What are reliable alternatives to DMARC Shark — Email DNS Checker?

Measured by Faceabot as working: deliverability-doctor, Domain Health, Email Auth Checker.

How do I connect an AI agent to DMARC Shark — Email DNS Checker?

Use the MCP streamable HTTP endpoint https://dmarcshark.com/mcp.

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Is DMARC Shark — Email DNS Checker reliable?

Being measured Measurement in progress: 2 check(s) so far. A verdict needs at least 3 checks.

Last check: 2026-10-19 15:10 UTC · answered in 10574 ms · remote (no install)

Proven alternatives that work right now

deliverability-doctor Reliable (measured) · 100%
Check if a domain can be email-spoofed: SPF, DMARC, DKIM, MX graded from public DNS. Authless. · https://deliverability-doctor.deliverability-doctor.workers.dev/mcp

Domain Health Reliable (measured) · 100%
Domain checks: SPF, DKIM, DMARC, BIMI, MTA-STS, SSL/TLS and HTTP security headers. · https://mcp.modernmustardseed.com/domain-health

Email Auth Checker Reliable (measured) · 100%
SPF, DKIM, DMARC, MTA-STS and domain-expiry checks for any domain, with SPF lookup counts. · https://email-auth-check.quietworklabs.workers.dev/mcp

Picked from Faceabot's live measurements. Or let Faceabot choose: GET https://faceabot.com/resolve?need=…

En français : Mesure en cours. Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

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

Source: official MCP registry (registry.modelcontextprotocol.io) · version 1.0.0 · publisher website

Connect your agent

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

Or ask Faceabot first: MCP tool check_reliability {"id":"com.dmarcshark/email-dns-checker"} on https://faceabot.com/api/mcp.

Does it actually do the job?

Real task being tested — Faceabot asked get_saved_result to do a small read-only task 2 time(s): 0 returned a real result. Last result: tool_error (the tool answered with an error for the neutral sample input) in 3975 ms.

Sample input: {"domain":"example.com"}. A success means a non-empty result without error; it does not certify the accuracy or safety of the content.

Faceabot measurements

When	Answers	Real task	Latency
2026-10-19 15:10 UTC	✅ ok	❌ tool_error	10574 ms
2026-10-19 00:00 UTC	✅ ok	❌ tool_error	8213 ms

Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

Publisher of DMARC Shark — Email DNS Checker?

Show your measured reliability on your README or website:

[![Measured by Faceabot](https://faceabot.com/badge/com.dmarcshark/email-dns-checker.svg)](https://faceabot.com/tools/com.dmarcshark/email-dns-checker)

Data in JSON: /api/catalog?id=com.dmarcshark/email-dns-checker · Stop probes: POST /api/reliability/opt-out

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