Quiet Failures MCP MCP server

An MCP server providing access to open weekly security base rates and live domain security checks. It allows agents to query global metrics on security failures and perform real-time audits of domains, including DMARC/SPF/DKIM checks, subdomain takeover detection, and WHOIS expiry lookups. The server is read-only, free, and requires no authentication.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Quiet Failures

MCP endpoint (Streamable HTTP)

https://mcp.quietfailures.com/mcp

Vendor documentation

What you can do with it

Query global base rates for security failures like DMARC non-enforcement
Perform live DMARC, SPF, and DKIM audits for specific domains
Check for subdomain takeovers using CT logs and DNS
Retrieve WHOIS expiry dates and registrar information for domains

Tools advertised by the last live check:

list_base_rates
find_base_rate
get_base_rate
check_email_auth
check_subdomain_takeover
check_whois

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http quiet-failures-mcp https://mcp.quietfailures.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add quiet-failures-mcp --url https://mcp.quietfailures.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable quiet-failures-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "quiet-failures-mcp": {
      "url": "https://mcp.quietfailures.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "quiet-failures-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.quietfailures.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start quiet-failures-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "quiet-failures-mcp": {
      "type": "http",
      "url": "https://mcp.quietfailures.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http quiet-failures-mcp https://mcp.quietfailures.com/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "quiet-failures-mcp": {
      "url": "https://mcp.quietfailures.com/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "quiet-failures-mcp": {
      "serverUrl": "https://mcp.quietfailures.com/mcp"
    }
  }
}

See all 1,583

Do you run Quiet Failures MCP?

Prove ownership with a DNS record, a well-known file, or your Official MCP Registry entry, and your edits publish immediately. Proofs are re-checked weekly; admins can still hide or remove a listing.

Claim this listing