E2B is an open-source runtime for executing AI-generated code in secure cloud sandboxes. Made for agentic & AI use cases. You can read more about it here.

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Installation

First, install the E2B provider package: 
npm install @vibe-kit/e2b

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How to use

To use E2B with VibeKit, you need to configure E2B when creating a new VibeKit instance. You can get your API key from the E2B dashboard.

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Using the provider directly

import { VibeKit } from "@vibe-kit/sdk";
import { createE2BProvider } from "@vibe-kit/e2b";

const e2bProvider = createE2BProvider({
  apiKey: process.env.E2B_API_KEY!,
  templateId: "vibekit-claude", // Optional custom template
});

const vibeKit = new VibeKit()
  .withAgent({
    type: "claude",
    provider: "anthropic",
    apiKey: process.env.ANTHROPIC_API_KEY!,
    model: "claude-sonnet-4-20250514",
  })
  .withSandbox(e2bProvider);

// Generate code
const result = await vibeKit.generateCode({ 
  prompt: "Create a simple web server", 
  mode: "ask" 
});

// Get host URL (if applicable)
const host = await vibeKit.getHost(3000);

// Clean up
await vibeKit.kill();

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Using configuration object

import { VibeKit, VibeConfig } from "@vibe-kit/sdk";

const config: VibeConfig = {
  ...,
  environment: {
    e2b: {
      // Required E2B API key
      apiKey: "e2b_****",
      // Optional custom E2B template you want to use 
      // that has the codex CLI and Git installed.
      templateId: "super-codex" 
    },
  },
};

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ENV variables and secrets

You can use environment variables for your E2B configuration: 
E2B_API_KEY=your_e2b_api_key_here
Then reference them in your code: 
const e2bProvider = createE2BProvider({
  apiKey: process.env.E2B_API_KEY!,
  templateId: "vibekit-claude",
});