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API · /dns-api

DNS Lookup API

healthy 3,545 Subscribers

Resolve DNS records — A, AAAA, MX, NS, TXT, CNAME, SOA, SRV, CAA, PTR — for any domain, fetch all common records in a single call, or run a reverse PTR lookup for an IPv4 address. Backed by Google DNS-over-HTTPS. Ideal for devops tooling, uptime and email-deliverability checks (SPF/DKIM/DMARC), security research and domain monitoring.

#dns #dns-lookup #mx #txt #reverse-dns #devops #security
api.oanor.com/dns-api
Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

/api/dns-api/openapi.json
/api/dns-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
873 ms
Server probes · 24h
Subscribers
3,545
active
Total calls
96
last 7 days
status Full status page → · 96 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 1,500 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,500 lookups/month at 2 rps
  • A, AAAA, MX, NS, TXT, CNAME records
  • No credit card
  • Community support
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Basic

€12.00 /month

  • 120,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 120,000 lookups/month at 8 rps
  • All record types incl. SOA, SRV, CAA, PTR
  • Reverse PTR + fetch-all-records endpoints
  • Commercial use allowed
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Pro

€34.00 /month

  • 600,000 calls / month
  • 25 requests / second
  • Hard cap (429 above quota, no overage)
  • 600,000 lookups/month at 25 rps
  • Full record set + reverse DNS
  • Bulk multi-domain resolution
  • Priority email support
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Mega

€89.00 /month

  • 2,500,000 calls / month
  • 80 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,500,000 lookups/month at 80 rps
  • 99.9% uptime SLA
  • Priority queue + dedicated support
  • Highest rate limits for monitoring fleets
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Built by

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PremiumApi

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api.oanor.com/domain-api

WHOIS API

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api.oanor.com/whois-api

Email Validation API

Verify email addresses without sending anything: RFC syntax validation, live MX-record lookup, disposable/throwaway detection (5,500+ domain blocklist), role-account and free-provider flags, "did you mean" typo suggestion, and a 0–100 deliverability score.

api.oanor.com/email-api

YAML API

Convert, validate and tidy YAML through a fast, fully-local API. Turn YAML into JSON (including multi-document streams) or JSON into clean YAML with optional key sorting and custom indentation, validate a document and get the exact line and column of any syntax error with a context snippet, or reformat and normalize existing YAML. Inputs can be sent as a raw text/plain body, a JSON field or a query parameter; outputs are tidy JSON. Pure server-side compute with no third-party upstream, so responses are instant and the service is always available. Ideal for DevOps and CI/CD, configuration and infrastructure-as-code tooling, no-code platforms, editors and data pipelines.

api.oanor.com/yaml-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for DNS Lookup API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call DNS Lookup API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for DNS Lookup API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does DNS Lookup API cost?
DNS Lookup API has a free tier with 100 calls / month. Paid plans start at €12.00 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is DNS Lookup API GDPR-compliant?
All requests to DNS Lookup API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/dns-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/dns-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/dns-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/dns-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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