Open-source SEO tools you can run yourself, read every line of, and hand to your AI agent
See which pages Google and AI crawlers never reach
Stage
Not given
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Founded
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Based in
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Pricing model
Open source
Freemium
Pricing
Hosted app: free, all features unlimited. Self-hosted: free, open source under MIT licence. Search data from YepAPI: paid per lookup. Examples: keyword overview $0.47–$0.57, keyword ideas $0.07–$0.25, SERP checker $0.25–$0.26, rank check $0.02–$0.10, backlink checker $0.30–$0.34. New YepAPI accounts
Free: public checker, no account needed. Starter: $9/month for one site with weekly checks and AI crawler probes. Pro: $19/month for five sites. Agency: $49/month for twenty-five sites.
Key features
Keyword research with difficulty, volume and top 10 results
SERP checker for any location with desktop and mobile options
Rank tracking to top 20, 50 or 100 by country, city or coordinates
Backlink checker with monthly link history
AI visibility tracking across 120+ AI models with web search
Local rank checker with geo-grid maps
MCP server with 76 tools for AI agents
Google Search Console integration
Self-hosting with Docker on your own server
Live crawler probes for Google, ChatGPT, Claude, and Perplexity
HTTP status and redirect tracking
robots.txt rule checking per user-agent
noindex meta tag and X-Robots-Tag detection
Canonical URL validation
Sitemap listing verification
Firewall block detection (403 errors)
Weekly monitoring and email alerts
Plain-English fix prompts
What makes it different
MIT licensed open-source code you can read and modify completely
Self-hosted option keeps all your data on your own server
Pay per lookup with spending limits controlled by you
AI agents have spending ceilings to prevent overspending
Read-only checks that never request Google indexing or change your site
Checks AI crawlers like GPTBot and ClaudeBot separately from Google
Free public check with no account or sign-up required