Use DomainDNA MCP with Claude Desktop and claude.ai
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 Customize › Connectors (on Team and Enterprise, an owner adds it under Organization settings › Connectors).
- Click + Add, then Add custom connector.
- Name it DomainDNA and paste the server URL: https://domaindna-api.cybermaxtools.com/mcp?via=use-with-claude-desktop
- Under Authentication choose No sign in.
- For a paid key, add a request header named x-api-key with your key; leave it out for the free tier.
- Click Add, then enable the connector for your chat.
Claude stores fixed request headers encrypted. On Team and Enterprise plans everyone in the workspace shares that credential.
- no file: remote servers are added as custom connectors in Claude's settings
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
- Custom connectors connect from Anthropic's cloud, not your computer; our servers are public, so no allowlisting is needed.
- Free plans can add one custom connector.
- To change the URL or header, remove the connector and add it again.
- The free tier has a daily limit (see the pricing line above); a paid key raises it.
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