MCP server · CyberMax

DomainDNA MCP server

Tech stack, email security (SPF, DMARC, MX provider) and domain age API + MCP. 25 free domains/day.

Free: 25 free domains/dayPaid: $5 pack; $19/mo

Connect

Streamable HTTP endpoint: https://domaindna-api.cybermaxtools.com/mcp (the original https://domaindna-api.cybermax-tools.workers.dev/mcp keeps working). Add it to Claude Desktop, Cursor, Windsurf or VS Code:

{
  "mcpServers": {
    "domaindna-api": {
      "type": "http",
      "url": "https://domaindna-api.cybermaxtools.com/mcp"
    }
  }
}

No key needed for the free tier. For more calls, add your paid key as the x-api-key header. Full API docs: https://domaindna-api.cybermaxtools.com/docs · Product page: DomainDNA

Tools

Tool	What it does	Effect	Inputs (* required)
`domain_report`	Tech stack (with evidence), email provider, SPF, DMARC, DNS, RDAP registration (age, registrar, expiry), security headers and site files for one domain, URL or email.	read-only, calls public sources on the internet, never destructive	`domain`*
`email_security`	MX provider, SPF record and all qualifier, DMARC policy, pct and rua, A/AAAA/NS and TXT verifications for 1-5 domains.	read-only, calls public sources on the internet, never destructive	`domains`*
`tech_stack`	Technologies (CMS, e-commerce, frameworks, analytics, tag managers, CDN, chat...) with the evidence for each, plus security headers, for 1-3 websites.	read-only, calls public sources on the internet, never destructive	`domains`*
`domain_registration`	RDAP registration (registrar, created, updated, expires, age in days, status) for 1-10 domains.	read-only, calls public sources on the internet, never destructive	`domains`*

Security and data handling

Your tool arguments are used only to answer that call. They are not saved to a database, shared, sold or used for training.
To make repeat lookups fast, some servers keep the public answer to a lookup in Cloudflare's edge cache for up to 7 days (most for 1 hour or less). It holds the public result, not who asked.
Free tier: a per-day counter keyed by a SHA-256 hash of your IP address and the date (in a Cloudflare Durable Object). The raw IP is not stored.
Paid key: the key is checked with the payment provider (Stripe; Polar for older keys) and the result is cached for 10 minutes; usage is counted per key per month.
No accounts, cookies or tracking on the MCP endpoint. Errors may appear in Cloudflare's short-lived Worker logs.
Every tool is read-only: it looks up public data and returns it. No tool writes, deletes, sends messages or spends money.

Registry and source

Official MCP Registry: dev.workers.cybermax-tools.cybermax/domaindna-api, version 1.1.0.
Public manifest, tool schemas and security notes (MIT): gitlab.com/CyberMax.tools/agent-tools/mcp/domaindna-api. The hosted service code is not public.
Report a vulnerability: security policy.

← All CyberMax MCP servers