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Quiet Failures

by quietfailures.com · remote · no sign-in to list tools · v1.4.8 · published by com.quietfailures

Open weekly security base rates (CC BY 4.0), plus live DMARC, takeover and WHOIS checks.

Changes · 3
CompareRegistry entry

6 tools: 3 change things and 3 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 quiet-failures https://mcp.quietfailures.com/mcp

Tools

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

6 tools

Changes things 3Claude Code: ask
  • check_email_authLive SPF, DKIM and DMARC audit of up to 50 domains the user owns or asks about.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Live SPF, DKIM and DMARC audit of up to 50 domains the user owns or asks about. Returns a per-domain breakdown plus a portfolio grade. Compare against the base rates: most of the web fails these controls. Rate-limited per client.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
  • check_subdomain_takeoverLive scan of one domain: enumerate its subdomains (CT logs + DNS), then test each for dangling references on 13 cloud providers.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Live scan of one domain: enumerate its subdomains (CT logs + DNS), then test each for dangling references on 13 cloud providers. Slow on large domains (up to a few minutes). Rate-limited per client.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
  • check_whoisLive WHOIS lookup for up to 100 domains: expiry date, registrar, nameservers.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Live WHOIS lookup for up to 100 domains: expiry date, registrar, nameservers. Use to catch registrations about to lapse. Rate-limited per client.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
Only reads 3Claude Code: allow
  • find_base_rateSearch the Quiet Failures base rates by keyword (e.g.No findings

    Why it is in this group

    • The name "find_base_rate" says "find": a word for reading.
    Description, as the server wrote it
    Search the Quiet Failures base rates by keyword (e.g. "dmarc", "certificate expiry uk", "subdomain takeover"). Returns matching metrics and their most citable segments.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • get_base_rateFull detail for one Quiet Failures base rate segment: the figure with confidence interval, how it is measured, why it matters, the limits of the measurement, the recent time series…No findings

    Why it is in this group

    • The name "get_base_rate" says "get": a word for reading.
    Description, as the server wrote it
    Full detail for one Quiet Failures base rate segment: the figure with confidence interval, how it is measured, why it matters, the limits of the measurement, the recent time series, and the canonical source URL to cite. Segment defaults to "global"; country slugs (gb, fr, us…) and company cuts (gb-companies, gb-small…) are also published.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • list_base_ratesCatalog of all published Quiet Failures base rates: metric id, the global question, the current global figure, sample size, severity, and every published segment slug (valid `segme…No findings

    Why it is in this group

    • The name "list_base_rates" says "list": a word for reading.
    Description, as the server wrote it
    Catalog of all published Quiet Failures base rates: metric id, the global question, the current global figure, sample size, severity, and every published segment slug (valid `segment` values for get_base_rate). Use get_base_rate for full detail on one.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false

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 1.4.8. Values in angle brackets are yours to fill in.

claude mcp add --transport http quiet-failures https://mcp.quietfailures.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__quiet-failures__list_base_rates",
      "mcp__quiet-failures__find_base_rate",
      "mcp__quiet-failures__get_base_rate"
    ],
    "ask": [
      "mcp__quiet-failures__check_email_auth",
      "mcp__quiet-failures__check_subdomain_takeover",
      "mcp__quiet-failures__check_whois"
    ],
    "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 quiet-failures. Review it before you use it.