PlugSprout Site Check

PlugSprout Site Check is a ChatGPT plugin with three read-only checks for public domains.

What it does

• Compare DNS answers: looks up A, AAAA, CNAME, MX, TXT or NS records at four public DNS resolvers (Cloudflare, Google, Quad9 and OpenDNS) and reports whether they agree.
• Check a TLS certificate: reports whether the certificate on port 443 is valid, its expiry date and days left, its issuer, whether it matches the domain name, and whether its chain is trusted.
• Check reachability: requests a public URL and reports the HTTP status code, the response time, the host of each redirect, and whether the final response used HTTPS.

What it does not do

• It does not contact private, local or reserved network addresses.
• It does not return page content.
• It does not need an account and does not store your results.