The web

Website monitoring: tools for AI agents

Check whether a site is up, how fast it is and whether its certificate is valid. The best matches among the MCP servers, command-line tools, web APIs and Claude Code plugins AptLynx checks every night, working ones first.

MCP servers

• Nslookup: ssl_certificate Working at last check
  Check the SSL/TLS certificate for a domain. Returns issuer, expiry date, days until expiry, certificate chain validity, cipher strength, SAN domains,…
• Oh Dear Verified publisher · Needs a sign-in or key
  Website monitoring: uptime, SSL certificates, broken links, DNS, cron jobs and status pages.
• Upcheck Verified publisher · Needs a sign-in or key
  Monitor website uptime, SSL certificates, DNS, domain expiry and page changes, and manage alerts.
• Usefulapi Statuscake: statuscake_list_ssl_checks Verified publisher · Working at last check
  List SSL certificate checks with the certificate's validity window (valid_from/valid_until), issuer, cipher and score, and flags such as expired, broken,…
• Uptimeify: check_ssl Verified publisher · Working at last check
  Fetches and evaluates a host's TLS certificate over a live handshake: subject, issuer, validity window, days until expiry, hostname match, chain trust,…
• Data Tools: ssl_certificate Working at last check
  TLS certificate of a domain: whether it is valid, issuer, subject, valid-from and expiry dates, days left, all SAN hostnames, TLS version and cipher. Use for…
• io.github.mrfentmen/uptime-mcp Runs on your computer
  Check website availability, latency, and TLS certificate expiry locally. No key required.
• Ohsnap: check_website Verified publisher · Working at last check
  One-off check of whether a website is up right now, from OhSnap's probe network. Works without an account. Use when the user asks "is my site down?", "is X…
• Site Check: check_website Verified publisher · Working at last check
  Loads the homepage of one public website over HTTPS, the way a visitor's browser would, and reports its HTTPS setup, TLS certificate and security headers…
• Krakenshield: check_ssl Verified publisher · Working at last check
  Checks the HTTPS setup of a public website in a few seconds: TLS certificate (issuer, expiry, trust, name), negotiated TLS version, redirect from HTTP to…
• upkeep-mcp Runs on your computer
  Website maintenance checks: domains, SSL, uptime, technical SEO and accessibility
• Is It Down: check_certificate Verified publisher · Working at last check
  Reads the HTTPS certificate of a public domain and reports days until expiry, the expiry date and the issuer.
• Call402: ssl-check Working at last check
  TLS/SSL certificate check for any public host: issuer, subject, SAN list, validity window, days until expiry, SHA-256 fingerprint and whether the certificate…

Command-line tools

• testssl
  Tool which checks for the support of TLS/SSL ciphers and flaws
• gsan
  Extract subdomains from SSL certificates in HTTPS sites
• simple-ssl-acme-cloudflare
  Simple SSL with ACME and CloudFlare is a tool to simply apply SSL certificates by using OpenSSL and ACME via CloudFlare DNS.
• dnsrobocert
  Manage Let's Encrypt SSL certificates based on DNS challenges
• tlsx
  Fast and configurable TLS grabber focused on TLS based data collection
• sslscan
  Test SSL/TLS enabled services to discover supported cipher suites

Web APIs

• AWS Certificate Manager
  Certificate Manager You can use Certificate Manager (ACM) to manage SSL/TLS certificates for your Amazon Web Services-based websites and applications. For…
• Just Eat UK
  Just Eat API Just Eat offers services for our various business partners and our consumer applications. How you interact with the API depends on the services…
• PageSpeed Insights API
  The PageSpeed Insights API lets you analyze the performance of your website with a simple API. It offers tailored suggestions for how you can optimize your…
• Certificates API Client
  Certificates API Client (azure.com) cloud
• ote-godaddy.com:certificates
  ote-godaddy.com:certificates (ote-godaddy.com) hosting
• Certificate Manager API
  Certificate Manager API (googleapis.com) analytics media

Claude Code plugins

• mcp-tunnels
  Connect Claude to a private MCP server through an Anthropic MCP tunnel. The /create-docker-mcp-tunnel command drives the Docker Compose quickstart end to end:…

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Related topics

• Web scraping
• Browser automation
• Web search
• SEO
• Domains and DNS
• Website screenshots

Listing text is written by each tool's maker; AptLynx lists tools and does not vouch for them.