# WHOIS Search, Domain Name, Website, and IP Tools (who.is)

Looks up WHOIS and RDAP registration data, DNS records, nameservers and domain history for any domain or IP address.

- Atlas card: https://inite.ai/en/atlas/who.is
- Site: https://who.is
- For: Domain owners, researchers and investigators looking up domain registration and DNS data
- Use not measured/100 · alive 100/100

## Used for

- Look up registration and contact data for a domain
- Monitor domains for downtime, DNS changes and certificate expiry

## Price

Not read yet.

## For developers

- API docs: https://who.is/docs/api
- MCP server: is.who/whois (namespace; auth on 2026-10-23)
- Read 2026-10-23

## MCP server, measured daily

Server: https://api.who.is/v1/mcp, checked every day since 2026-10-23 (12 checks).

- Answered: 100% of daily checks
- Median first answer: 308 ms
- Sign-in: a pasted key
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-23

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Source: INITE Atlas, https://inite.ai/en/atlas/who.is. JSON: https://inite.ai/api/atlas/who.is. MCP: https://inite.ai/api/mcp (atlas_lookup).