BlackVeil DNS & Email Security Scanner MCP Server

DNS and email security scanner with 79 MCP tools for SPF, DMARC, DNSSEC, SSL, and brand audits.

Pod connected. On 2026-09-05 the server did not respond usably (unreachable).

Status

Pod connected to BlackVeil DNS & Email Security Scanner on 2026-09-05. It did not answer, responding in 10262ms.

Connect

A hosted endpoint at https://dns-mcp.blackveilsecurity.com/mcp, over streamable-http. Nothing to install.

{
  "mcpServers": {
    "blackveil-dns-email-security-scanner": {
      "type": "http",
      "url": "https://dns-mcp.blackveilsecurity.com/mcp"
    }
  }
}

Reviewed GitHub reports

34 GitHub reports passed Pod's relevance review. This can include external user reports, maintainer-confirmed bugs, and concrete feature gaps. It is evidence to inspect, not a count of distinct defects. Showing 12.

Most discussed

v3.58.0 live-verification follow-ups: timeout guidance names the wrong source, Certspotter no longer attempted, BV_CERTSTREAM bound but reports not-consulted

Found by live verification of v3.58.0 immediately after deploy (version f89d6101, 100%). #734's fix verifies correctly; these are defects in #735's messaging that I shipped, plus one observation that needs investigating before anyone trusts the new BV_CERTSTREAM binding.

1. Source-specific measurements are attributed to whichever source timed out

Live output for meta.com and anthropic.com:

crtsh timed out — this is deterministic for this domain, not transient, so an…

[Read the thread](https://github.com/MadaBurns/bv-mcp/issues/738) · 2026-08-20 · closed · 5 comments

### check_dane_https scores a STALE TLSA pin as 100 — presence is checked, correctness is not

## Summary

`check_dane_https` scores a TLSA record **100 / "Valid TLSA record configured"** without verifying that the pinned hash matches the certificate the host actually serves. A stale DANE-EE pin — which actively breaks every DANE-validating client — is reported as a pass.

Found by scanning our own production domain during a zone audit on 2026-08-30.

## Evidence

`blackveilsecurity.com` published `_443._tcp` TLSA `3 1 1` (DANE-EE / SPKI / SHA-256):

pinned SPKI sha256:…

Read the thread · 2026-08-30 · closed · 4 comments

Unprovisioned / tier-denied OSINT + recon tools return passed: true, score: 100

An unavailable lane returns a result that reads as a clean pass. A consumer keying on passed/score — a dashboard, a proposal generator, or an LLM skimming the response — records "no findings" where no measurement was performed.

Observed (hosted deployment, 2026-08-18, v3.52.0)

{"category":"osint_investigation","passed":true,"score":100,
 "findings":[{"category":"osint_investigation","title":"OSINT investigation unavailable",
 "severity":"info","detail":"OSINT domain…

[Read the thread](https://github.com/MadaBurns/bv-mcp/issues/695) · 2026-08-18 · closed · 4 comments

### check_dnssec_chain: false 'unverified root' from cached transient-empty (edge-cache hypothesis refuted)

## Summary

`check_dnssec_chain` reports a false **HIGH "Broken DNSSEC chain at ."** for every correctly-signed domain in **production**, because the root (and TLD) `DNSKEY`/`DS` DoH queries return **empty** in prod — even though the records exist.

Surfaced during the full-tool QA pass. Reproduced on cloudflare.com and ietf.org (both broke at `.`, walk stopped at the TLD).

## Root cause — isolated to the prod edge, NOT the code

A real-network test in the **workerd** runtime (same engine as…

[Read the thread](https://github.com/MadaBurns/bv-mcp/issues/199) · 2026-05-24 · closed · 4 comments

### check_ssl and check_ptr time out against fastmail.com in a full scan

Found by a live post-deploy accuracy sweep of prod 3.43.0.

## Observed

`scan_domain(fastmail.com, force_refresh: true)`:

```json
"checkStatuses": {"ssl": "timeout", "ptr": "timeout", ...},
"inconclusiveCategories": ["ssl", "ptr"],
"categoryScores": {"ssl": null, "ptr": null},
"evidence": {"attempted": 19, "completed": 17, "ratio": 0.894...}

Two of nineteen checks timed out against a major, highly-available mail provider. The same scan completed all other 17 checks normally, and…

Read the thread · 2026-08-07 · closed · 2 comments

Most recent

dns-transport arms the DoH timeout before the semaphore slot is acquired — queued scan_domain queries abort unsent under load (same class as #867/#903)

Summary

src/lib/dns-transport.ts arms each DoH query's AbortSignal.timeout(timeoutMs) before the query enters the shared semaphore (SCAN_DNS_CONCURRENCY = 12): the signal is composed at line 174-175 and only then does sem.run(() => fetch(input, init), callerSignal) (line 159) queue the fetch. A query that waits in the semaphore for most of its timeout is dispatched with almost nothing left, or aborts unsent — it then reads as a resolver failure (checkStatus: 'error' /…

Read the thread · 2026-09-04 · open · 0 comments

Package abstentions in check-caa / check-mx / check-ns return checkStatus 'error' with score 100 — never retried, cached, and misreadable as a pass

Summary

Four package abstention paths return checkStatus: 'error' with score: 100, so scan_domain's transient-zero retry never fires for them and the abstention is cached as if it were a stable measurement.

Sites (packages/dns-checks/src/checks/, origin/main @ 85e63ee8d):

• check-caa.ts — the delegationStatus === 'unknown' early return and the lookupCaa catch (two sites)
• check-mx.ts — the queryDNS(domain, 'MX') catch
• check-ns.ts — the NS-query catch (the two…

Read the thread · 2026-09-03 · open · 0 comments

cf-connecting-ip is absent for nearly all custom-domain traffic — every anonymous caller shares one rate-limit bucket and owner-tier auth degrades

Summary

While fixing #876 (PR #891), read-only D1 aggregates over the last 30 days showed that cf-connecting-ip is absent for essentially all traffic that reaches the Worker via the public custom domain (dns-mcp.blackveilsecurity.com), while traffic via the workers.dev URL carries it. #876's "1,082 monitor rows" hypothesis was wrong: the sentinel rows are ~3,560 of ~15,229 public rows and are overwhelmingly real clients (claude_code 2,842, claude_connector 232, most of them…

Read the thread · 2026-09-03 · open · 0 comments

check-mta-sts: two bare catch paths emit SCORED findings on the scanner's own network failure (abstention-doctrine defect)

What happens

@blackveil/dns-checks 1.32.0 (BUILD_INFO.json commit bb736baa), packages/dns-checks/src/checks/check-mta-sts.ts, inside checkMTASTS. Two bare catch blocks convert an exception thrown by the scanner's own I/O into a scored finding against the scanned domain. Line numbers are from the shipped dist/index.js.map sourcesContent; dist line numbers in the vendored dist/index.js are given alongside.

**1. Policy fetch — check-mta-sts.ts:135-144 (dist…

Read the thread · 2026-09-03 · closed · 0 comments

Public SSE-path access-log rows record ip_hash='unknown' despite live cf geo — anonymous traffic unattributable

Summary

mcp_access_log rows on the public path can record the sentinel ip_hash = 'unknown' while carrying real request.cf geo (country populated). Over the last 30 days this affects 1,082 rows — 1,072 with transport='sse' (legacy HTTP+SSE door) and 10 with transport='json' — spanning six countries (NZ, US, JP, DE, IE, NL).

The migration header (scripts/intelligence/sql/0001_mcp_access_log.sql) states unauthenticated callers are "attributed by ip_hash only". These rows…

Read the thread · 2026-09-01 · closed · 0 comments

@blackveil/dns-checks version has been frozen at 1.27.0 across three scoring-model bumps — the version no longer identifies the code

packages/dns-checks/package.json and PARITY_CORPUS_VERSION are both 1.27.0, and have been since #794. Since then SCORING_MODEL_VERSION has advanced three times:

Read the thread · 2026-08-30 · closed · 0 comments

robots gate fails open on an unreachable robots.txt, so a scan result depends on the target's uptime — and nothing records which branch fired

Summary

withRobotsGate is fail-open on any unusable robots.txt. That is a defensible policy — a broken robots.txt must not block a scan — but it makes a scan result depend on whether the target's web server happened to be up during a 3-second window, and nothing in the output records which branch fired. Two runs minutes apart can produce a scored result and an unscored one for the same domain, with no way to tell them apart after the fact.

Mechanism…

Read the thread · 2026-08-20 · closed · 0 comments

See all 18 reports Pod holds for BlackVeil DNS & Email Security Scanner — of 34 qualified upstream.

Firsthand observations

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