Site Check by Modern Mustard Seed
Site Check reads a public website the way a browser, a search engine and an AI assistant would, and reports what it measured.
It checks server speed and page weight, HTTPS, certificate and domain expiry, security headers, email authentication (MX, SPF, DMARC), title, description, indexability and sitemap, structured data, AI crawler rules and llms.txt, and whether a visitor can call or write. Every warning and failure comes with a plain fix and an effort level, and the site gets a 0 to 100 score built from the measured checks.
MCP connector
- Server URL
https://mcp.modernmustardseed.com/site-check- Login
- None
- Protocol
- MCP 2026-07-28
- Instructions
Site Check measures public websites. runs the full health check, focuses on AI crawlers, llms.txt and structured data, blends a website scan with Google review and profile facts you supply, and describes any check id. All tools are read-only and only reach public websites.
Tools
Reads data4
Skills
None in the store listings or on the server
Ahrefs#65