GET who.is HTTP 200133 ms2.8 KB$0.000064 captured Aug 7, 2026
who.is, as data
One API turns any who.is page into markdown, structured JSON, its link graph or a screenshot, and crawls the whole site the same way. The panel shows the real response we captured.
- Render mode
- Plain HTTP, no browser needed
- Response
- HTTP 200 in 133 ms
- Page size
- 2.8 KB of markdown, 55 lines
- Fields
- Ads, Ip Address, Search Button, Search Input
- Captured
- Aug 7, 2026
Free balance on signup, no card. This who.is page cost $0.000064 to fetch.
Instantly look up registration data, contact details, nameservers, DNS records, and more for any domain name or IP address using WHOIS and RDAP protocols.## WHOIS Lookup Registrant, registrar, and registration dates for any domain.## RDAP Lookup Structured registration data via the modern WHOIS successor.## DNS Records A, AAAA, MX, TXT, NS and other records for any domain.## Nameserver Lookup See which domains a given nameserver hosts.## IP Address Lookup Ownership and network data for any IPv4 or IPv6 address.## Domain History How much historical WHOIS/RDAP we hold for a domain.## Uptime Check Check whether a website is reachable right now.## Registrars Browse domain registrars and the domains they manage.## Our Premium ServicesFor researchers, investigators, and site owners who need more.### Domain History ReportThe complete historical WHOIS/RDAP record for a single domain — every snapshot, the ownership-change timeline, and registrar history, delivered as a downloadable report.### Pro Website MonitoringWatch the domains that matter: uptime, DNS changes, and TLS-certificate expiry, all from one setup. We probe each domain live so you see exactly what we see, then notify you the moment a site goes down, its DNS shifts, or its certificate nears expiry. Up to 10 domains.### Pro API AccessParsed WHOIS, normalized RDAP, and DNS and TLS-certificate history for any domain as JSON over HTTPS. Start on the free tier, no card required.## What is WHOIS?WHOIS is a widely used internet protocol to query databases storing information about registered users of domain names, IP addresses, and autonomous systems. It helps you find owner contact details, registration dates, and nameserver information.## What is RDAP?What Spider does on who.is
Same key, five endpoints. The numbers under a cell were measured on this page.
Page to markdown
Clean text for RAG and LLM context, boilerplate removed. The lane that runs without a key.
133 ms · $0.000064Page to JSON
Spider reads the page and names the fields. Pass your own schema when you need exact keys.
Rendered capture
Real Chromium, full-page PNG. The same call also returns the rendered HTML.
The call behind the panel
This request produced the response above. Paste it with your key and you get the same bytes.
curl -X POST https://api.spider.cloud/scrape \
-H "Authorization: Bearer $SPIDER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"url": "https://who.is/", "return_format": "markdown"}'from spider import Spider
app = Spider()
params = {"return_format": "markdown"}
page = app.scrape_url("https://who.is/", params=params)
print(page[0]["content"])import { Spider } from "@spider-cloud/spider-client";
const app = new Spider();
const [page] = await app.scrapeUrl("https://who.is/", {
return_format: "markdown",
});
console.log(page.content);What who.is costs
Multiplied from the measured 2.8 KB page. Estimates round to the cent.
1 GB of transfer costs $1, plus $0.001 per CPU minute, and failed requests cost $0. Crawling daily? The Unlimited plan is a flat monthly rate.
Point this at the rest of who.is.
The capture above took 133 ms and cost $0.000064. The same call takes any URL on who.is.