BlackVeil DNS & Email Security Scanner

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Runs in the cloud
• Transport: Streamable HTTP
• Category: Chat & email

Install

Pick the AI app you use, then copy the settings.

You need

• Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

https://dns-mcp.blackveilsecurity.com/mcp

claude mcp add --transport http dns https://dns-mcp.blackveilsecurity.com/mcp

{
  "mcpServers": {
    "dns": {
      "url": "https://dns-mcp.blackveilsecurity.com/mcp"
    }
  }
}

{
  "servers": {
    "dns": {
      "type": "http",
      "url": "https://dns-mcp.blackveilsecurity.com/mcp"
    }
  }
}

https://dns-mcp.blackveilsecurity.com/mcp

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.

• check_mx

  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 when asked which email provider hosts inbound mail for a domain, or to see MX reco

• check_spf

  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 (which mail servers are whitelisted). Use when you need to know who is permitted to

• check_dmarc

  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 determine a domain's DMARC enforcement level, whether it sends aggregate reports, or if

• check_dkim

  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 email signatures are cryptographically sound. Part of the scan_domain audit.

• check_dnssec

  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 enabled and validating. Part of the scan_domain audit.

• check_ssl

  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 public Certificate Transparency logs — this describes the most recently LOGGED certif

• check_mta_sts

  Check whether a domain enforces SMTP TLS for inbound mail via MTA-STS, protecting against downgrade attacks. Queries _mta-sts. and fetches the policy file, reports mode (enforce/testing/none) and MX coverage. Use to verify whether inbound SMTP is protected against TLS downgrade o

• check_ns

  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 authoritative AA responses, and checks required glue addresses. Use to detect stale reg

• check_caa

  Look up CAA records for a domain. Shows which Certificate Authorities are authorized to issue certificates. Part of the scan_domain audit.

• check_bimi

  Check the BIMI brand-logo record at default._bimi. . 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 (VMC or CMC) is not determined — and verifies the DMARC enforcement prerequisite (p=qu

• check_tlsrpt

  Check whether a domain has SMTP TLS Reporting (TLS-RPT) configured. Queries _smtp._tls. for the v=TLSRPTv1 record and validates its reporting destination (rua= mailto:/https:), flagging a missing record, duplicate records, or an invalid/absent reporting URI. Complements MTA-STS b

• check_http_security

  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-Policy, Permissions-Policy, and the cross-origin isolation headers (COOP/COEP/CORP)

• check_dane

  Check DANE/TLSA certificate pinning for SMTP at port 25. Resolves the domain's MX hosts and looks up TLSA records at _25._tcp. , validating their syntax, usage/selector/matching-type fields and DNSSEC backing on the MX host's zone. The record is reported as present but UNVERIFIED

• check_ptr

  Verify forward-confirmed reverse DNS (PTR/FCrDNS) for mail servers. Part of the scan_domain audit.

• check_dane_https

  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 record is reported as present but UNVERIFIED in every deployment: comparison again

• check_svcb_https

  Validate HTTPS/SVCB records (RFC 9460) for modern transport capability advertisement. Part of the scan_domain audit.

• check_lookalikes

  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 attackers. Distinct from check_shadow_domains (TLD variants with auth gaps) and discover

• check_subdomailing

  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 can be hijacked through a dangling domain, or to detect subdomain mailing risk hid

• scan_domain

  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 returns an overall security score, NIST-aligned letter grade (6-band A+/A/B/C/D/

• batch_scan

  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 when you want to audit multiple domains at once or do a bulk scan of several domain

• batch_scan_start

  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.

• batch_scan_status

  Read the owner-scoped status of an asynchronous batch scan.

• batch_scan_findings

  Fetch owner-scoped findings for a completed asynchronous batch scan.

• compare_domains

  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 head-to-head comparison between multiple domains.

• compare_baseline

  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/regression over time (use analyze_drift) and not for comparing multiple domains (use

• check_shadow_domains

  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 auth gaps — distinct from check_lookalikes which detects typosquat/homoglyph impers

• check_txt_hygiene

  Audit TXT records for stale entries and SaaS exposure.

• check_mx_reputation

  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 mail server IP is blacklisted, or if your MX is on any blocklist — distinct from c

• check_srv

  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 advertisements — e.g. plaintext IMAP/POP3/LDAP without an encrypted variant. A do

• check_zone_hygiene

  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 visible, or to audit overall DNS zone cleanliness.

• generate

  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 MTA-STS policy file), fix_plan (prioritized remediation plan for all findings),

• get_domain_rank

  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% of peers". Owner-gate exempt — public cohort data only.

• get_benchmark

  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. Use when asked how a score compares to the industry average, what percentile a

• get_provider_insights

  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 service provider compares to competitors on security posture, or to see typical misc

• assess_spoofability

  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-control sub-scores, and plain-language summary of how easy it would be to spoof em

• check_resolver_consistency

  Check DNS consistency across 4 public resolvers.

• explain_finding

  Explain a finding with impact and remediation.

• map_supply_chain

  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, control DNS, or access integrated services. Use when asked to map third-party or s

• analyze_drift

  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), score delta, and lists of improvements and regressions. Use to answer "did our s

• validate_fix

  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 successful — not for initial inspection of a record.

• resolve_spf_chain

  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.

• discover_subdomains

  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 a lower bound, a host with no publicly-logged certificate never appears, and th

• map_compliance

  Map scan findings to compliance frameworks: NIST 800-177, PCI DSS 4.0, SOC 2, CIS Controls. Shows pass/fail/partial status per control.

• sge_quickscan

  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, DKIM, SMTP transport TLS, MTA-STS enforce, TLS-RPT, full sub-domain coverage — eac

• prioritize_portfolio_leads

  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 ranks. Distinct from map_registrar_products (per-domain product mapping) and bat

• simulate_attack_paths

  Analyze current DNS posture and enumerate specific attack paths an adversary could exploit, with severity, feasibility, steps, and mitigations.

• check_dbl

  Check domain reputation against DNS-based Domain Block Lists (Spamhaus DBL, URIBL, SURBL). Returns listing status with decoded return codes.

• check_rbl

  Check MX server IP reputation against 6 DNS-based Real-time Blocklists (SpamCop, UCEProtect, Mailspike, Barracuda, PSBL). Resolves MX hosts to IPs first.

• cymru_asn

  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.

• rdap_lookup

  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 codes, and domain age. Use when asked who registered the domain, who the regist

• check_realtime_threat_feed

  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.

• check_nsec_walkability

  Assess zone walkability risk by analyzing NSEC3PARAM configuration. Detects plain NSEC zones, weak NSEC3 parameters, and opt-out flags.

• check_dnssec_chain

  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 DNS root, or to see the full DNSSEC delegation path step by step.

• check_agent_discovery

  Assess the security posture of IETF BANDAID agent-discovery records (draft-mozleywilliams-dnsop-dnsaid). Detects SVCB agent records under _agents, _index._{protocol}._agents and _{protocol}._agents, reports whether the discovery zone is DNSSEC-anchored (unsigned = spoofable agent

• check_llms_txt

  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 external link hosts for dangling CNAMEs and deprovisioned-service fingerprints

• check_dnskey_strength

  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 deprecated algorithms (RSA/SHA-1, DSA), independent of whether the DNSSEC chain valid

• check_fast_flux

  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). Compares IP answer sets and TTLs across rounds to identify rapidly rotating infrastruct

• check_subdomain_takeover

  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, Azure Front Door/CDN/Blob/App Service, GCP Cloud Storage, Heroku, GitHub Pages

• check_authoritative_dns_infra

  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 consistency across nameservers, DNSKEY/RRSIG presence (not validation), IPv4/IPv6 answ

• check_root_server_set

  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 available; without it, returns the embedded hints as reference data only.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

• ! Caution

  Maker matches the repo

  The publisher (blackveilsecurity.com) is not the repo owner (MadaBurns); someone else may have listed it

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• ✓ Pass

  Endpoint responds

  Responded in 2117 ms (HTTP 200)

• – Not applicable

  Sign-in with OAuth

  No sign-in needed

• ✓ Pass

  No hidden instructions in tool descriptions

  Read 60 tool descriptions and found no hidden instructions to the AI

Compared with others in Chat & emaili

• More stars than 0% of the other 1771 servers in this category
• Published to the registry more recently than 92% of the other 1771 servers in this category
• Basic checks equal to or better than 44% of the other 1771 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

README from the maker

claude mcp add --transport http blackveil-dns https://dns-mcp.blackveilsecurity.com/mcp

smithery mcp add MadaBurns/bv-mcp

curl https://dns-mcp.blackveilsecurity.com/health

Endpoint   https://dns-mcp.blackveilsecurity.com/mcp

  81 MCP tools · 7 prompts · 6 resources