Free DNS Lookup API

curl -X POST https://dnsrobot.net/api/dns-query \
  -H "Content-Type: application/json" \
  -d '{"domain":"example.com","recordType":"A","dnsServer":"1.1.1.1"}'

{
  "status": "success",
  "responseTime": 4,
  "resolvedIPs": ["172.66.147.243", "104.20.23.154"],
  "dnsServer": "1.1.1.1",
  "recordType": "A",
  "domain": "example.com",
  "method": "dns-node",
  "debug": "Found 2 records"
}

POST https://dnsrobot.net/api/dns-query
Content-Type: application/json

{
  "status": "success",
  "resolvedIPs": [],
  "recordType": "DNSKEY",
  "domain": "spidyhost.com",
  "debug": "No records of this type exist for this domain",
  ...
}

{
  "status": "error",
  "responseTime": 7,
  "resolvedIPs": [],
  "errorMessage": "NXDOMAIN - Domain does not exist",
  "dnsServer": "8.8.8.8",
  "recordType": "A",
  "domain": "no-such-domain-dnsrobot-test.com",
  "method": "dns-node"
}

HTTP/1.1 400 Bad Request
{ "error": "Invalid input parameters", "details": "Invalid domain, SRV record, or IP address format" }

HTTP/1.1 429 Too Many Requests
Retry-After: 120
{ "error": "Rate limit exceeded", "details": "Max 600 requests per 10 minutes per IP. Retry after 120s." }

const res = await fetch("https://dnsrobot.net/api/dns-query", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({ domain: "gmail.com", recordType: "MX", dnsServer: "8.8.8.8" }),
})
const data = await res.json()
if (res.ok && data.status === "success") {
  console.log(data.resolvedIPs) // ["5 gmail-smtp-in.l.google.com", ...]
} else {
  console.error(data.errorMessage ?? data.details)
}

import requests

r = requests.post(
    "https://dnsrobot.net/api/dns-query",
    json={"domain": "example.com", "recordType": "TXT", "dnsServer": "9.9.9.9"},
    timeout=15,
)
data = r.json()
if r.ok and data["status"] == "success":
    for record in data["resolvedIPs"]:
        print(record)
else:
    print("Error:", data.get("errorMessage") or data.get("details"))

# Compare one record across several public resolvers (a mini propagation check)
for ns in 8.8.8.8 1.1.1.1 9.9.9.9 208.67.222.222; do
  curl -s -X POST https://dnsrobot.net/api/dns-query -H "Content-Type: application/json" \
    -d "{\"domain\":\"example.com\",\"recordType\":\"A\",\"dnsServer\":\"$ns\"}" \
    | jq -c '{dnsServer, resolvedIPs}'
done