DNS & WHOIS Lookup
Look up all 13 DNS record types plus full WHOIS registration data for up to 10 domains in one call. Send up to 10 domain names and get back every DNS record type (A, AAAA, MX, CNAME, TXT, NS, PTR, SOA, SRV, CAA, NAPTR, DS, TLSA) plus the full WHOIS registration profile (registrar, dates, contacts, status, nameservers) for each one. URLs are accepted and automatically stripped down to the bare domain. Duplicate domains are quietly removed before processing. Results come back as one flat row per domain, ready to drop into a spreadsheet, database, or pipeline. Pay-per-call at $0.01 USDC over x402 on Base or Solana — no account, no API key. OpenAPI 3.1.0; 1 operation(s): POST /lookup.
This API exposes 1 operation across 1 path, and defines 5 schemas. It is described by OpenAPI 3.1.0, at version 1.0.0.
Requests are made against a single base URL, https://dns-whois-lookup.underscoredone.com.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
DNS & WHOIS Lookup declares
1 security scheme
for authenticating requests.
An API key is passed in the header as SIGN-IN-WITH-X (siwx).
siwx— CAIP-122 wallet signature for repeat access after payment
Paths & Operations 1
Across 1 path, the API surfaces 1 operation — 1 POST. Each is listed below with its method, path, parameters, and response codes.
Schemas 5
The contract defines 5 schemas that model the data the API accepts and returns. The most detailed are DomainResult (34 properties), ValidationError (5 properties), Response (2 properties), Request (1 property). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
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