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OpenCode is an open-source coding agent that supports multiple LLM providers. E2B provides a pre-built opencode template with OpenCode already installed.

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CLI

Create a sandbox with the E2B CLI. 
e2b sbx create opencode
Once inside the sandbox, start OpenCode. 
opencode

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Run headless

Use opencode run for non-interactive mode. Pass your LLM provider’s API key as an environment variable — OpenCode supports ANTHROPIC_API_KEY, OPENAI_API_KEY, GEMINI_API_KEY, and others. 
import { Sandbox } from 'e2b'

const sandbox = await Sandbox.create('opencode', {
  envs: { ANTHROPIC_API_KEY: process.env.ANTHROPIC_API_KEY },
})

const result = await sandbox.commands.run(
  `opencode run "Create a hello world HTTP server in Go"`
)

console.log(result.stdout)
await sandbox.kill()

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Example: work on a cloned repository

import { Sandbox } from 'e2b'

const sandbox = await Sandbox.create('opencode', {
  envs: { ANTHROPIC_API_KEY: process.env.ANTHROPIC_API_KEY },
  timeoutMs: 600_000,
})

await sandbox.git.clone('https://github.com/your-org/your-repo.git', {
  path: '/home/user/repo',
  username: 'x-access-token',
  password: process.env.GITHUB_TOKEN,
  depth: 1,
})

const result = await sandbox.commands.run(
  `cd /home/user/repo && opencode run "Add error handling to all API endpoints"`,
  { onStdout: (data) => process.stdout.write(data) }
)

const diff = await sandbox.commands.run('cd /home/user/repo && git diff')
console.log(diff.stdout)

await sandbox.kill()

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Connect with the OpenCode SDK

OpenCode includes a headless HTTP server that you can control programmatically using the @opencode-ai/sdk client. Start the server inside a sandbox, get the public URL with sandbox.getHost(), and connect from your application. 
import { Sandbox } from 'e2b'
import { createOpencodeClient } from '@opencode-ai/sdk'

const sandbox = await Sandbox.create('opencode', {
  envs: { ANTHROPIC_API_KEY: process.env.ANTHROPIC_API_KEY },
  lifecycle: {
    onTimeout: 'pause', // "pause" | "kill"
  },
  timeoutMs: 10 * 60 * 1000,
})

// Start the OpenCode server
sandbox.commands.run('opencode serve --hostname 0.0.0.0 --port 4096', {
  background: true,
})

// Wait for the server to be ready
const host = sandbox.getHost(4096)
const baseUrl = `https://${host}`
while (true) {
  try {
    await fetch(`${baseUrl}/global/health`)
    break
  } catch {
    await new Promise((r) => setTimeout(r, 500))
  }
}

// Connect to the server
const client = createOpencodeClient({
  baseUrl,
})

// Create a session and send a prompt
const { data: session } = await client.session.create({
  body: { title: 'E2B Session' },
})
const { data: result } = await client.session.prompt({
  path: { id: session.id },
  body: {
    parts: [{ type: 'text', text: 'Create a hello world HTTP server in Go' }],
  },
})
console.log(result)

​
Build a custom template

If you need to customize the environment (e.g. pre-install dependencies, add config files), build your own template on top of the pre-built opencode template. 
// template.ts
import { Template, waitForPort } from 'e2b'

export const template = Template()
  .fromTemplate('opencode')
  .setEnvs({
    OPENCODE_SERVER_PASSWORD: 'your-password',
  })
  // Optional - start the OpenCode server on sandbox start
  .setStartCmd(
    'opencode serve --hostname 0.0.0.0 --port 4096',
    waitForPort(4096)
  )

// build.ts
import { Template, defaultBuildLogger } from 'e2b'
import { template as openCodeTemplate } from './template'

await Template.build(openCodeTemplate, 'my-opencode', {
  cpuCount: 2,
  memoryMB: 2048,
  onBuildLogs: defaultBuildLogger(),
})
Run the build script to create the template. 
npx tsx build.ts

Sandbox persistence

Auto-pause, resume, and manage sandbox lifecycle

Git integration

Clone repos, manage branches, and push changes

SSH access

Connect to the sandbox via SSH for interactive sessions