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@blackveil/dns-checks

v1.60.2

Published

Runtime-agnostic DNS and email security checks (16 checks + scoring engine) for BlackVeil Security

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Readme

@blackveil/dns-checks

DNS and email security check implementations for BlackVeil Security.

License: BUSL-1.1 — Copyright (c) 2023-2026 BLACKVEIL Security

Installation

npm install @blackveil/dns-checks

Usage

DNS checks take a queryDNS function as their second argument (dependency injection); the HTTP checks (checkSSL, checkHTTPSecurity) take a fetch-compatible function instead:

import { checkSPF } from '@blackveil/dns-checks';

const result = await checkSPF('example.com', async (domain, type, opts) => {
  // Your DNS resolver implementation
  return ['v=spf1 include:_spf.google.com ~all'];
});

console.log(result.score); // 0-100
console.log(result.findings); // Array of findings

Scoring

import { computeScanScore } from '@blackveil/dns-checks/scoring';

const score = computeScanScore(checkResults);
const grade = score.grade; // A+, A, B+, etc., or null when the scan is ungraded (score.overall is null)

The scoring registry includes the authoritative_dns_infra category used by the MCP worker's authoritative DNS infrastructure profile. In normal mail/web profiles it carries zero scoring weight; when the dedicated profile is selected, it is weighted with DNSSEC, NS, and zone-hygiene evidence.

Available Checks

| Check | Function | Standard | |-------|----------|----------| | SPF | checkSPF | RFC 7208 | | DMARC | checkDMARC | RFC 7489 | | DKIM | checkDKIM | RFC 6376 | | DNSSEC | checkDNSSEC | RFC 4033 | | SSL/TLS | checkSSL | — | | MTA-STS | checkMTASTS | RFC 8461 | | TLSRPT | checkTLSRPT | RFC 8460 | | MX | checkMX | RFC 5321 | | CAA | checkCAA | RFC 8659 | | BIMI | checkBIMI | Draft | | NS | checkNS | RFC 1035 | | DANE Email | checkDANE | RFC 7672 | | DANE HTTPS | checkDANEHTTPS | RFC 6698 | | SVCB/HTTPS | checkSVCBHTTPS | RFC 9460 | | Subdomain Takeover | checkSubdomainTakeover | — | | HTTP Security | checkHTTPSecurity | — | | Subdomailing | checkSubdomailing | — |

The MCP server package layers additional worker-only tools on top of this library, including check_authoritative_dns_infra and check_root_server_set.

License

Business Source License 1.1 (BUSL-1.1). See LICENSE. Non-commercial use is permitted under the Additional Use Grant; the Licensed Work converts to the MIT License on the Change Date (2030-03-17). Commercial licences are available on request via https://blackveilsecurity.com/contact.