# How (how.is)

Returns DNS, WHOIS, TLS, DNSSEC, email auth, blacklist and uptime checks for a domain via card-paid API or per-request USDC payments.

- Atlas card: https://inite.ai/en/atlas/how.is
- Site: https://how.is
- For: Developers and AI agents needing domain checks via API, MCP, or per-request payment.
- Categories: dev
- Use not measured/100 · alive 100/100

## Used for

- check a domain's DNS, WHOIS, TLS and email auth records
- look up whether a domain is blacklisted or recently registered
- monitor a page for changes since the last snapshot

## Price

Not read yet.

## For developers

- OpenAPI: https://how.is/openapi.json (16 paths)
- API docs: https://how.is/v1
- MCP server: is.how/domain-intel (namespace; open on 2026-10-20, 16 tools)
- Read 2026-10-20

## MCP server, measured daily

Server: https://how.is/mcp, checked every day since 2026-10-20 (8 checks).

- Answered: 100% of daily checks
- Median first answer: 180 ms
- Sign-in: none
- Context its tool definitions take: about 2229 tokens (17 tools)
- Tool definitions: A, 100/100
- Warning "open_writes": add_credit
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-20

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