Use DomainDNA MCP with Cursor

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

Remote MCP server (Streamable HTTP), nothing to install. Free: 25 free domains/day · Paid: $5 pack; $19/mo

Set it up

Open or create the mcp.json file (global or per project).
Add the server under "mcpServers" as shown and save.
Open Cursor's settings, find the MCP section and check that the server is enabled and lists its tools.
Ask the agent a question the tools can answer and approve the tool call.

Add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "domaindna-api": {
      "url": "https://domaindna-api.cybermaxtools.com/mcp?via=use-with-cursor"
    }
  }
}

With a paid key:

{
  "mcpServers": {
    "domaindna-api": {
      "url": "https://domaindna-api.cybermaxtools.com/mcp?via=use-with-cursor",
      "headers": {
        "x-api-key": "${env:CYBERMAX_API_KEY}"
      }
    }
  }
}

Cursor fills ${env:CYBERMAX_API_KEY} from your environment, so the key never sits in the file.

Where it goes:

~/.cursor/mcp.json (every project)
.cursor/mcp.json (this project only)

Config format checked 2026-10-09 against Cursor's MCP documentation.

Tools you get

Endpoint checked 2026-10-09: https://domaindna-api.cybermaxtools.com/mcp answered an MCP initialize (protocol 2025-06-18) and tools/list with 4 tools, all marked read-only. No key was used and no tool was called.

Tool	What it does	Required inputs
`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.	`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.	`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.	`domains`
`domain_registration`	RDAP registration (registrar, created, updated, expires, age in days, status) for 1-10 domains.	`domains`

Test the endpoint from a terminal

This lists the tools without a key and without calling any of them:

curl -s https://domaindna-api.cybermaxtools.com/mcp \
  -H 'content-type: application/json' \
  -H 'accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

If it does not work

Cursor uses the top-level key "mcpServers" (VS Code uses "servers"); a file copied from VS Code will not load.
After editing the file, toggle the server off and on in settings if the tools do not appear.
The free tier has a daily limit (see the pricing line above); a paid key raises it.

DomainDNA in other clients

VS Code (GitHub Copilot)Claude Code Claude Desktop and claude.ai Windsurf (Devin Desktop)Cline OpenAI Codex CLI Gemini CLI

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