Bolt.new AI and AWS S3 integration: Step-by-Step Guide 2025

You integrate Bolt.new AI with AWS S3 the same way you integrate any Node.js app with S3: by installing the official AWS SDK inside your Bolt project, providing valid AWS credentials through Bolt environment variables, and then writing code that uses the SDK to upload, download, or list objects. Bolt itself does not have a built‑in S3 connector — it simply hosts your code and gives you a runtime where you can call external APIs like AWS. What matters is: you install the AWS SDK, configure credentials, set permissions correctly in AWS (IAM), and write your integration code inside Bolt’s server-side files such as server.js or an API route.

 

What Bolt.new Actually Is (And Is Not)

 

Bolt.new is a browser-based AI workspace that generates and runs real full-stack code. It's basically a cloud dev environment with:

• A Node.js server runtime where you can install npm packages.
• A frontend dev server (React/Next/Vite/etc.).
• Environment variables for storing API keys securely.

Bolt does not auto-connect to AWS. You explicitly integrate via AWS’s REST/SDK mechanisms.

 

Step-by-Step: Integrating Bolt.new with AWS S3

 

The pattern is always:

• Install AWS SDK
• Provide AWS credentials via Bolt environment variables
• Write backend code that calls S3
• Call that backend route from your UI if needed

 

Step: Install AWS SDK in Bolt

 

npm install @aws-sdk/client-s3

This is AWS’s modern v3 SDK.

 

Step: Add Environment Variables in Bolt.new

 

In Bolt, go to the Environment Variables panel and create:

• AWS_ACCESS_KEY\_ID
• AWS_SECRET_ACCESS\_KEY
• AWS\_REGION
• S3_BUCKET_NAME

These map to a real IAM user or IAM role inside AWS with S3 permissions. Create an IAM user manually in AWS and give it a policy like AmazonS3FullAccess or a minimal custom policy.

 

Step: Write a Simple Backend Integration (Node.js inside Bolt)

 

Create or edit your backend file (for example server.js or an API route like /api/upload depending on your Bolt scaffold). Here is a minimal, valid upload function:

import { S3Client, PutObjectCommand } from "@aws-sdk/client-s3";

const s3 = new S3Client({
  region: process.env.AWS_REGION, // Must match your AWS bucket region
  credentials: {
    accessKeyId: process.env.AWS_ACCESS_KEY_ID,      // Securely pulled from Bolt env vars
    secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY
  }
});

// Example Express route in Bolt
export async function uploadFile(req, res) {
  try {
    // req.body.fileContent should contain the actual file data (e.g. base64 or raw)
    const command = new PutObjectCommand({
      Bucket: process.env.S3_BUCKET_NAME,
      Key: "example.txt",
      Body: req.body.fileContent, // Should be a Buffer or string
      ContentType: "text/plain"
    });

    await s3.send(command);

    res.json({ ok: true, message: "Uploaded to S3 successfully!" });
  } catch (err) {
    console.error("S3 upload error:", err);
    res.status(500).json({ ok: false, error: err.message });
  }
}

 

Step: Call the Backend Route From the Frontend

 

In your React/Vite frontend inside Bolt, you call your API route:

async function upload() {
  const response = await fetch("/api/upload", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({
      fileContent: "Hello from Bolt!" // Example; normally you'd send actual file binary
    })
  });

  const data = await response.json();
  console.log(data);
}

 

Key Concepts Explained Simply

 

• SDK: A code library that lets your app talk to a service (like AWS S3) without manually doing HTTP calls.
• Environment variables: Secret values you store outside your code so they aren’t leaked.
• IAM: AWS identity system that controls what your code can do. You must give your credentials permission to read/write S3.
• Bucket: A storage container in S3; all objects live inside one.

 

Security Notes

 

• Never hard-code AWS keys in your Bolt code.
• Use the least-permission IAM policy possible.
• Use HTTPS API routes to avoid exposing file content.

 

What Changes When You Deploy Outside Bolt

 

• You still use the exact same AWS SDK code.
• You just move the environment variables into your real hosting environment (e.g. Vercel, Render, AWS Lambda).
• Consider switching from access keys to proper IAM roles if deploying inside AWS.

 

That's the complete, real, production-valid way to integrate Bolt.new with AWS S3: install the AWS SDK in Bolt, store AWS keys in Bolt environment variables, build a backend route that calls AWS, and let your frontend talk to that backend. Nothing magical — just clean, standard API integration.