The Node and .NET packages include the native runtime assets. The Rust crate builds the MXC SDK, engine, and selected backends into the consuming application.

Non-SDK consumption: Platform-specific executor binaries, such as wxc-exec.exe, accept JSON container-creation requests defined by the stable schema. Use for testing or when the SDK cannot be embedded in your app.

For complete SDK samples, see the Rust, .NET, and Node samples.

import { spawn, type ContainerRequest } from '@microsoft/mxc-sdk/v1';

const request: ContainerRequest = {
  command: 'node -e "console.log(\'hello from container\')"',
  network: { egress: { default: 'deny' } },
  timeoutMs: 30_000,
};

const child = await spawn(request);

See the runnable streaming standard-I/O sample and the SDK API reference.

Your application will hit access issues when running in a sandbox, until you've had time to tune your containment rules. We're here to help.

Native executors normally reserve standard input, output, and error for the workload. Use --debug for MXC diagnostic output:

wxc-exec.exe --debug config.json

See MXC diagnostics for the complete developer reference.

Warning: --audit turns off all sandbox security for the workload being analyzed. Never use it to run untrusted code.

Audit mode helps a policy author find access-denied failures and reconstruct a ProcessContainer policy that grants the files and capabilities a trusted tool actually needs. On supported Windows releases, run:

wxc-exec.exe --audit policy.json

MXC records the observed accesses and produces policy-authoring artifacts. See logging access denied for safe deny-and-record diagnostics, audit outputs, and supported workflows.

Official Microsoft builds can send optional diagnostic telemetry to Microsoft. Telemetry is off unless the individual run opts in, the Windows user has explicitly consented, administrative policy permits collection, and your application enables the telemetry option in a contained workload request. An administrator can block telemetry but cannot grant consent for the user.

Local open-source builds are not configured to route telemetry to Microsoft, and telemetry is a no-op on non-Windows platforms. See telemetry policy and consent for controls and privacy details.

Build from source when developing MXC, changing the native runtime, or using the standalone executor binaries instead of a packaged SDK. Repository builds produce the platform-native runtime and executors and stage the native assets used by the Node SDK.

Build prerequisites are:

• Rust, pinned to version 1.93 by src/rust-toolchain.toml
• Node.js 24 or later and npm
• The platform toolchain and prerequisites described by the selected backend

build.bat --all             # Release build for current architecture

./build.sh --all            # Release build

./build-mac.sh --all        # Release build for native architecture