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Kingfisher
New York, NY, USA
What it is
Kingfisher is a free, Apache-2.0-licensed tool for finding leaked credentials and supporting follow-up work. It scans files, directories, Git repositories and history, archives, SQLite databases, Python bytecode, Docker images, cloud storage, and developer platforms. Documented integrations include GitHub, GitLab, Azure Repos, Bitbucket, Gitea, Hugging Face, AWS S3, Google Cloud Storage, Docker, Jira, Confluence, Slack, Microsoft Teams, and Postman. The project describes a multithreaded Vectorscan engine and supports Betterleaks TOML and Kingfisher YAML rules. Results can be viewed in human-readable form or exported as TOON, JSON, JSONL, SARIF, BSON, or HTML. A local report viewer can combine and deduplicate Kingfisher, SARIF, Gitleaks, and TruffleHog reports. The tool can validate whether credentials are live, map their blast radius, and support revocation for credentials with supported provider workflows. Live checks make provider API requests, so they should be used only with authorization to inspect the target account. Kingfisher supports Linux, macOS, Windows, and self-hosted use.
For and against
For
- Scans repositories, archives, databases, cloud storage, and platforms.
- Supports custom detection rules in two formats.
- Exports reports in JSON, SARIF, HTML, and other formats.
- Pre-commit hooks can block commits with findings.
Against
- Live validation and blast-radius checks call provider APIs.
- Revocation is limited to supported credential workflows.
- Provider API checks require authorization.
The verdict
Kingfisher combines broad secret scanning with report handling and selected credential-response capabilities. Its live checks and revocation workflows have provider and authorization limits to consider.
Who it suits
It suits security and development teams scanning code, repositories, storage, or connected platforms for leaked secrets. Teams can also use its pre-commit hooks to scan staged changes and block commits when findings produce a non-zero exit code.
Plans and prices
Free and open source
No separate paid or enterprise tier · Apache-2.0 licensed
Read 30 Sep 2026 · github.com
On the record
- API access behavior
- Live validation and blast-radius mapping make requests to provider APIs, and the project says to use them only when authorized to inspect the target account.github.com · read 30 Sep 2026
- Credential containment
- Revocation is opt-in and available only for credentials with a supported provider workflow.github.com · read 30 Sep 2026
- Detection
- The project describes a multithreaded Vectorscan scanning engine and support for Betterleaks TOML and Kingfisher YAML rule formats.github.com · read 30 Sep 2026
- Developer workflow
- Kingfisher provides pre-commit hooks that scan staged changes and can block commits when findings cause a non-zero exit code.github.com · read 30 Sep 2026
- Installation
- The project documents prebuilt releases, Homebrew, mise, Linux and macOS installers, a Windows installer, PyPI wheels, Docker, and source builds.github.com · read 30 Sep 2026
- Integrations
- Documented platform integrations include GitHub, GitLab, Azure Repos, Bitbucket, Gitea, Hugging Face, AWS S3, Google Cloud Storage, Docker, Jira, Confluence, Slack, Microsoft Teams, and Postman.github.com · read 30 Sep 2026
- License
- The repository states that Kingfisher is licensed under Apache License 2.0.github.com · read 30 Sep 2026
- Maker
- MongoDB says it was founded in 2007 and lists its corporate headquarters in New York City.mongodb.com · read 30 Sep 2026
- Purpose
- Kingfisher scans for leaked secrets, checks which credentials are live, maps their blast radius, and supports revocation for supported credentials.github.com · read 30 Sep 2026
- Release security
- The installation guide says every release ships SLSA v1 build-provenance attestations using Sigstore keyless OIDC.github.com · read 30 Sep 2026
- Reports
- It supports human-readable output and TOON, JSON, JSONL, SARIF, BSON, and HTML report formats.github.com · read 30 Sep 2026
- Scan targets
- It can scan files, directories, Git repositories and history, archives, SQLite databases, Python bytecode, Docker images, cloud storage, and developer platforms.github.com · read 30 Sep 2026
- Triage
- A local report viewer can combine and deduplicate Kingfisher, SARIF, Gitleaks, and TruffleHog reports; the README also links to a hosted viewer.github.com · read 30 Sep 2026
