Dockerfile Audit

Hadolint-grade Dockerfile audit — 19 checks: secrets, privileges, supply chain, hygiene.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "dockerfile-audit": {
      "command": "uvx",
      "args": [
        "without"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

Dockerfile Security & Quality Audit

Hadolint-grade Dockerfile audit as an MCP server. 18+ checks across 5 categories, every finding ships with severity, line number, remediation text, and a copy-paste Dockerfile snippet.

Built by Unbearable Labs. Pay-per-event pricing — only billed when a tool is actually called.

Available on

Apify Actor Store — primary, metered usage (PPE)
MCPize — pending submission
MCP.so — pending submission
PulseMCP — pending submission
Smithery — pending submission
Glama — pending submission

Newsletter: Unbearable TechTips Weekly · All Actors: github.com/UnbearableDev

What it does

Point any MCP-capable client (Claude Desktop, Cursor, n8n, Make, Zapier, custom agents) at this server, hand it a Dockerfile, get back a structured report:

Severity — high / medium / low / info
Line number — exact location in the file
Description — what's wrong and why it matters
Remediation — what to do about it
Fix snippet — Dockerfile syntax you can paste directly

Tools

Tool	Purpose
`audit_dockerfile(dockerfile_content? \| dockerfile_url?, min_severity='low')`	Run all checks
`check_base_image(...)`	FROM/tag/digest/registry checks only
`check_instructions(...)`	CMD form, ADD vs COPY, MAINTAINER, etc.
`check_security(...)`	USER, sudo, chmod 777, curl\|bash, hardcoded secrets, HEALTHCHECK
`check_efficiency(...)`	apt cache hygiene, pip caching
`check_secrets(...)`	ARG with secret-pattern names
`list_checks(category?)`	Browse the full check catalog

Provide exactly one of dockerfile_content (paste the file) or dockerfile_url (HTTPS URL — e.g. GitHub raw).

Check catalog (v1: 18 checks across 5 categories)

ID	Category	Severity	Title
DFA-001	base_image	medium	Image uses :latest tag or no tag
DFA-002	base_image	info	No SHA256 digest pin on FROM
DFA-003	base_image	medium	Untrusted registry
DFA-010	instructions	low	CMD in shell form
DFA-011	instructions	low	ENTRYPOINT in shell form
DFA-012	instructions	info	MAINTAINER instruction is deprecated
DFA-013	instructions	medium	ADD used where COPY would suffice
DFA-020	security	medium	No USER directive (runs as root)
DFA-021	security	high	USER root set explicitly
DFA-022	security	high	sudo invoked in RUN
DFA-023	security	high	chmod 777 in RUN
DFA-024	security	medium	curl\|bash pattern in RUN
DFA-025	security	high	Hardcoded secret in ENV
DFA-027	security	low	No HEALTHCHECK
DFA-030	efficiency	low	apt-get update without install
DFA-031	efficiency	low	apt-get install without --no-install-recommends
DFA-032	efficiency	low	pip install without --no-cache-dir
DFA-040	secrets	medium	ARG with secret-pattern name

Use list_checks to get the canonical, up-to-date catalog.

Pricing

Event	USD
Any audit / check_* tool call	$0.02
`list_checks` discovery	$0.005

Example response (truncated)

config.json

{
  "summary": {
    "total_findings": 6,
    "by_severity": {"high": 2, "medium": 2, "low": 2, "info": 0}
  },
  "findings": [
    {
      "id": "DFA-021",
      "category": "security",
      "severity": "high",
      "instruction": "USER",
      "line_number": 3,
      "title": "USER root set explicitly",
      "description": "...",
      "remediation": "Switch to a non-root UID after any root-required RUN steps.",
      "fix_dockerfile_snippet": "USER 10001:10001",
      "references": ["CIS-Docker-4.1"]
    }
  ]
}

Connecting from Claude Desktop

config.json

{
  "mcpServers": {
    "dockerfile-audit": {
      "transport": "streamable-http",
      "url": "https://YOUR-ACTOR-URL.apify.actor/mcp"
    }
  }
}

Limits

Dockerfile size: 200 KB cap per audit
URL fetch: 5s timeout, max 3 redirects, HTTPS only
Session timeout: 5 minutes of inactivity

What's NOT covered (yet)

Live image vulnerability scanning (use Trivy / Grype for that)
Multi-stage build optimization analysis (DFA-004 / DFA-005 — roadmapped)
Compose-file audit (separate MCP: docker-compose-audit)

Sibling MCPs from Unbearable Labs

docker-compose-audit — same pattern for docker-compose.yml
hu-postcode-validator — Hungarian postcode lookup

Source / contact

Issues and ideas: unbearabledev@gmail.com or the GitHub org UnbearableDev.

Read the full README →View source on GitHub →

Related MCP Servers

View all in Security View all alternatives

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

npm downloads

482

Package downloads in the last 30 days.

Last commit

3mo ago

Most recent push to the default branch.

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Dockerfile Audit

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "dockerfile-audit": { "command": "uvx", "args": ["without"] } }

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Technical Specs & Signals

CategorySecurity

11/15 checks healthy over the last 46d

39Quality signal: Fair · 39/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools16/30

Adoption & activity3/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 7d ago via OSV.dev · without (PyPI)

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Documentation Overview

Dockerfile Security & Quality Audit

Hadolint-grade Dockerfile audit as an MCP server. 18+ checks across 5 categories, every finding ships with severity, line number, remediation text, and a copy-paste Dockerfile snippet.

Built by Unbearable Labs. Pay-per-event pricing — only billed when a tool is actually called.

Available on

Apify Actor Store — primary, metered usage (PPE)
MCPize — pending submission
MCP.so — pending submission
PulseMCP — pending submission
Smithery — pending submission
Glama — pending submission

Newsletter: Unbearable TechTips Weekly · All Actors: github.com/UnbearableDev

What it does

Point any MCP-capable client (Claude Desktop, Cursor, n8n, Make, Zapier, custom agents) at this server, hand it a Dockerfile, get back a structured report:

Severity — high / medium / low / info
Line number — exact location in the file
Description — what's wrong and why it matters
Remediation — what to do about it
Fix snippet — Dockerfile syntax you can paste directly

Tools

Tool	Purpose
`audit_dockerfile(dockerfile_content? \| dockerfile_url?, min_severity='low')`	Run all checks
`check_base_image(...)`	FROM/tag/digest/registry checks only
`check_instructions(...)`	CMD form, ADD vs COPY, MAINTAINER, etc.
`check_security(...)`	USER, sudo, chmod 777, curl\|bash, hardcoded secrets, HEALTHCHECK
`check_efficiency(...)`	apt cache hygiene, pip caching
`check_secrets(...)`	ARG with secret-pattern names
`list_checks(category?)`	Browse the full check catalog

Provide exactly one of dockerfile_content (paste the file) or dockerfile_url (HTTPS URL — e.g. GitHub raw).

Check catalog (v1: 18 checks across 5 categories)

ID	Category	Severity	Title
DFA-001	base_image	medium	Image uses :latest tag or no tag
DFA-002	base_image	info	No SHA256 digest pin on FROM
DFA-003	base_image	medium	Untrusted registry
DFA-010	instructions	low	CMD in shell form
DFA-011	instructions	low	ENTRYPOINT in shell form
DFA-012	instructions	info	MAINTAINER instruction is deprecated
DFA-013	instructions	medium	ADD used where COPY would suffice
DFA-020	security	medium	No USER directive (runs as root)
DFA-021	security	high	USER root set explicitly
DFA-022	security	high	sudo invoked in RUN
DFA-023	security	high	chmod 777 in RUN
DFA-024	security	medium	curl\|bash pattern in RUN
DFA-025	security	high	Hardcoded secret in ENV
DFA-027	security	low	No HEALTHCHECK
DFA-030	efficiency	low	apt-get update without install
DFA-031	efficiency	low	apt-get install without --no-install-recommends
DFA-032	efficiency	low	pip install without --no-cache-dir
DFA-040	secrets	medium	ARG with secret-pattern name

Use list_checks to get the canonical, up-to-date catalog.

Pricing

Event	USD
Any audit / check_* tool call	$0.02
`list_checks` discovery	$0.005

Example response (truncated)

config.json

{
  "summary": {
    "total_findings": 6,
    "by_severity": {"high": 2, "medium": 2, "low": 2, "info": 0}
  },
  "findings": [
    {
      "id": "DFA-021",
      "category": "security",
      "severity": "high",
      "instruction": "USER",
      "line_number": 3,
      "title": "USER root set explicitly",
      "description": "...",
      "remediation": "Switch to a non-root UID after any root-required RUN steps.",
      "fix_dockerfile_snippet": "USER 10001:10001",
      "references": ["CIS-Docker-4.1"]
    }
  ]
}

Connecting from Claude Desktop

config.json

{
  "mcpServers": {
    "dockerfile-audit": {
      "transport": "streamable-http",
      "url": "https://YOUR-ACTOR-URL.apify.actor/mcp"
    }
  }
}

Limits

Dockerfile size: 200 KB cap per audit
URL fetch: 5s timeout, max 3 redirects, HTTPS only
Session timeout: 5 minutes of inactivity

What's NOT covered (yet)

Live image vulnerability scanning (use Trivy / Grype for that)
Multi-stage build optimization analysis (DFA-004 / DFA-005 — roadmapped)
Compose-file audit (separate MCP: docker-compose-audit)

Sibling MCPs from Unbearable Labs

docker-compose-audit — same pattern for docker-compose.yml
hu-postcode-validator — Hungarian postcode lookup

Source / contact

Issues and ideas: unbearabledev@gmail.com or the GitHub org UnbearableDev.