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API · /dnspropagation-api

DNS Propagation API

healthy 4,515 Subscribers

Check DNS propagation by querying a record across several major public resolvers at once — Google (8.8.8.8), Cloudflare (1.1.1.1), AdGuard and dns.sb — and seeing whether they all return the same answer. Pass a domain and a record type and the service queries every resolver in parallel and reports each resolver's answers, whether they are consistent (the change has fully propagated) or still differ (mid-propagation, stale caching or split-horizon DNS), the number of distinct answer sets and the union of all answers. Supported record types: A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, CAA and PTR. A single-resolver endpoint queries one named resolver on its own, and a failing resolver is reported per-resolver without failing the whole call. Live DoH (DNS-over-HTTPS) JSON queries, always current. Built for verifying DNS changes after a migration or launch, debugging split-horizon or stale-cache issues, and uptime/propagation monitoring. A DNS propagation checker — distinct from single-resolver record lookup (dns), the email-authentication analyzer (emailsec) and WHOIS (whois). No upstream key, no cache.

#dns #propagation #doh #networking #devops #monitoring
api.oanor.com/dnspropagation-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
116 ms
Server probes · 24h
Subscribers
4,515
active
Total calls
0
last 7 days
status Full status page → · 3 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,200 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,200 calls/month
  • 2 req/sec
  • 4 resolvers, 10 record types
  • No credit card
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Starter

€6.45 /month

  • 43,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 43k calls/month
  • 8 req/sec
  • Consistency + per-resolver
  • Email support
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Pro

€20.80 /month

  • 224,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 224k calls/month
  • 20 req/sec
  • Migration & launch checks
  • Priority support
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Mega

€54.30 /month

  • 840,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 840k calls/month
  • 50 req/sec
  • DNS-monitoring scale
  • Dedicated SLA
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Related APIs

Other APIs with overlapping tags.

MTA-STS API

Inspect a domain's SMTP transport-security posture — whether mail servers are required to deliver inbound mail over authenticated TLS, protecting it from downgrade and man-in-the-middle attacks. Pass a domain and the service fetches the MTA-STS policy file from mta-sts.<domain>/.well-known/mta-sts.txt (its version, mode, the permitted MX hosts and max_age), the _mta-sts DNS TXT record (its policy id) and the _smtp._tls TLS-RPT record (the rua reporting address), then reports whether MTA-STS is actually enforced and a prioritised list of issues — no policy file, no DNS record, a mode of only "testing", or a missing TLS-RPT record. A second endpoint returns just the parsed policy file. The request is made server-side and private/internal targets are refused (SSRF-guarded). Built for email-deliverability and anti-downgrade-attack audits, vendor and third-party assessment, and compliance. An MTA-STS / TLS-RPT checker — the SMTP transport-security counterpart to the email-authentication analyzer (emailsec, which covers SPF, DKIM and DMARC), and distinct from raw DNS lookup (dns). No upstream key, no cache.

api.oanor.com/mtasts-api

Email Security API

Inspect any domain's email-authentication posture — its protection against spoofing and phishing — via live DNS. Pass a domain and the service looks up and validates SPF (the v=spf1 record, its all-qualifier and the 10-lookup limit), DMARC (the _dmarc policy p=none/quarantine/reject, plus sp, pct and rua/ruf reporting addresses), DKIM (probing the common selectors at selector._domainkey, or pass your own), BIMI and the MX servers — then returns an A+-to-F grade with a prioritised list of issues and concrete advice. A second endpoint parses the DMARC record tag by tag with a plain-English interpretation of the policy. Built for email-deliverability and anti-spoofing audits, vendor and third-party risk assessment, security onboarding and continuous monitoring. An email-authentication analyzer — distinct from mailbox/address validation (email), raw DNS record lookup (dns) and the HTTP security-header grader (secheaders). Pure live DNS, no upstream key, no cache.

api.oanor.com/emailsec-api

Domain Parser API

Parse any hostname or URL with the Public Suffix List. Split a domain into its subdomain, registrable domain (eTLD+1) and public suffix (eTLD), or fetch just the suffix or just the registrable domain. Handles full URLs, internationalized (punycode) domains, IP addresses, multi-level suffixes like co.uk and com.au, and — when you ask for it — private suffixes such as github.io and s3 buckets. Built on an always-current Public Suffix List and served entirely in-memory, so responses are instant and the service is always available. Ideal for cookie and domain scoping, analytics attribution, email and link validation, security and anti-abuse, and devops tooling.

api.oanor.com/domain-api

DNS Lookup API

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.

api.oanor.com/dns-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for DNS Propagation API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call DNS Propagation API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for DNS Propagation 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 Propagation API cost?
DNS Propagation API has a free tier with 100 calls / month. Paid plans start at €6.45 / 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 Propagation API GDPR-compliant?
All requests to DNS Propagation 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/dnspropagation-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/dnspropagation-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/dnspropagation-api/SOME_PATH");
curl_setopt($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/dnspropagation-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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