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DMARC Shark — Email DNS Checker

by dmarcshark.com · remote · no sign-in to list tools · v1.0.0 · published by com.dmarcshark

Check a domain's public SPF, DMARC, MX and DKIM DNS records on demand. No account required.

Changes · 1
CompareRegistry entry

2 tools: 1 change things and 1 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http email-dns-checker https://dmarcshark.com/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

2 tools

Changes things 1Claude Code: ask
  • check_domainRuns fresh, bounded public SPF, DMARC, MX and optionally specified DKIM-selector DNS checks.No findings

    Why it is in this group

    • The description's first verb is "run": a word for a change.
    Description, as the server wrote it
    Runs fresh, bounded public SPF, DMARC, MX and optionally specified DKIM-selector DNS checks. Changes the public saved snapshot. Rate limited. DNS findings do not prove message authentication.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
    • readOnlyHint: false
Only reads 1Claude Code: allow
  • get_saved_resultReads the last saved, timestamped public snapshot without making any DNS queries.No findings

    Why it is in this group

    • The name "get_saved_result" says "get": a word for reading.
    Description, as the server wrote it
    Reads the last saved, timestamped public snapshot without making any DNS queries. Results expire after 90 days.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
    • readOnlyHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http email-dns-checker https://dmarcshark.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__email-dns-checker__get_saved_result"
    ],
    "ask": [
      "mcp__email-dns-checker__check_domain"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as email-dns-checker. Review it before you use it.