Resolve A/AAAA/MX/TXT/NS/CNAME and report DNSSEC-related DS/DNSKEY/RRSIG presence (not full chain validation).
- Free
- No signup
- Fast
- Privacy-friendly
What next?
Keep going with DNS Lookup
Finish this check in the browser, then pick the path that matches how you work — another related tool, REST for apps, or MCP for agents.
- 1. Related check
After this result, run TLS certificate checker for the next signal.
TLS certificate checker - 2. Automate with API
Same job from your server with
Create free accountX-Api-Key. Free tier includes 500 credits/month. - 3. Hand off to an agent
Connect Cursor or Claude to ToolYour MCP — plan → run → verify.
MCP setup
What is DNS Lookup?
Resolve core DNS records and see whether DS/DNSKEY/RRSIG appear for the name. Presence only — not cryptographic DNSSEC validation. Pair with <a href="/security-tools/spf-dkim-dmarc-checker">SPF/DKIM/DMARC Checker</a> and <a href="/security-tools/security-txt-checker">security.txt Checker</a>.
What are common questions about DNS Lookup?
Is this available via API and MCP?
Yes. Same route under /api/v1/security-apis/{slug} with one ToolYour API key.
What does DNS Lookup do?
Resolve A/AAAA/MX/TXT/NS/CNAME and report DNSSEC-related DS/DNSKEY/RRSIG presence (not full chain validation).
What are the key features of DNS Lookup?
Core record types
A, AAAA, MX, TXT, NS, and CNAME in one report.
How do you use DNS Lookup?
Enter a domain
Bare domain or full URL works.
Verify mail and web records
Check MX/TXT for email and A/AAAA for web.
Free · API · MCPToolYour platform
Use DNS Lookup three ways
The free DNS Lookup on this page works in your browser. The same workflow is available via REST API for apps and via the remote MCP server for Cursor, Claude, and other agents — one API key, one plan, one quota. This tool is part of the security-apis module under Security Tools.
- 1Create a free accountGet an API key for REST and MCP — 500 credits/month on the free tier.
- 2Connect or callPaste the MCP URL into Cursor/Claude, or call REST with
X-Api-Key. - 3Same key & creditsBrowser smoke-checks stay free; API-backed runs share one monthly credit quota.
- Free in browserUse DNS Lookup here — no account required.
- REST APICall from your server with
X-Api-Key. - Remote MCP serverSame job from Cursor or Claude via the ToolYour remote MCP server — one API key with REST.
Which transport & DNS tools sit in this cluster?
Where does this job fit on ToolYour?
Which SEO or privacy tools pair with this security check?
Where do you browse more security tools tools?
- Security Tools tools
Browse the full Security Tools category on ToolYour.
- Developer Tools tools
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Which toolkits include DNS Lookup?
- Security Toolkit
HTTP security headers, TLS, cookies, CORS, redirects, DNS, secrets, JWT, passwords, hashes, HMAC, bcrypt, security.txt, SRI, and email auth — plus agent playbooks for full audits and ship gates.
- Developer Toolkit
JSON/XML/SQL formatters, encoders, UUID/timestamp/regex, JSON codegen, JWT minting, HTTP headers, request builders, cron, minifiers, and color conversion — plus security and text peers.