BlackVeil DNS & Email Security Scanner
com.blackveilsecurity/dnsDNS and email security scanner with 81 MCP tools for SPF, DMARC, DNSSEC, SSL, and brand audits.
Score: 100/100
Handshake verified by our own probe.
why this score
Tools · 81
Look up MX records for a domain. Identifies which mail servers receive inbound email for the domain and which email hosting provider is used (Google Workspace, Microsoft 365, Proofpoint, etc.). Use wh…
Look up and validate the SPF record for a domain. Lists all IP addresses and third-party senders authorised to send email on behalf of the domain, flags syntax errors, and shows the trust surface (whi…
Look up and validate the DMARC record for a domain. Shows the enforcement level (none/quarantine/reject), alignment mode (strict/relaxed), and aggregate/forensic reporting destinations. Use to determi…
Look up DKIM records for a domain. Probes common selectors, validates the signing algorithm used for outgoing email (RSA-1024/2048, Ed25519), and reports key strength. Use to verify that outbound emai…
Check DNSSEC status for a domain. Verifies whether DNS is tamper-proof and protected against cache poisoning and DNS spoofing attacks by validating DNSKEY and DS records. Reports whether DNSSEC is ena…
Check the HTTPS/TLS posture of a domain: HTTPS reachability, HSTS policy, and HTTP-to-HTTPS redirect. Also returns certificate metadata (issuer, expiry date, days remaining, SAN count) read from publi…
Check whether a domain enforces SMTP TLS for inbound mail via MTA-STS, protecting against downgrade attacks. Queries _mta-sts.<domain> and fetches the policy file, reports mode (enforce/testing/none) …
Audit a domain’s nameserver delegation and redundancy. Identifies the DNS hosting provider and, when the infrastructure probe is available, directly compares parent and child NS sets, verifies authori…
Look up CAA records for a domain. Shows which Certificate Authorities are authorized to issue certificates. Part of the scan_domain audit.
Check the BIMI brand-logo record at default._bimi.<domain>. Validates the logo URL (l=) and the presence of mark-certificate authority evidence (a=) — the a= tag is a bare URL, so the certificate type…
Check whether a domain has SMTP TLS Reporting (TLS-RPT) configured. Queries _smtp._tls.<domain> for the v=TLSRPTv1 record and validates its reporting destination (rua= mailto:/https:), flagging a miss…
Audit a domain's browser-facing HTTP security headers over HTTPS. Inspects Content-Security-Policy (flagging unsafe-inline/unsafe-eval/wildcards), X-Frame-Options, X-Content-Type-Options, Referrer-Pol…
Check DANE/TLSA certificate pinning for SMTP at port 25. Resolves the domain's MX hosts and looks up TLSA records at _25._tcp.<mx-host>, validating their syntax, usage/selector/matching-type fields an…
Verify forward-confirmed reverse DNS (PTR/FCrDNS) for mail servers. Part of the scan_domain audit.
Verify DANE certificate pinning for HTTPS connections. Looks up TLSA records at _443._tcp.{domain} (port 443) and validates their syntax, usage/selector/matching-type fields and DNSSEC backing. The re…
Validate HTTPS/SVCB records (RFC 9460) for modern transport capability advertisement. Part of the scan_domain audit.
Detect active typosquat and lookalike/homoglyph domains that impersonate your brand and could be used in phishing. Identifies character-substitution and visual-confusion domains registered by attacker…
Detect SubdoMailing risk: analyzes the SPF include chain for dangling or hijackable subdomains that could let an attacker send email as the domain. Use when you want to know if an SPF include chain ca…
Run a full DNS and email security audit for a single domain. Aggregates every scan-included check in parallel (SPF, DKIM, DMARC, DNSSEC, TLS/SSL, MTA-STS, CAA, BIMI, subdomain takeover, and more) and …
Bulk-scan up to 10 domains in parallel. Runs a full security audit on each domain in the list and returns score, NIST-aligned letter grade (6-band A+/A/B/C/D/F), and finding counts per domain. Use whe…
Start a durable asynchronous scan of 1–10 domains. Returns a stable job ID; replaying the same idempotency key with the same principal, normalized inputs, and scoring versions returns the same job.
Read the owner-scoped status of an asynchronous batch scan.
Fetch owner-scoped findings for a completed asynchronous batch scan.
Side-by-side security comparison of 2–5 domains. Shows relative scores, category gaps, and unique weaknesses for each domain. Use when comparing your security posture against a competitor, or doing a …
Compare a domain's current security configuration against a fixed policy baseline to determine compliance. Use to check whether a domain meets a policy requirement — not for tracking improvement/regre…
Find alternate TLD variants of a domain (e.g. example.net, example.co) that have weak or missing email authentication and could be used to spoof email. Use when asked about TLD variants with email aut…
Audit TXT records for stale entries and SaaS exposure.
Check whether the mail server (MX) IP addresses are listed on spam blocklists (Spamhaus, Barracuda, SORBS, and other RBLs). Also verifies reverse DNS for MX hosts. Use when you want to know if your ma…
Map a domain's DNS-visible service footprint by probing 19 common SRV record prefixes (email, calendar, messaging, directory, web) in parallel. Returns discovered services and flags insecure service a…
Audit DNS zone hygiene: identifies sensitive or forgotten subdomains exposed in DNS, stale SOA records, and zone propagation issues. Use to find any sensitive subdomains that should not be publicly vi…
Generate a DNS/email security remediation artifact. Artifact types: spf_record (build a new SPF record), dmarc_record (create a DMARC policy), dkim_config (DKIM key setup), mta_sts_policy (generate an…
Rank a domain against its country or global cohort using the GSI benchmark corpus. Accepts a domain score (from scan_domain) and optional country/sector; returns a percentile: "scores better than X% o…
Get industry benchmark data: shows what percentile a domain's security score ranks at within its sector or country cohort, the mean score, and the most common DNS security failures across the industry…
Get security benchmarks and common configuration issues for a specific email or DNS service-provider cohort (e.g. Google Workspace customers, Microsoft 365 customers). Use when asked how an email serv…
Compute a composite email spoofability risk score (0–100, higher = more spoofable) by combining SPF trust surface, DMARC enforcement, and DKIM coverage. Returns a risk level (minimal→critical), per-co…
Check DNS consistency across 4 public resolvers.
Explain a finding with impact and remediation.
Map DNS-visible third-party service dependencies for a domain. Correlates SPF, NS, TXT verifications, SRV services, and CAA records to reveal which third-party vendors can send email as the domain, co…
Measure whether a domain's DNS security posture improved or regressed by comparing the current state against a prior scan snapshot. Returns a drift classification (improving/stable/regressing/mixed), …
Re-check a specific security control after applying a fix, to confirm the finding is now resolved. Use only when a fix has already been applied and you want to verify or confirm the remediation was su…
Trace the full SPF include chain for a domain. Recursively resolves all includes, shows lookup count, tree depth, and flags circular includes or exceeding the 10-lookup limit.
Find subdomains of a domain using Certificate Transparency logs. Reveals shadow IT, forgotten services, and unauthorized certificate issuance. Returns a CT SAMPLE, not an asset inventory: the count is…
Map scan findings to compliance frameworks: NIST 800-177, PCI DSS 4.0, SOC 2, CIS Controls. Shows pass/fail/partial status per control.
Answer, for ONE domain, whether it meets the New Zealand Secure Government Email (SGE) requirements agencies must satisfy by October 2026. Reports all seven SGE controls — DMARC p=reject, SPF -all, DK…
Rank a brand’s portfolio (or an explicit domain set) into prioritized registrar-partner sales leads by product-gap value × severity. Multi-domain, paid. Reuses map_registrar_products per domain, then …
Analyze current DNS posture and enumerate specific attack paths an adversary could exploit, with severity, feasibility, steps, and mitigations.
Check domain reputation against DNS-based Domain Block Lists (Spamhaus DBL, URIBL, SURBL). Returns listing status with decoded return codes.
Check MX server IP reputation against 6 DNS-based Real-time Blocklists (SpamCop, UCEProtect, Mailspike, Barracuda, PSBL). Resolves MX hosts to IPs first.
Map domain IPs to Autonomous System Numbers via Team Cymru DNS. Returns ASN, prefix, country, registry, and organization for each IP. Flags high-risk hosting ASNs.
Fetch domain registration data via RDAP (modern WHOIS replacement). Returns the domain registrar (the company the domain was registered with), registrant contact, creation/expiration dates, EPP status…
Check a domain against BlackVeil real-time threat intelligence (curated intel-gateway feed). Distinct from DNSBL checks. Operator-deploy only; degrades to info when unprovisioned.
Assess zone walkability risk by analyzing NSEC3PARAM configuration. Detects plain NSEC zones, weak NSEC3 parameters, and opt-out flags.
Walk the full DNSSEC chain of trust from the DNS root down to the target domain, tracing DS/DNSKEY records and algorithm usage at each zone level. Use when asked to trace the chain of trust from the D…
Assess the security posture of IETF BANDAID agent-discovery records (draft-mozleywilliams-dnsop-dnsaid). Detects SVCB agent records under _agents/_index._{protocol}._agents, reports whether the discov…
Inspect a domain's published /llms.txt and /llms-full.txt for links and install instructions an AI agent could inherit from someone else. Parses and dedupes the links (same-origin vs external), sweeps…
Audit the cryptographic strength of DNSKEY signing algorithms used for DNSSEC. Reports which algorithm is used for DNSSEC signing keys (RSA/SHA-1, RSA/SHA-256, ECDSA P-256, Ed25519, etc.), flags depre…
Detect fast-flux DNS behavior: performs multiple rounds of A/AAAA queries and checks whether IP addresses are rotating rapidly on each DNS query (a sign of botnet or malicious infrastructure). Compare…
Sweep subdomains for dangling CNAMEs pointing to deprovisioned cloud services that could be claimed by an attacker (subdomain takeover vulnerabilities). Detects 16 provider families (AWS S3/CloudFront…
Measure authoritative DNS infrastructure posture for a hostname over direct DNS-over-TCP/53 from a single vantage: TCP/53 reachability, the authoritative AA flag, recursion exposure, SOA serial consis…
Query a rotating sample of 3 root servers per call and compare the priming NS set, glue, SOA serials, and cross-root consistency against the embedded official root hints. Uses BV_INFRA_PROBE when avai…
Discover all domains that belong to a brand's portfolio by aggregating certificate, DNS, redirect, and mail-policy signals. Use when asked what domains are part of a brand portfolio, or to find all do…
Start an async brand-domain discovery for the EXACT seed domain provided (the async sibling of discover_brand_domains, which can run ~24s and time out interactive clients). Same args as discover_brand…
Poll the status of an async brand-domain discovery started with discover_brand_domains_start. Returns status (queued | running | completed | failed) and progress. Owner-scoped — operationIds owned by …
Fetch the ranked candidate domains (the discovery CheckResult) for an async run started with discover_brand_domains_start. Returns notReady while the discovery is still in-flight; the discovery result…
Run a full brand audit on a single target with optional standard/deep discovery depth, brand aliases, and caller-supplied candidate domains. Discovers brand-related domains, looks up registrar + regis…
Enqueue an async brand audit across up to 50 target domains with optional standard/deep discovery depth, brand aliases, and caller-supplied candidate domains. Returns { auditId, queuedAt, targetCount,…
Poll the status of an enqueued brand audit. Returns audit-level status (queued | running | completed | failed), progress 'N/M', and per-target statuses. Owner-scoped — auditIds owned by other principa…
Fetch the result JSON for a completed brand audit. With `target` set, returns the per-target CheckResult; without, returns the audit-level aggregate. Returns notReady when polling an in-flight audit. …
Returns the caller's recurring brand-audit watches: watchId, domain, interval, webhook presence, last-run time, and active state. Owner-scoped. Read-only.
Creates a recurring brand-audit watch for a domain on a daily/weekly/monthly cadence. Each run enqueues a fresh brand_audit_batch_start and (when a webhook is configured) POSTs a diff webhook on class…
Permanently removes a recurring brand-audit watch by watchId. Owner-scoped — a watchId owned by another principal surfaces as notFound. Returns confirmation of deletion.
Start an async cloud-bucket discovery scan for a target domain. Operator-deploy only; targets must be operator-authorized on the recon watchlist; degrades to info when unprovisioned. Returns a scanId …
Poll the status of a cloud-bucket discovery scan by scanId. Operator-deploy only; targets must be operator-authorized on the recon watchlist; degrades to info when unprovisioned. Returns scan status (…
Retrieve findings from a completed cloud-bucket discovery scan by scanId. Operator-deploy only; targets must be operator-authorized on the recon watchlist; degrades to info when unprovisioned. The sca…
Start an async OSINT investigation for a domain. Operator-deploy only; targets must be operator-authorized on the recon watchlist; degrades to info when unprovisioned. Returns an investigationId immed…
Start an async deep-infrastructure OSINT investigation for a query (domain, IP, or org). Operator-deploy only; targets must be operator-authorized on the recon watchlist; degrades to info when unprovi…
Start an async supply-chain OSINT investigation for a query. Operator-deploy only; targets must be operator-authorized on the recon watchlist; degrades to info when unprovisioned. Returns an investiga…
Start an async OSINT investigation for a username (cross-platform presence, breach correlation). Owner/enterprise tier only — people-centric OSINT is restricted to prevent misuse. Returns an investiga…
Start an async OSINT investigation for an email address (breach exposure, account correlation). Owner/enterprise tier only — people-centric OSINT is restricted to prevent misuse. Returns an investigat…
Poll the status of an OSINT investigation by investigationId. Operator-deploy only; targets must be operator-authorized on the recon watchlist; degrades to info when unprovisioned. Returns current sta…
Retrieve the final report of a completed OSINT investigation by investigationId. Operator-deploy only; targets must be operator-authorized on the recon watchlist; degrades to info when unprovisioned o…
Resources · 6
Overview of all DNS/email security checks performed by Blackveil DNS, including SPF, DMARC, DKIM, DNSSEC, SSL/TLS, MTA-STS, NS, CAA, MX, and Subdomain Takeover.
dns-security://guides/security-checks
How DNS/email security scores and grades are calculated, including category weights and severity penalties.
dns-security://guides/scoring
List of DNS record types queried by this server and their purpose in security analysis.
dns-security://guides/record-types
Recommended tool usage patterns and decision trees for common DNS security tasks.
dns-security://guides/agent-workflows
How benchmark and provider cohort features work, privacy guarantees, and data freshness.
dns-security://guides/intelligence
Step-by-step DNS record fix patterns for each check category, using generate_* tools.
dns-security://guides/remediation
Prompts · 7
DNS & email security audit with remediation
Email auth posture: SPF, DMARC, DKIM, MTA-STS
Check domain against security policy baseline
Scan, plan fixes, generate DNS records
Email hardening plan with DNS record generation
Benchmark domain against email provider cohort
Spoofability, lookalikes, shadow domain analysis
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How to use
Add to your Claude Desktop / Cursor / Cline MCP config:
{
"mcpServers": {
"blackveil_dns_\u0026_email_security_scanner": {
"url": "https://dns-mcp.blackveilsecurity.com/mcp",
"transport": "streamable-http"
}
}
}