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

To integrate Bolt.new with Amazon S3, you simply use normal AWS S3 APIs from your Bolt.new server code. Bolt.new does not have any special built‑in “S3 connector” — you interact with S3 the same way any Node.js backend would: install AWS SDK, load credentials from environment variables, then call S3’s REST APIs through the SDK. The only important part is that you must set AWS credentials inside Bolt.new’s environment variables, because Bolt’s runtime does not allow storing secrets directly in source code. Once credentials are present, you can upload, download, list, and delete files in S3 from any Bolt.new server route.

 

What You Actually Do

 

Integrating Bolt.new AI with Amazon S3 means: your Bolt.new server code uses the AWS SDK for JavaScript to talk to S3 over HTTPS. Bolt.new itself doesn’t “connect” to S3 — your app connects to S3 using standard AWS credentials.

You only need:

• AWS access key (Access Key ID + Secret Access Key)
• An S3 bucket you want to read/write
• Bolt.new environment variables where you store the keys
• A small Node.js server file (typically in /server or api routes) that uses AWS SDK

 

Step‑by‑Step: How to Integrate Bolt.new with S3

 

This is the clean, real-world flow a senior engineer uses.

• Create an S3 bucket in AWS. Nothing special here — default settings are fine for testing.
• Create an IAM user with programmatic access. This gives you an Access Key ID + Secret Access Key. Do not use your root AWS keys.
• Go to Bolt.new → Environment Variables (left sidebar). Add:
  AWS_ACCESS_KEY\_ID
  AWS_SECRET_ACCESS\_KEY
  AWS\_REGION
  S3_BUCKET_NAME
• Install AWS SDK inside Bolt.new:

npm install @aws-sdk/client-s3

• Create a simple S3 client in your Bolt.new backend route.

 

Example: Working S3 Upload From Bolt.new Server

 

This is actual, real, production-valid Node.js code using AWS SDK v3.

// server/s3.js

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

// Configure the AWS S3 client using environment variables
const s3 = new S3Client({
  region: process.env.AWS_REGION,        // e.g. "us-east-1"
  credentials: {
    accessKeyId: process.env.AWS_ACCESS_KEY_ID,       // stored in Bolt.new env
    secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY
  }
});

// Example function to upload a file to S3
export async function uploadFileToS3(localFilePath, targetKey) {
  const fileStream = fs.createReadStream(localFilePath); // read local file

  const command = new PutObjectCommand({
    Bucket: process.env.S3_BUCKET_NAME,  // bucket name from env vars
    Key: targetKey,                      // path in S3
    Body: fileStream
  });

  await s3.send(command);
  return `Uploaded to s3://${process.env.S3_BUCKET_NAME}/${targetKey}`;
}

 

Example: Expose an API route in Bolt.new that uploads something

 

// server/routes/upload.js

import express from "express";
import { uploadFileToS3 } from "../s3.js";
import path from "path";

const router = express.Router();

router.get("/demo-upload", async (req, res) => {
  try {
    const localFile = path.join(process.cwd(), "example.txt"); // some demo file
    const result = await uploadFileToS3(localFile, "uploads/example.txt");
    res.json({ success: true, message: result });
  } catch (err) {
    res.status(500).json({ success: false, error: err.message });
  }
});

export default router;

 

How This Works in Bolt.new

 

Bolt.new runs your Node.js backend exactly like a normal Express server. When your route calls uploadFileToS3(), it performs a normal HTTPS request to AWS S3 using the AWS SDK. Nothing magical — just proper API calls with credentials stored safely in environment variables.

• Bolt.new never stores your AWS credentials in code.
• The AWS SDK handles signature signing (SigV4) behind the scenes.
• Your app talks directly to S3 as if it were running on any cloud server.

 

Common Pitfalls to Avoid

 

• Never hardcode AWS keys in Bolt.new files — put them in environment variables.
• Use correct AWS region. If S3 bucket is in us-west-2 but you use us-east-1, uploads fail silently.
• Ensure IAM permissions include s3:PutObject and s3:GetObject.
• Remember Bolt.new file storage is ephemeral — if you need durable storage, S3 is the right choice.

 

Summary

 

Integrating Bolt.new AI with Amazon S3 is exactly the same as integrating any Node.js backend: store AWS credentials in Bolt environment variables, install the AWS SDK, instantiate an S3 client in code, and call its methods (upload, download, list, delete). Bolt.new doesn’t magically connect to S3 — your server code does. With the examples above, you have a fully working S3 integration you can scaffold, test, and deploy.