DMARC Shark — Email DNS Checker MCP Server

by dmarcshark Your server? Claim it

answering

DMARC Shark — Email DNS Checker is answering right now. Last checked 11 min ago. It exposes 2 tools.

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

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 7 days of history

7 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

173 ms

Response time

average over 24h

open, no key

Access

streamable-http

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

Settings → Connectors → Add custom connector, then paste this address

https://dmarcshark.com/mcp

~/.codex/config.toml

[mcp_servers.email-dns-checker]
url = "https://dmarcshark.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "email-dns-checker": {
      "url": "https://dmarcshark.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "email-dns-checker": {
      "type": "http",
      "url": "https://dmarcshark.com/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

domain

check_domain

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.

saved

get_saved_result

Reads the last saved, timestamped public snapshot without making any DNS queries. Results expire after 90 days.

Endpoints

URL	Transport	State	Latency	Checked
https://dmarcshark.com/mcp	streamable-http	answering	170 ms	11 min ago

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DMARC Shark — Email DNS Checker — questions

Answers built from our own checks of this server.

What can DMARC Shark — Email DNS Checker do?

It exposes 2 tools, read directly from the server on our last check. Among them: check_domain, get_saved_result. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is DMARC Shark — Email DNS Checker working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 173 ms. The bar chart above shows every period we have measured.

Is DMARC Shark — Email DNS Checker still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect DMARC Shark — Email DNS Checker?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does DMARC Shark — Email DNS Checker need an API key?

No. DMARC Shark — Email DNS Checker completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is DMARC Shark — Email DNS Checker?

It answers our handshake in 173 ms on average, which is faster than 84% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.