redact-secret · Report

Secret API key

sk-ant- prefixed secret API key.

Anthropic
Detectors: anthropic-token
Run 2026-10-07
Mode published · redact-secret 0.1.0-beta.14

Dossier verdictReady
Dossier evidence levelT1 · Provider-documented
Dossier researched2026-09-23

New pipelineAuthority

Built from the new pipeline

The new pipeline is the authority for credential qualification. These numbers are read from the qualification view derived from the official credential-eval run of the public-evidence-snapshot population. The regression and policy populations keep their own counts on the qualification pages and are not added in here.

Authority: new
Population: public-evidence-snapshot
Engine: credential-eval 0.1.0-alpha.16
Evidence: snapshot-2026.10.06.4
Run: sha256:4bec6e539482…
Recorded: 2026-10-07
Authorised for: @redact-secret/core@0.1.0-beta.14

Maintainer-reviewed (independent review pending)

598 fixtures of the 7,041 in evidence release snapshot-2026.10.06.4 carry this label. They are counted in the numbers on this page.

Passed the project’s own verification (source evidence, automated checks, recorded counter-arguments); not yet independently reviewed.

OpenRedaction default (all patterns): not measured in this run (optional)

The default (all-pattern) profile is slow and noisy for credential evaluation: personal data and resource identifiers dominate its findings, and its last official measurement took 7 minutes of scanner time on a population the credential profile scans in seconds (its methods run takes 40+ minutes), so it is a manual measurement and never blocks other scanners or core verification (#763). Its earlier results stay as history with their run identity; the credential profile is a separate scanner, never spliced with it.

Last measurement: policy-corpus@linux-x64 (configuration sha256:2451ce7bf380), public-evidence-snapshot+methods@linux-x64 (configuration sha256:d47d081ce5fb), public-evidence-snapshot@linux-x64 (configuration sha256:2451ce7bf380), regression-corpus@linux-x64 (configuration sha256:2451ce7bf380) · engine 0.1.0-alpha.5 · recorded 2026-10-05 · retained record, no longer listed by the run registry. It stays labelled with that run identity and is never combined with another profile or another run.

Open the qualification page for this pointer

OpenRedaction credential profile (33 types): not measured in an official run (local exploratory diagnostics only: see ADR)

The credential profile is the comparison profile chosen in docs/decisions/2026-10-06-choose-the-openredaction-credential-bearing-profile-as-the-comparison-scanner.md. It is optional in the official run class because no pinned engine configuration measures it yet: making it required would refuse every official view until the owner approves the one profile-only run. Its own history starts with that run; nothing of the default's is reused for it.

No earlier measurement of it is recorded. Nothing is shown in its place.

Official measurement: pending: requires owner approval (one profile-only run; see the decision).

Open the qualification page for this pointer

Every population and its qualification

Research record

From credential-evidence snapshot-2026.10.06.4 · records at 77ce761 · schema 1.8.0. It describes the research on the format, not what any scanner or the product does, and not a support status.

Review stateDraft, not reviewed
Format revision1 · current
ResearchResearched
Researched2026-09-23

Format revisions

Revision 1 anthropic:secret-api-key@1current · draft, not reviewed · superseded by @2 · the family's current revision
Revision 2 anthropic:secret-api-key@2proposed · draft, not reviewed · supersedes @1

4 events in the review history: 3 observed, 1 reviewed. Latest: observed on 2026-10-04 by automation, project maintainer. Project-maintained review is not independent validation. The family record at this release.

Format

Provider format research from credential-evidence snapshot-2026.10.06.4 · records at 77ce761 · schema 1.8.0.

What it looks like

Descriptive pattern: ^sk-ant-api03-[A-Za-z0-9_-]{93}AA$

Parts are shown as recorded. Evidence classes belong to the facts below; no class is assigned to a part.

Format facts

Provider documented · provider-source · current · observed 2026-09-23
Claude API key prefix table: the provider identifies sk-ant-api03- as the Claude API key prefix; the 93-character body, alphabet and AA suffix remain tool-corroborated
- platform.claude.com/docs/en/manage-claude/compliance-api-accessprovider-documentation · last read 2026-10-04 · latest outcome read · supports the provider identifies sk-ant-api03- as the Claude API key prefix; the 93-character body, alphabet and AA suffix remain tool-corroborated
Tool corroborated · tool-corroboration · current · observed 2026-09-23
Pinned scanner rules are consistent with the contract grammar (2 artifacts: gitleaks 8.30.1; trufflehog 3.97.4).
- gitleaks/gitleaks @ v8.30.1: config/gitleaks.tomlscanner-rule-source · last read 2026-10-04 · latest outcome read · supports gitleaks 8.30.1: gitleaks.toml
- trufflesecurity/trufflehog @ v3.97.4: pkg/detectors/anthropic/anthropic.goscanner-rule-source · last read 2026-09-26 · latest outcome read · supports trufflehog 3.97.4: anthropic/anthropic
Provider documented · field-prefix · current · observed 2026-09-23
prefix: sk-ant-api03- (Claude API key)
- platform.claude.com/docs/en/manage-claude/compliance-api-accessprovider-documentation · last read 2026-10-04 · latest outcome read · supports prefix: sk-ant-api03- (Claude API key)
Provider documented · field-sibling-prefixes · current · observed 2026-09-23
sibling-prefixes: sk-ant-api01- (Compliance Access Key) and sk-ant-admin01- (Admin API key) are different key classes (Real secrets of other classes: used only as scoped prefix twins, never as benign controls.)
- platform.claude.com/docs/en/manage-claude/compliance-api-accessprovider-documentation · last read 2026-10-04 · latest outcome read · supports sibling-prefixes: sk-ant-api01- (Compliance Access Key) and sk-ant-admin01- (Admin API key) are different key classes
Tool corroborated · field-body · current · observed 2026-09-23
body: 93 characters of [A-Za-z0-9_-] then a literal AA suffix (No length, alphabet or suffix twin is authored on this tool-only field.)
- gitleaks/gitleaks @ v8.30.1: config/gitleaks.tomlscanner-rule-source · last read 2026-10-04 · latest outcome read · supports body: 93 characters of [A-Za-z0-9_-] then a literal AA suffix
- trufflesecurity/trufflehog @ v3.97.4: pkg/detectors/anthropic/anthropic.goscanner-rule-source · last read 2026-09-26 · latest outcome read · supports body: 93 characters of [A-Za-z0-9_-] then a literal AA suffix
Provider documented · dossier-research · current · observed 2026-09-23
Legacy dossier research (verdict ready, tier T1) cited 2 sources; the dossier does not attribute sources to individual properties.
- redact-secret/redact-secret @ 0a35cc713feb77419e40436bcfd083f9078c2cb8: docs/audits/evidence/642/README.mdproject-research-note · last read 2026-09-23 · latest outcome read · supports Final research evidence recorded by the legacy dossier
- platform.claude.com/docs/en/manage-claude/compliance-api-accessprovider-documentation · last read 2026-10-04 · latest outcome read · supports Cited by the legacy dossier research for this family

Open questions

No open question is recorded for this revision.

Benchmark dossier notes

From the provider dossier, as written. The evidence level above says how well the format is backed; a fact the dossier does not record is not shown.

Shape: prefix sk-ant-api03- (Claude API key, created under Claude Console > Settings > API keys). Body: 93 characters from letters, digits, underscore and hyphen, then the two characters AA, about 108 characters in all. The body, alphabet and tail are tool-corroborated, not provider-stated.
Basis: T1 for the prefix (provider table quoted in the #642 evidence). Body grammar: scanner rules (gitleaks, trufflehog) per the #642 record and the #775 discovery pass; gitleaks and its fork betterleaks share a lineage, so that pair counts as one corroboration.
Issuance: not attempted. A key can be created in the Console; no sample was minted for this research.
Contract in core: detector-families.md; final evidence in the #642 record linked in the frontmatter.

In this benchmark

Fixture rows on the current run. Counts are for redact-secret in published · redact-secret 0.1.0-beta.14 mode.

Fixtures: 30
Left readable: 0
Redacted too much: 0
False alarms: 0

30 fixtures: 9 expect a redaction, 18 must stay quiet, 3 record project policy. See every row

redact-secret fixture counts by evidence level
Evidence level	Fixtures	Left readable	Too much	False alarms
T1Provider-documented	11	0	0	0
T2Tool-corroborated	9	0	0	0
T3Project policy	6	0	0	0
T0Pending review	4	0	0	0

Every scanner on the same fixtures

In run order. Counts are what each scanner recorded on this family's fixtures, whichever rules it has; a scanner with no rule for the family has nothing to report on it.

Counts per scanner on this family's fixtures
Scanner	Fixtures	Left readable	False alarms
flare-redactRuntime library · 1.6.1 · Published npm package · secrets-only (pii, generic_assignment disabled) · JavaScript engine1 rule targets it	30	0	3
gitleaksRepository scanner · 8.30.1 · Directory scan · default rules1 rule targets it	30	3	1
redact-secretProduct measured here · 0.1.0-beta.14 · Published npm package · default detectors1 detector mapped	30	0	0
trufflehogRepository scanner · 3.97.4 · Filesystem scan · verification disabled1 rule targets it	30	4	0

Looks like it, but isn't

Values the dossier records as resembling this credential without being one.

Collisions: the api01 and admin01 siblings below differ by one segment. The bare sk- vendor-prefix path of a generic token rule is designed not to claim the sk-ant- namespace.

Scanner rules for this family

Mapped by hand (reviewed 2026-09-30) from each scanner's pinned rule file, never from what a scanner found on the fixtures.

Peer scanner rules that target this family
Scanner	Rule	What the rule matches
flare-redact · rules 1.6.1	`anthropic_key`	sk-ant- + 24-160 characters
gitleaks · rules 8.30.1	`anthropic-api-key`	sk-ant-api03- + 93 chars + AA
trufflehog · rules 3.97.4	`anthropic`	sk-ant-api03- or sk-ant-admin01- + 93 characters + AA

No rule maps to this family in openredaction.

Find

Evidence level

Scanners

30 of 30 rows

Fixtures in this family

30 rows, redact-secret's outcome on each. Rows that need a look come first (0), then the rest in corpus order. Choose "Every scanner" to see each scanner's outcome for the same rows.

Fixtures in Secret API key
Fixture	Kind and evidence	redact-secret
`anthropic-token-api03-no-final-hyphen-prefix-twin`anthropic · prefix-near-miss	Must not flagT2 · Tool-corroborated · twin	Quiet
`anthropic-token-api03-plain-twin`anthropic · prefix-near-miss	Must not flagT2 · Tool-corroborated · twin	Quiet
`anthropic-token-api03-unicode-crlf-twin`anthropic · prefix-near-miss	Must not flagT2 · Tool-corroborated · twin	Quiet
`anthropic-token-api03-vendor-stem-prefix-twin`anthropic · prefix-near-miss	Must not flagT2 · Tool-corroborated · twin	Quiet
`anthropic-token-python-client`anthropic · documented-format-literal	Must redactT1 · Provider-documented	Redacted
`anthropic-token-shape-1-bare`anthropic · documented-format-literal	Project policyT3 · Project policy	Redacted
`anthropic-token-shape-1-quoted`anthropic · documented-format-literal	Project policyT3 · Project policy	Redacted
`anthropic-token-shape-1-unicode-crlf`anthropic · documented-format-literal	Project policyT3 · Project policy	Redacted
`anthropic-token-api03-admin-prefix-plain-twin`anthropic · unsettled-evidence-input	Pending reviewT0 · Pending · twin	Unscored
`anthropic-token-api03-admin-prefix-unicode-crlf-twin`anthropic · unsettled-evidence-input	Pending reviewT0 · Pending · twin	Unscored
`anthropic-token-api03-compliance-prefix-plain-twin`anthropic · unsettled-evidence-input	Pending reviewT0 · Pending · twin	Unscored
`anthropic-token-api03-compliance-prefix-unicode-crlf-twin`anthropic · unsettled-evidence-input	Pending reviewT0 · Pending · twin	Unscored
`anthropic-token-api03-curl-x-api-key`anthropic · documented-format-literal	Must redactT1 · Provider-documented	Redacted
`anthropic-token-api03-dotenv`anthropic · documented-format-literal	Must redactT1 · Provider-documented	Redacted
`anthropic-token-api03-plain`anthropic · documented-format-literal	Must redactT1 · Provider-documented	Redacted
`anthropic-token-api03-python-sdk`anthropic · documented-format-literal	Must redactT1 · Provider-documented	Redacted
`anthropic-token-api03-underscore-prefix-twin`anthropic · prefix-near-miss	Must not flagT2 · Tool-corroborated · twin	Quiet
`anthropic-token-api03-unicode-crlf`anthropic · documented-format-literal	Must redactT1 · Provider-documented	Redacted
`anthropic-token-env-api-key`anthropic · documented-format-literal	Must redactT1 · Provider-documented	Redacted
`anthropic-token-env-template-placeholder`anthropic · documentation-placeholder	Must not flagT1 · Provider-documented	Quiet
`anthropic-token-key-classes-note-prose`anthropic · prose-mention	Must not flagT3 · Project policy	Quiet
`anthropic-token-label-prose`anthropic · benign-lookalike	Must not flagT1 · Provider-documented	Quiet
`anthropic-token-mask`anthropic · benign-lookalike	Must not flagT3 · Project policy	Quiet
`anthropic-token-mcp-server-env`anthropic · documented-format-literal	Must redactT1 · Provider-documented	Redacted
`anthropic-token-prefix-only`anthropic · benign-lookalike	Must not flagT2 · Tool-corroborated	Quiet
`anthropic-token-reference`anthropic · benign-lookalike	Must not flagT3 · Project policy	Quiet
`anthropic-token-response-identifiers-public-id`anthropic · public-identifier	Must not flagT2 · Tool-corroborated	Quiet
`anthropic-token-short-body`anthropic · benign-lookalike	Must not flagT2 · Tool-corroborated	Quiet
`anthropic-token-x-api-key-header`anthropic · documented-format-literal	Must redactT1 · Provider-documented	Redacted
`anthropic-token-x-api-key-header-stem-twin`anthropic · prefix-near-miss	Must not flagT2 · Tool-corroborated · twin	Quiet

Sources

Researched 2026-09-23.

Documentation and code

platform.claude.com/docs/en/manage-claude/compliance-api-access

Research log

redact-secret/redact-secret#642Research issue
Final evidence, pinned to a commit/redact-secret/redact-secret/blob/0a35cc713feb77419e40436bcfd083f9078c2cb8/docs/audits/evidence/642/README.md