
| Referring domains (Majestic) | 2 | 29 |