Development

Dockerfile Linter & Best-Practices Checker

Hadolint-style static analysis for Dockerfiles without a Docker daemon: 30+ rules across image pinning, package-manager hygiene, layer caching, secrets and signal handling, with severities, line numbers and fix examples.

html· HTML resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/dockerfile-linter' \
  -H 'Content-Type: application/json' \
  -d '{"dockerfile":"FROM ubuntu:latest\nMAINTAINER [email protected]\nRUN apt-get update && apt-get install -y curl wget\nRUN cd /app && sudo cp x y\nADD app.py /app/app.py\nCOPY . .\nENV PASSWORD=secret123\nEXPOSE 70000\nCMD npm start\nUSER root","severityFloor":"info","checkHealthcheck":true}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/dockerfile-linter

Parameters

Name	Type	Required	Description
dockerfile	textarea	Yes	—
severityFloor	select	No	—
checkHealthcheck	checkbox	No	—

Response format

HTML result

JSON

{
  "result": "<div>Processed HTML content</div>",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-dockerfile-linter": {
      "name": "dockerfile-linter",
      "description": "Hadolint-style static analysis for Dockerfiles without a Docker daemon: 30+ rules across image pinning, package-manager hygiene, layer caching, secrets and signal handling, with severities, line numbers and fix examples.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=dockerfile-linter",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "dockerfile-linter",
    "arguments": {
  "dockerfile": "FROM ubuntu:latest\nMAINTAINER [email protected]\nRUN apt-get update && apt-get install -y curl wget\nRUN cd /app && sudo cp x y\nADD app.py /app/app.py\nCOPY . .\nENV PASSWORD=secret123\nEXPOSE 70000\nCMD npm start\nUSER root",
  "severityFloor": "info",
  "checkHealthcheck": true
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Browse tools Open tool

curl -X POST 'https://api.elysiatools.com/en/api/tools/dockerfile-linter' \ -H 'Content-Type: application/json' \ -d '{"dockerfile":"FROM ubuntu:latest\nMAINTAINER [email protected]\nRUN apt-get update && apt-get install -y curl wget\nRUN cd /app && sudo cp x y\nADD app.py /app/app.py\nCOPY . .\nENV PASSWORD=secret123\nEXPOSE 70000\nCMD npm start\nUSER root","severityFloor":"info","checkHealthcheck":true}'

Name

Type

Required

Description

dockerfile

textarea

Yes

—

severityFloor

select

—

checkHealthcheck

checkbox

—

{ "mcpServers": { "elysiatools-dockerfile-linter": { "name": "dockerfile-linter", "description": "Hadolint-style static analysis for Dockerfiles without a Docker daemon: 30+ rules across image pinning, package-manager hygiene, layer caching, secrets and signal handling, with severities, line numbers and fix examples.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=dockerfile-linter", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "dockerfile-linter", "arguments": { "dockerfile": "FROM ubuntu:latest\nMAINTAINER [email protected]\nRUN apt-get update && apt-get install -y curl wget\nRUN cd /app && sudo cp x y\nADD app.py /app/app.py\nCOPY . .\nENV PASSWORD=secret123\nEXPOSE 70000\nCMD npm start\nUSER root", "severityFloor": "info", "checkHealthcheck": true } } }