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How

Returns DNS, WHOIS, TLS, DNSSEC, email auth, blacklist and uptime checks for a domain via card-paid API or per-request USDC payments.
Developer toolsFor developersUsage-based pricing
how.is ↗
Open how.isAlternativesSet it up for my teamIs How yours? Claim the card →
At a glanceswept Oct 19, 2026

≈ 31visits/mo

Use not read yet · estimate, read Oct 20, 2026

For
Developers and AI agents needing domain checks via API, MCP, or per-request payment.
Runs as
API
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
Worth knowingcomputed from what we read · each with its source
  • On the web since 2006, older than 98% of its shelfINITE Atlas
  • Has an MCP server (1 in the registry)public registry →
  • Publishes llms.txt, a file written for AI assistantshow.is ↗
How a program reaches itfound, not claimed · read Oct 20, 2026
  • MCP serveris.how/domain-intelverified in the MCP registry
  • Stateanswers, 16 toolschecked 2026-10-20
  • Address to connecthow.is/mcp
  • OpenAPI spec16 pathsthe spec ↗
  • API docshow.is/v1the vendor's page ↗

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Developer toolsby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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Questions this page answers
  • What is How?

    Returns DNS, WHOIS, TLS, DNSSEC, email auth, blacklist and uptime checks for a domain via card-paid API or per-request USDC payments. It is listed in the Atlas under Developer tools.

  • Who is How for?

    Developers and AI agents needing domain checks via API, MCP, or per-request payment.

  • What are alternatives to How?

    In Developer tools, by use: Balou Tools, Cobytes.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk