sandboxjs

A unified interface for Linux-based cloud sandbox providers. It can be used to create the building blocks of AI agents that run code or perform other potentially unsafe operations.

Usage

import { Sandbox } from "@gitwit/sandbox";

// Create a new sandbox
const sandbox = await Sandbox.create("daytona"); // or "codesandbox" or "e2b" or "modal"

// Create a sandbox with custom template
const customSandbox = await Sandbox.create("e2b", { template: "my-template-id" });

// Connect to an existing sandbox
// const sandbox = await Sandbox.connect("daytona", "sandbox_id");

// Run commands and interact with the sandbox
const { output } = await sandbox.runCommand("echo 'hello world'");
console.log(output);
console.log(await sandbox.listFiles("/"));

// Suspend, resume and destroy the sandbox
await sandbox.suspend();
await sandbox.resume();
await sandbox.destroy();

Provider Support

Provider	File Persistence	Memory Persistence	Read/Write Files	Recursive Delete	Directory Watch	Preview URLs	Pseudo-terminals	Env Variables	Destroy Sandbox	Build Templates
E2B	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
Daytona	✅	❌	✅	❌	❌	✅	❌	✅	✅	✅
CodeSandbox	✅	✅	✅	✅	✅	✅	✅	❌	❌	🚧
Modal	✅	❌	✅	❌	❌	✅	❌	❌	✅	🚧

Getting Started

1. Set up environment variables

Create a .env file in the root directory of the project and add at least one of the following environment variables:

# Get an E2B API key here: https://e2b.dev/dashboard
E2B_API_KEY=
# Get a Daytona API key here: https://app.daytona.io/dashboard/keys
DAYTONA_API_KEY=
# Get a CodeSandbox API key here: https://codesandbox.io/t
CODESANDBOX_API_KEY=
# Get a Modal API token here: https://modal.com/settings/tokens
MODAL_TOKEN_ID=
MODAL_TOKEN_SECRET=

2. Install dependencies

npm install

3. Build the project

Compiles the TypeScript source files to JavaScript in the dist/ directory.

npm run build

4. Run the example

After building, run the example script:

node dist/example.js

5. Run tests

To run the test suite:

npm test

Methods

create

// Create default sandbox
const sandbox = await Sandbox.create("daytona"); // or "codesandbox" or "e2b" or "modal"

// Create sandbox with additional parameters
const e2bSandbox = await Sandbox.create("e2b", {
  template: "my-template-id",
  envs: { KEY: "value" }
});

connect

const sandbox = await Sandbox.connect("daytona", "sandbox_id");

runCommand

Execute commands in the sandbox with support for background execution and command options.

// Basic command execution
const { exitCode, output } = await sandbox.runCommand("echo 'hello world'");
console.log(output); // "hello world"
console.log(exitCode); // 0

// Command with options
const result = await sandbox.runCommand("ls -la", {
  cwd: "/tmp",
  envs: { MY_VAR: "value" },
  timeoutMs: 5000
});

// Background command execution
const { pid } = await sandbox.runCommand("sleep 10", { background: true });
console.log(`Background process started with PID: ${pid}`);

suspend

await sandbox.suspend();

resume

await sandbox.resume();

destroy

await sandbox.destroy();

readFile

console.log(await sandbox.readFile("/path/to/file"));

writeFile

await sandbox.writeFile("/path/to/file", "content");

listFiles

console.log(await sandbox.listFiles("/path/to/directory"));

moveFile

await sandbox.moveFile("/path/to/file", "/path/to/new/file");

deleteFile

await sandbox.deleteFile("/path/to/file");

createDirectory

await sandbox.createDirectory("/path/to/directory");

getPreviewUrl

console.log(await sandbox.getPreviewUrl(8080));

createTerminal

const terminal = await sandbox.createTerminal();

Terminal Methods

await terminal.write("echo 'hello world'");
await terminal.resize(80, 24);
await terminal.kill();

Template Building

Build custom templates from your projects in a unified way across all providers.

Note: Your project directory must contain a Dockerfile (or *.Dockerfile file).

Build E2B template

import { buildTemplate } from "@gitwit/sandbox";

await buildTemplate('e2b', './my-project', 'my-template', {
  cpuCount: 2,
  memoryMB: 1024,
  teamId: 'your-team-id'
});

// Use built template
const sandbox = await Sandbox.create('e2b', { template: 'my-template' });

Build Daytona snapshot

import { buildTemplate } from "@gitwit/sandbox";

await buildTemplate('daytona', './my-project', 'my-snapshot', {
  cpu: 2,
  memory: 4,
  disk: 10
});

// Use built template
const sandbox = await Sandbox.create('daytona', { template: 'my-snapshot' });

Future Plans

• Add support for watching file system changes
• Add support for running code