DNS & Domain — DNS, WHOIS, SSL & domain checks

Tools / DNS & Domain

DNS Lookup

Resolve DNS records for a domain. Returns A, AAAA, MX, TXT, CNAME, NS, CAA, and SOA records in parallel. Supports querying specific record types or all at once. Reports errors separately from empty results.

Returns: DNS records grouped by type with TTL and priority information where applicable

Parameters

domain *stringDomain name to resolve (e.g. "example.com")

record_typestringDNS record type to query. Use "ALL" to fetch all record types in parallel.

Example

Look up all DNS records for google.com

curl -H "Authorization: Bearer $TOOLROUTER_API_KEY" \
  -d '{
  "tool": "dns-domain",
  "skill": "lookup_dns",
  "input": {
    "domain": "google.com"
  }
}' \
  https://api.toolrouter.com/v1/tools/call

WHOIS Lookup

Perform a WHOIS lookup for a domain. Returns registrar, creation date, expiry date, nameservers, and registration status. Connects directly to WHOIS servers.

Returns: Parsed WHOIS data including registrar, dates, nameservers, status, and raw response

Parameters

domain *stringDomain name to look up (e.g. "example.com")

Example

WHOIS lookup for google.com

curl -H "Authorization: Bearer $TOOLROUTER_API_KEY" \
  -d '{
  "tool": "dns-domain",
  "skill": "whois_lookup",
  "input": {
    "domain": "google.com"
  }
}' \
  https://api.toolrouter.com/v1/tools/call

Check SSL Certificate

Inspect the SSL/TLS certificate for a domain. Returns issuer, subject, validity dates, protocol version, and days until expiry. Connects via TLS to port 443.

Returns: SSL certificate details including trust status, hostname match, issuer, expiry, cipher suite, and fingerprint

Parameters

domain *stringDomain name to check SSL for (e.g. "example.com")

portnumberPort to connect to (default 443)

Example

Check SSL certificate for github.com

curl -H "Authorization: Bearer $TOOLROUTER_API_KEY" \
  -d '{
  "tool": "dns-domain",
  "skill": "check_ssl",
  "input": {
    "domain": "github.com"
  }
}' \
  https://api.toolrouter.com/v1/tools/call

Check Domain Availability

Check if a domain name is registered or available for purchase. Uses DNS resolution and WHOIS to determine registration status. Supports batch checking of multiple domains.

Returns: Availability status for each domain (available/registered)

Parameters

domains *arrayList of domain names to check (e.g. ["example.com", "example.io"])

Example

Check availability of several domains

curl -H "Authorization: Bearer $TOOLROUTER_API_KEY" \
  -d '{
  "tool": "dns-domain",
  "skill": "check_availability",
  "input": {
    "domains": [
      "coolstartup.com",
      "coolstartup.io",
      "coolstartup.dev"
    ]
  }
}' \
  https://api.toolrouter.com/v1/tools/call

Quick Start

MCP (Claude Code)

claude mcp add --transport stdio \
  --env TOOLROUTER_API_KEY=YOUR_API_KEY \
  toolrouter -- npx -y toolrouter-mcp

REST API

curl -H "Authorization: Bearer $TOOLROUTER_API_KEY" \
  -d '{"tool":"dns-domain","skill":"lookup_dns","input":{}}' \
  https://api.toolrouter.com/v1/tools/call