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DnsGuard

R0· no sign-in

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

v0.9.0 · active · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality100strong
Trust83of 100
Uptime, 30 days100%
Latency p50153 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "dnsguard": {
      "type": "http",
      "url": "https://dnsguard.mike-tusa.workers.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${DNSGUARD_TOKEN}"
      }
    }
  }
}
claude mcp add --transport http dnsguard https://dnsguard.mike-tusa.workers.dev/mcp --header "Authorization: Bearer ${DNSGUARD_TOKEN}"
[mcp_servers.dnsguard]
url = "https://dnsguard.mike-tusa.workers.dev/mcp"
bearer_token_env_var = "DNSGUARD_TOKEN"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dnsguard": {
      "type": "remote",
      "url": "https://dnsguard.mike-tusa.workers.dev/mcp",
      "enabled": true,
      "headers": {
        "Authorization": "Bearer {env:DNSGUARD_TOKEN}"
      }
    }
  }
}
{
  "mcpServers": {
    "dnsguard": {
      "type": "http",
      "url": "https://dnsguard.mike-tusa.workers.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${DNSGUARD_TOKEN}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=dnsguard&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vZG5zZ3VhcmQubWlrZS10dXNhLndvcmtlcnMuZGV2L21jcCIsImhlYWRlcnMiOnsiQXV0aG9yaXphdGlvbiI6IkJlYXJlciAke0ROU0dVQVJEX1RPS0VOfSJ9fQ%3D%3D"
}
{
  "servers": {
    "dnsguard": {
      "type": "http",
      "url": "https://dnsguard.mike-tusa.workers.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${DNSGUARD_TOKEN}"
      }
    }
  }
}
{
  "mcpServers": {
    "dnsguard": {
      "httpUrl": "https://dnsguard.mike-tusa.workers.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${DNSGUARD_TOKEN}"
      }
    }
  }
}
extensions:
  "dnsguard":
    enabled: true
    name: "dnsguard"
    type: streamable_http
    uri: "https://dnsguard.mike-tusa.workers.dev/mcp"
    headers:
      "Authorization": "Bearer ${DNSGUARD_TOKEN}"
    timeout: 300

Placeholders to fill from your own secret store: ${DNSGUARD_TOKEN}. The registry never accepts secret values.

Quality 100 / 100strong

protocol100 · weight 25
  • pass
    protocol.modernsupports 2026-07-28 (server/discover)
  • pass
    protocol.statelessanswers without a session
  • pass
    protocol.transportstreamable HTTP
  • pass
    protocol.list_ttltool list is cacheable (ttlMs 3600000)
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene100 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • pass
    tools.description_lengthdescriptions are concise
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations1 of 1 tools declare readOnlyHint or destructiveHint
  • pass
    tools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
  • pass
    tools.token_costabout 303 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stability100 · weight 15
  • pass
    stability.changesno tool changes in 30 days
  • pass
    stability.rug_pullno tool changed its meaning under the same name
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

1 tools, about 303 tokens to load them all · tool set 6a8b62c5d2e2 · checked 2026-10-19 20:38 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 83 / 100

no-repository
provenance55
liveness100
freshness100
hygiene80

+dns-namespace +website +reachable +uptime-100% +updated-1d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://dnsguard.mike-tusa.workers.dev/mcp streamable-httpnoneyes100%153 ms2026-07-28, 2025-11-25, 2025-06-18, 2025-03-26, 2024-11-052026-10-19

Tools (1)

check_domainread-onlyAudit the email-authentication DNS records of a domain. Returns a 0–100 score and A–F grade (MX 10, SPF 25, DMARC 30, DKIM 25, BIMI 10, plus up to 5 bonus points for MTA-STS and TLS-RPT, capped at 100), each check's status, published record, findings and recommended fixes, and a link to the full report. Read-only: it only queries public DNS and the domain's public MTA-STS policy file. Same engine and scoring as the DnsGuard JSON API (GET /api/check).

Schemas: list_tools.

Similar MCP servers

Official server.json
{
  "name": "dev.workers.mike-tusa.dnsguard/dnsguard",
  "icons": [
    {
      "src": "https://dnsguard.mike-tusa.workers.dev/favicon.svg",
      "sizes": [
        "any"
      ],
      "mimeType": "image/svg+xml"
    }
  ],
  "title": "DnsGuard",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://dnsguard.mike-tusa.workers.dev/mcp",
      "type": "streamable-http",
      "headers": [
        {
          "name": "Authorization",
          "isSecret": true,
          "description": "Optional. 'Bearer dg_live_…' (free key, Google sign-in on the website) or 'Bearer DNSG-…' (DnsGuard Pro) for higher limits. Works without a key."
        }
      ]
    }
  ],
  "version": "0.9.0",
  "websiteUrl": "https://dnsguard.mike-tusa.workers.dev/",
  "description": "Check a domain's email authentication: SPF, DKIM, DMARC, BIMI, MX, MTA-STS, TLS-RPT. Score + fixes."
}