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For AI agents

SSL certificate checks, for your agent

Otterwatch runs a remote MCP server that lets Claude, Cursor, or any MCP host check the live SSL/TLS certificate for any domain — issuer, expiry date, days remaining, chain validity, SANs, and TLS version. No account, no key.

Server URL

https://otterwatch.dev/mcp

Streamable HTTP transport. Public and read-only.

Add it to Claude

  1. Open Settings → Connectors (or your workspace's connector settings).
  2. Choose Add custom connector.
  3. Paste the server URL above and save.
  4. Ask: "Check the SSL certificate for example.com."

Config-file hosts (Cursor, etc.)

For hosts that take a JSON config, add:

{
  "mcpServers": {
    "otterwatch-ssl": {
      "type": "streamable-http",
      "url": "https://otterwatch.dev/mcp"
    }
  }
}

Tools

  • check_ssl_cert

    Check one domain's certificate. Returns issuer, subject, valid-from/to, days remaining, expiry and chain-validity flags, SANs, and TLS version.

  • check_domains_batch

    Check up to 20 domains in one call — one result object per domain.

Want alerts instead of one-off checks? Otterwatch watches your certificates daily and emails you before they expire — at 30, 7, and 1 day out. Start watching a site →