Use DomainDNA MCP with Cline

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

Click the MCP Servers icon in Cline's toolbar, open Configure and click Configure MCP Servers.
Add the server under "mcpServers" with "type": "streamableHttp" and save.
Check that the server is enabled and lists its tools.
Every tool here is read-only, so you can add tool names to "autoApprove" if you want Cline to run them without asking.

Add to cline_mcp_settings.json::

{
  "mcpServers": {
    "domaindna-api": {
      "type": "streamableHttp",
      "url": "https://domaindna-api.cybermaxtools.com/mcp?via=use-with-cline",
      "disabled": false,
      "autoApprove": []
    }
  }
}

With a paid key:

{
  "mcpServers": {
    "domaindna-api": {
      "type": "streamableHttp",
      "url": "https://domaindna-api.cybermaxtools.com/mcp?via=use-with-cline",
      "headers": {
        "x-api-key": "YOUR_KEY"
      },
      "disabled": false,
      "autoApprove": []
    }
  }
}

The settings file is local to your machine; do not paste it into a shared repository with the key in it.

Where it goes:

cline_mcp_settings.json: in the IDE, click the MCP Servers icon › Configure › Configure MCP Servers
CLI: ~/.cline/data/settings/cline_mcp_settings.json

Config format checked 2026-10-09 against Cline'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

The field is "type" (not "transportType") and the approval list is "autoApprove".
Set "type": "streamableHttp" explicitly; "sse" is the legacy transport.
The free tier has a daily limit (see the pricing line above); a paid key raises it.

DomainDNA in other clients

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