MCP server

Domain Health

com.modernmustardseed/domain-health

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Domain checks: SPF, DKIM, DMARC, BIMI, MTA-STS, SSL/TLS and HTTP security headers.

Website

At a glance

Type

MCP server

Publisher

modernmustardseed.com (verified by the MCP Registry)

Status

Working at last check

Tools

5

Token cost

About 1,704 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http domain-health https://mcp.modernmustardseed.com/domain-health

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.domain-health]
url = "https://mcp.modernmustardseed.com/domain-health"

Gemini CLI

{"mcpServers":{"domain-health":{"httpUrl":"https://mcp.modernmustardseed.com/domain-health"}}}

Cursor

{"mcpServers":{"domain-health":{"url":"https://mcp.modernmustardseed.com/domain-health"}}}

VS Code

{"servers":{"domain-health":{"type":"http","url":"https://mcp.modernmustardseed.com/domain-health"}}}

Antigravity

agy mcp add domain-health https://mcp.modernmustardseed.com/domain-health

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"domain-health","server_url":"https://mcp.modernmustardseed.com/domain-health","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"domain-health","server_url":"https://mcp.modernmustardseed.com/domain-health"}

Tools

• check_domain_registration ~305 tokens
  Read a domain's public registration record from its registry over RDAP (no WHOIS scraping): registrar, creation, expiry and last-change dates, status locks such as clientTransferProhibited, danger states such as redemption period or hold, and nameservers. Also compares the registry's nameservers wit
• check_email_auth ~403 tokens
  Explain in plain words whether email from a domain will reach the inbox and whether others can forge it. Checks MX, SPF with every include expanded and counted against the 10-lookup limit, DMARC policy, alignment and report permissions, DKIM keys at about 40 common selectors plus any you name (with
• check_security_headers ~298 tokens
  Read the HTTP security headers a domain's homepage sends, as a browser receives them, and grade each: Strict-Transport-Security, Content-Security-Policy, clickjacking protection (X-Frame-Options or CSP frame-ancestors), X-Content-Type-Options, Referrer-Policy and Permissions-Policy, plus whether htt
• check_ssl ~331 tokens
  Check the HTTPS certificate and TLS setup of a domain on port 443: issuer, expiry date and days left, whether the chain is complete and trusted, whether the certificate matches the name, key type and size, which TLS versions (1.0 to 1.3) the server accepts, and the CAA record that limits who may iss
• full_domain_report ~367 tokens
  Run every Domain Health check on one domain at once (email authentication, SSL and TLS, security headers, registration and DNSSEC) and answer three questions in plain words: will its email land, is its website safe, and is the domain owned well. Returns a score and grade per area, the top fixes acro

Browse

• Microsoft tools
• Web scraping
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• Domains and DNS
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