Installation

CloudMock is a single binary with zero external dependencies. Pick the install method that fits your workflow.

npx (quickest)

Run without installing:

npx cloudmock start

This downloads the latest release binary and starts the gateway. No global install required.

Snap (Linux)

sudo snap install cloudmock
cloudmock start

Homebrew (macOS / Linux)

brew install viridian-inc/tap/cloudmock
cloudmock start

To upgrade later:

brew upgrade cloudmock

Docker

docker run -p 4566:4566 -p 4500:4500 ghcr.io/Viridian-Inc/cloudmock:latest

To run in the background:

docker run -d --name cloudmock -p 4566:4566 -p 4500:4500 ghcr.io/Viridian-Inc/cloudmock:latest

With Docker Compose, add this to your docker-compose.yml:

services:
  cloudmock:
    image: ghcr.io/Viridian-Inc/cloudmock:latest
    ports:
      - "4566:4566"
      - "4500:4500"

Then docker compose up -d.

Shell installer (macOS / Linux)

curl -fsSL https://cloudmock.dev/install.sh | bash
cloudmock start

apt (Debian / Ubuntu)

curl -LO https://github.com/Viridian-Inc/cloudmock/releases/download/v1.0.3/cloudmock_1.0.3_amd64.deb && sudo apt install cloudmock_1.0.3_amd64.deb
cloudmock start

ARM64:

curl -LO https://github.com/Viridian-Inc/cloudmock/releases/download/v1.0.3/cloudmock_1.0.3_arm64.deb && sudo apt install cloudmock_1.0.3_arm64.deb

go install (from source)

Requires Go 1.26 or later:

go install github.com/Viridian-Inc/cloudmock/cmd/gateway@latest
cloudmock start

System requirements

Platform	Support
macOS (arm64, amd64)	Native binary
Linux (arm64, amd64)	Native binary
Windows	Docker (recommended), or WSL2 with the Linux binary

CloudMock has no runtime dependencies. No database, no JVM, no Docker requirement (unless you choose the Docker install method).

Verify it works

After starting CloudMock, you should see output like this:

Starting cloudmock gateway (config=cloudmock.yml)

  AWS Gateway:  http://localhost:4566
  Dashboard:    http://localhost:4500
  Admin API:    http://localhost:4599

  Profile:      minimal (8 services)
  IAM mode:     enforce
  Persistence:  off

  Ready.

The gateway listens on three ports:

Port	Purpose
4566	AWS API endpoint — point your SDKs and CLI here
4500	Web dashboard for inspecting services and resources
4599	Admin API for health checks, resets, and configuration

Configuration

CloudMock reads configuration from cloudmock.yml in the working directory. The defaults work for most use cases. See the Configuration Reference for all options.

Common overrides via environment variables:

# Change ports
CLOUDMOCK_GATEWAY_PORT=5566 cloudmock start

# Use a different service profile
CLOUDMOCK_PROFILE=standard cloudmock start

# Disable IAM enforcement for quick prototyping
CLOUDMOCK_IAM_MODE=none cloudmock start

Try the demo

Clone the example project and run it in under a minute:

git clone https://github.com/Viridian-Inc/cloudmock-todo-demo.git
cd cloudmock-todo-demo/node
npx cloudmock &
npm install && npx tsx quickstart.ts

See the full demo project for Python and Go examples.

Next step

You have CloudMock running. Now make your first request.