discover_subdomains

shallow

com.blackveilsecurity/dns · Verify this server

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 the result carries a per-source `coverage` record stating what was actually consulted. `countBasis` says whether `totalSubdomains` is the tool’s normal reach (`sample`) or a `floor` from a run whose recall was cut (then `minSubdomainsObserved` is present); `concreteSubdomains` excludes wildcard patterns.

100.0/100

1 trials · measured 21 days ago

discover_subdomains scores 100.0/100 on Vouch's measured behaviour index, from 1 real invocation trials against com.blackveilsecurity/dns, measured 16 Sept 2026 under methodology v0.2.0. Every measured component scored 100.

Component breakdown

ComponentWeightValue
Reliability35%not applicable
Schema integrity25%100.0
Failure behaviour15%not applicable
Latency15%not applicable
Concurrency10%not applicable

Tool details

Transport
remote
Credential class
open
Input schema
not declared
Output schema
not declared
Side-effect classification
unclassified

Score history

DayScoreTierMethodology
2026-09-16100.0shallowv0.2.0

Probe evidence

ProbeOutcomes
schema_integritypass: 1

Raw request/response logs are not archived yet — the outcome counts above are drawn directly from every recorded trial.

Embed this score

Available for every tool, scored or not — not a verification perk. Always links back to this page.

Vouch score: discover_subdomains
[![Vouch score](https://vouch.tools/api/tools/014afd3f-4892-43f6-8d60-60bfe3cac387/badge.svg)](https://vouch.tools/tools/014afd3f-4892-43f6-8d60-60bfe3cac387)
discover_subdomains — Vouch