🧡 Cloudflare Vibe SDK

An open source full-stack AI webapp generator – Deploy your own instance of Cloudflare VibeSDK, an AI vibe coding platform that you can run and customize yourself.

🚀 Live Demo

build.cloudflare.dev

Explore VibeSDK Build before deploying your own stack.

👆 Click to deploy your own instance!

Follow the setup guide below to configure required services

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✨ What is Cloudflare VibeSDK?

Cloudflare VibeSDK is an open source AI vibe coding platform built on Cloudflare's developer platform. If you're building an AI-powered platform for building applications, this is a great example that you can deploy and customize to build the whole platform yourself. Once the platform is deployed, users can say what they want to build in natural language, and the AI agent will create and deploy the application.

🌐 Experience it live at build.cloudflare.dev – Try it out before deploying your own instance!

🎯 Perfect For

Companies building AI-powered platforms

Run your own solution that allows users to build applications in natural language. Customize the AI behavior, control the generated code patterns, integrate your own component libraries, and keep all customer data within your infrastructure. Perfect for startups wanting to enter the AI development space or established companies adding AI capabilities to their existing developer tools.

Internal development

Enable non-technical teams to create the tools they need without waiting for engineering resources. Marketing can build landing pages, sales can create custom dashboards, and operations can automate workflows, all by describing what they want.

SaaS platforms

Let your customers extend your product's functionality without learning your API or writing code. They can describe custom integrations, build specialized workflows, or create tailored interfaces specific to their business needs.

🎯 Key Features

🤖 AI Code Generation – Phase-wise development with intelligent error correction
⚡ Live Previews – App previews running in sandboxed containers
💬 Interactive Chat – Guide development through natural conversation
📱 Modern Stack – Generates React + TypeScript + Tailwind apps
🚀 One-Click Deploy – Deploy generated apps to Workers for Platforms
📦 GitHub Integration – Export code directly to your repositories

🏗️ Built on Cloudflare's Platform

Cloudflare VibeSDK Build utilizes the full Cloudflare developer ecosystem:

Frontend: React + Vite with modern UI components
Backend: Workers with Durable Objects for AI agents
Database: D1 (SQLite) with Drizzle ORM
AI: Multiple LLM providers via AI Gateway
Containers: Sandboxed app previews and execution
Storage: R2 buckets for templates, KV for sessions
Deployment: Workers for Platforms with dispatch namespaces

SDK for Programmatic Access

Build apps programmatically using the official TypeScript SDK:

npm install @cf-vibesdk/sdk

import { PhasicClient } from '@cf-vibesdk/sdk';

const client = new PhasicClient({
  baseUrl: 'https://build.cloudflare.dev',
  apiKey: process.env.VIBESDK_API_KEY!,
});

const session = await client.build('Build a simple hello world page.', {
  projectType: 'app',
  autoGenerate: true,
});

await session.wait.deployable();
console.log('Preview URL:', session.state.previewUrl);
session.close();

SDK Documentation - Full API reference and examples

📋 Quick Deploy Checklist

Before clicking "Deploy to Cloudflare", have these ready:

✅ Prerequisites

Cloudflare Workers Paid Plan
Workers for Platforms subscription
Advanced Certificate Manager (needed when you map a first-level subdomain such as abc.xyz.com so Cloudflare can issue the required wildcard certificate for preview apps on *.abc.xyz.com)

🔑 Required API Key

Google Gemini API Key - Get from ai.google.dev

Once you click "Deploy to Cloudflare", you'll be taken to your Cloudflare dashboard where you can configure your VibeSDK deployment with these variables.

🔑 What you'll configure

GOOGLE_AI_STUDIO_API_KEY - Your Google Gemini API key for Gemini models
JWT_SECRET - Secure random string for session management
WEBHOOK_SECRET - Webhook authentication secret
SECRETS_ENCRYPTION_KEY - Encryption key for secrets
SANDBOX_INSTANCE_TYPE - Container performance tier (optional, see section below)
ALLOWED_EMAIL - Email address of the user allowed to use the app. This is used to verify the user's identity and prevent unauthorized access.
CUSTOM_DOMAIN - Custom domain for your app that you have configured in Cloudflare (Required). If you use a first-level subdomain such as abc.xyz.com, make sure the Advanced Certificate Manager add-on is active on that zone.

Custom domain DNS setup

To serve preview apps correctly, add the following DNS record in the zone that hosts CUSTOM_DOMAIN:

Type: CNAME
Name: *.abc
Target: abc.xyz.com (replace with your base custom domain or another appropriate origin)
Proxy status: Proxied (orange cloud)

Adjust the placeholder abc/xyz parts to match your domain. DNS propagation can take time—expect it to take up to an hour before previews resolve. This step may be automated in a future release, but it is required today.

🏗️ Sandbox Instance Configuration (Optional)

VibeSDK uses Cloudflare Containers to run generated applications in isolated environments. You can configure the container performance tier based on your needs and Cloudflare plan.

Available Instance Types

📢 Updated Oct 2025: Cloudflare now offers larger container instance types with more resources!

| Instance Type | Memory | CPU | Disk | Use Case | Availability | |---------------|--------|-----|------|----------|--------------| | lite (alias: dev) | 256 MiB | 1/16 vCPU | 2 GB | Development/testing | All plans | | standard-1 (alias: standard) | 4 GiB | 1/2 vCPU | 8 GB | Light production apps | All plans | | standard-2 | 8 GiB | 1 vCPU | 12 GB | Medium workloads | All plans | | standard-3 | 12 GiB | 2 vCPU | 16 GB | Production apps | All plans (Default) | | standard-4 | 12 GiB | 4 vCPU | 20 GB | High-performance apps | All plans |

Configuration Options

Option A: Via Deploy Button (Recommended) During the "Deploy to Cloudflare" flow, you can set the instance type as a build variable:

Variable name: SANDBOX_INSTANCE_TYPE
Recommended values:
- Standard/Paid users: standard-3 (default, best balance)
- High-performance needs: standard-4

Option B: Via Environment Variable For local deployment or CI/CD, set the environment variable:

export SANDBOX_INSTANCE_TYPE=standard-3  # or standard-4, standard-2, standard-1, lite
bun run deploy

Instance Type Selection Guide

For All Users:

standard-3 (Recommended) - Best balance for production apps with 2 vCPU and 12 GiB memory
standard-4 - Maximum performance with 4 vCPU for compute-intensive applications

What This Affects

The SANDBOX_INSTANCE_TYPE controls:

App Preview Performance - How fast generated applications run during development
Build Process Speed - Container compile and build times
Concurrent App Capacity - How many apps can run simultaneously
Resource Availability - Memory and disk space for complex applications

💡 Pro Tip: Start with standard-3 (the new default) for the best balance of performance and resources. Upgrade to standard-4 if you need maximum CPU performance for compute-intensive applications.

🔗 Post-Deployment: OAuth Setup (Optional)

OAuth configuration is not shown on the initial deploy page. If you want user login features, you'll need to set this up after deployment:

How to Add OAuth After Deployment:

Find your repository in your GitHub/GitLab account (created by "Deploy to Cloudflare" flow)
Clone locally and run bun install
Create .dev.vars and .prod.vars files (see below for OAuth configuration)
Run bun run deploy to update your deployment

Google OAuth Setup:

Google Cloud Console → Create Project
Enable Google+ API
Create OAuth 2.0 Client ID
Add authorized origins: https://your-custom-domain.
Add redirect URI: https://your-worker-name.workers.dev/api/auth/callback/google

Add to both .dev.vars (for local development) and .prod.vars (for deployment):

GOOGLE_CLIENT_ID="your-google-client-id"
GOOGLE_CLIENT_SECRET="your-google-client-secret"

GitHub OAuth Setup:

GitHub → Settings → Developer settings → OAuth Apps
Click New OAuth App
Application name: Cloudflare VibeSDK
Homepage URL: https://your-worker-name.workers.dev
Authorization callback URL: https://your-worker-name.workers.dev/api/auth/callback/github