What tool do you want?
Examples:

• whois
• nslookup/dig
• SSL certificate lookup
• Website screenshot

Describe the solution you'd like

• Whois allow me to look up who owns an IP address or domain
• nslookup or dig commands to include general look-up of a domain and the ability to specify or check off: A, CNAME, MX, TXT records
• DMARC and DKIM lookup (with automatic DKIM Selector identification if possible; I can supply a list of common ones if needed)
• Pull the SSL certificate from a domain and list the providing organization and expiration date. Often, my computer's antivirus intercepts a certificate with its own, so I need to use an off-system lookup tool to see a client's real certificate.
• Website screenshot: Sometimes a customer or family member asks if a link is safe to open. If I can quickly see what it looks like without loading it on my own machine, I can often tell if it's a phishing page pretending to be a Google or Microsoft sign-in page.

Is their example of this tool in the wild?
Many of these tools come from MXToolbox.com, the command line, DigiCert urlscan.io, etc.

Additional context
I often use IT-Tools for work and personal projects. The above would provide the tools that I go to a variety of vendors and the command line for, putting everything in one place.

Thanks for this amazing utility!