`dns_lookup`

15 servers reported a tool by this name when we called them. Names are chosen by whoever wrote the server, so two tools sharing a name do not have to do the same thing. We record what was reported, not what it does.

server	result when we called it	tools
contrastapi https://api.contrastcyber.com/mcp/	answers-mcp	55
quartermaster https://quartermaster.surewhynot.app/mcp	answers-mcp	49
gadgethumans-mcp https://api.gadgethumans.com/mcp	answers-mcp	46
resistance-tools-mcp https://app.resistance.dog/api/mcp	answers-mcp	46
nslookup https://mcp.nslookup.io/mcp	answers-mcp	23
domainposture.com https://www.domainposture.com/mcp/mcp	answers-mcp	22
mailx-deliverability https://themailx.com/mcp	answers-mcp	16
hackmyip https://hackmyip.com/mcp	answers-mcp	15
pcblt https://pcblt.com/mcp	answers-mcp	12
Crypto Market Pulse & Base USDC Stats https://baseusdcearn.pythonanywhere.com/mcp	answers-mcp	8
Crypto Market Pulse & Base USDC Stats https://cryptopulse.pythonanywhere.com/mcp-json	answers-mcp	8
Crypto Market Pulse & Base USDC Stats https://cryptopulse.pythonanywhere.com/mcp	answers-mcp	8
domain-intel https://domain.datakoot.com/mcp	answers-mcp	6
domain-intelligence-mcp-server https://nexgendata-mcp-proxy.steve-corbeil.workers.dev/domain-intelligence-mcp-server/mcp	answers-mcp	4
domain-intel https://api.lazy-mac.com/domain-intel/mcp	answers-mcp	4

15 of these answered an MCP handshake on the day we checked. That is not a promise the tool works, only that the server was running and told us the tool existed.