Containerfile

Dockerfile Reference

The Dockerfile format reference maintained by Docker. Containerfile is a strict superset of Dockerfile, so the Dockerfile reference covers the same instruction set with Docker-specific extensions such as directives like syntax= and check=.

GitHub

Documentation

📖
Documentation
https://docs.docker.com/build/

Other Resources

🔗
Specification
https://docs.docker.com/reference/dockerfile/
🔗
Reference
https://docs.docker.com/build/buildkit/

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/dockerfile-reference"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑ 
aid: containerfile:dockerfile-reference
name: Dockerfile Reference
description: The Dockerfile format reference maintained by Docker. Containerfile is a strict superset
  of Dockerfile, so the Dockerfile reference covers the same instruction set with Docker-specific extensions
  such as directives like syntax= and check=.
humanURL: https://docs.docker.com/reference/dockerfile/
baseURL: https://docs.docker.com
tags:
- Docker
- Dockerfile
- Reference
properties:
- type: Specification
  url: https://docs.docker.com/reference/dockerfile/
- type: Documentation
  url: https://docs.docker.com/build/
- type: Reference
  url: https://docs.docker.com/build/buildkit/
x-features:
- Authoritative Dockerfile reference for all instructions
- Directives such as syntax= and check= for builder behavior
- BuildKit-specific RUN --mount syntax
- Linting rules via the Dockerfile checker
x-useCases:
- Authoring Dockerfiles or Containerfiles for Docker BuildKit
- Looking up the exact syntax of an instruction or flag
- Adopting newer BuildKit features like SSH mounts