Quiet Failures is an MCP server with 6 tools an agent can call, among them check_email_auth, check_subdomain_takeover, check_whois. It answers at https://mcp.quietfailures.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 10 of 10 times since 5 September 2026; the last check, on 18 October 2026, succeeded.
Open weekly security base rates (CC BY 4.0), plus live DMARC, takeover and WHOIS checks.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
check_email_auth | 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. Inputs: domains |
check_subdomain_takeover | 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. Inputs: domain |
check_whois | Live WHOIS lookup for up to 100 domains: expiry date, registrar, nameservers. Use to catch registrations about to lapse. Rate-limited per client. Inputs: domains |
find_base_rate | Search the Quiet Failures base rates by keyword (e.g. "dmarc", "certificate expiry uk", "subdomain takeover"). Returns matching metrics and their most citable segments. Inputs: query |
get_base_rate | 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 Inputs: metric, segment |
list_base_rates | 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 de |
Every block below points at https://mcp.quietfailures.com/mcp. Pick your client and copy.
claude mcp add --transport http quiet-failures https://mcp.quietfailures.com/mcp
{
"mcpServers": {
"quiet-failures": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://mcp.quietfailures.com/mcp"]
}
}
}{
"mcpServers": {
"quiet-failures": {
"url": "https://mcp.quietfailures.com/mcp"
}
}
}{
"servers": {
"quiet-failures": {
"type": "http",
"url": "https://mcp.quietfailures.com/mcp"
}
}
}{
"context_servers": {
"quiet-failures": {
"url": "https://mcp.quietfailures.com/mcp"
}
}
}{
"mcpServers": {
"quiet-failures": {
"serverUrl": "https://mcp.quietfailures.com/mcp"
}
}
}{
"mcpServers": {
"quiet-failures": {
"url": "https://mcp.quietfailures.com/mcp"
}
}
}name: Quiet Failures
version: 0.0.1
schema: v1
mcpServers:
- name: Quiet Failures
type: streamable-http
url: https://mcp.quietfailures.com/mcp{
"mcpServers": {
"quiet-failures": {
"httpUrl": "https://mcp.quietfailures.com/mcp"
}
}
}{
"mcpServers": {
"quiet-failures": {
"type": "http",
"url": "https://mcp.quietfailures.com/mcp"
}
}
}{
"mcpServers": {
"quiet-failures": {
"url": "https://mcp.quietfailures.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fmcp.quietfailures.com%2Fmcp&type=streamable_http&id=quiet-failures&name=Quiet%20Failures
It answered our last check on 18 October 2026 in 252 ms. Over 10 checks since 5 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by quietfailures.com and served from mcp.quietfailures.com, the vendor's own domain: https://mcp.quietfailures.com/mcp.
6, as returned by the server's own tools/list on 31 August 2026: check_email_auth, check_subdomain_takeover, check_whois, find_base_rate, get_base_rate, list_base_rates.
It answered our last check on 18 October 2026 in 252 ms. Over 10 checks since 5 September 2026 it answered 10.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://mcp.quietfailures.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: com.quietfailures. Endpoint host: mcp.quietfailures.com. ARD identifier: urn:air:com.quietfailures:mcp:quiet-failures.
First indexed 31 August 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.