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Is DnsGuard reliable?

Reliable (measured) Yes. Faceabot measured DnsGuard 38 times: 100% of checks succeeded, including the last 38 in a row (last check 2026-10-19 20:45 UTC). It also does the job: its real read-only task worked 38 of 38 times.

Last check: 2026-10-19 20:45 UTC · answered in 7904 ms · remote (no install)

En français : Fiable (mesuré). Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

Check a domain's email authentication: SPF, DKIM, DMARC, BIMI, MX, MTA-STS, TLS-RPT. Score + fixes.

Source: official MCP registry (registry.modelcontextprotocol.io) · version 0.9.0 · publisher website
Connect your agent
{
  "mcpServers": {
    "dnsguard": {
      "url": "https://dnsguard.mike-tusa.workers.dev/mcp"
    }
  }
}
Or ask Faceabot first: MCP tool check_reliability {"id":"dev.workers.mike-tusa.dnsguard/dnsguard"} on https://faceabot.com/api/mcp.
Does it actually do the job?

Does the job (tested) — Faceabot asked check_domain to do a small read-only task 38 time(s): 38 returned a real result, the last 38 in a row. Last result: ok in 1965 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.
Other proven tools for the same job

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

Dmarc Spf Audit Reliable (measured) · 100%
Complete domain email-auth audit in one call: SPF with RFC 7208 lookup counting, DKIM selector pr... · https://dmarc-spf-audit.david-cyr.workers.dev/mcp

InboxGuards Email Check Reliable (measured) · 100%
Check emails before you send, and get a $1 SPF/DKIM/DMARC fix plan for your domain. Pay per call. · https://api.inboxguardstest.com/mcp

Picked from Faceabot's live measurements. Or let Faceabot choose: GET https://faceabot.com/resolve?need=…
Faceabot measurements
WhenAnswersReal taskLatency
2026-10-19 20:45 UTC✅ ok✅ done7904 ms
2026-10-19 07:55 UTC✅ ok✅ done4835 ms
2026-10-18 15:15 UTC✅ ok✅ done6439 ms
2026-10-18 04:35 UTC✅ ok✅ done4010 ms
2026-10-17 20:35 UTC✅ ok✅ done4462 ms
2026-10-17 12:10 UTC✅ ok✅ done5495 ms
2026-10-17 04:30 UTC✅ ok✅ done5328 ms
2026-10-16 20:50 UTC✅ ok✅ done4082 ms
2026-10-16 13:40 UTC✅ ok✅ done5046 ms
2026-10-16 06:40 UTC✅ ok✅ done6925 ms
2026-10-15 23:50 UTC✅ ok✅ done4169 ms
2026-10-15 16:51 UTC✅ ok✅ done6608 ms
2026-10-15 10:11 UTC✅ ok✅ done4726 ms
2026-10-15 03:40 UTC✅ ok✅ done3002 ms
2026-10-14 21:15 UTC✅ ok✅ done4732 ms
2026-10-14 14:45 UTC✅ ok✅ done4100 ms
2026-10-14 08:20 UTC✅ ok✅ done2044 ms
2026-10-14 01:31 UTC✅ ok✅ done8460 ms
2026-10-13 19:25 UTC✅ ok✅ done8627 ms
2026-10-13 13:20 UTC✅ ok✅ done8014 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.

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Publisher of DnsGuard?

Show your measured reliability on your README or website:

Faceabot reliability badge for DnsGuard

[![Measured by Faceabot](https://faceabot.com/badge/dev.workers.mike-tusa.dnsguard/dnsguard.svg)](https://faceabot.com/tools/dev.workers.mike-tusa.dnsguard/dnsguard)
Data in JSON: /api/catalog?id=dev.workers.mike-tusa.dnsguard/dnsguard · Stop probes: POST /api/reliability/opt-out

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