S3

Name: S3
Author: ofershap

by ofershapversion 1.0.1i★ 4iRuns on your computer

Registry nameio.github.ofershap/s3

Install

Overview

Description from the maker (original English)

AWS S3 MCP — list buckets, browse objects, upload/download, presigned URLs.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi2 of 2 passedChecked from public information; code not scanned yet
UsageiVery new↓ 139/wk · ★ 4

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Developer tools

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 2 of 2 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "s3": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-server-s3"
      ]
    }
  }
}

Run this in your terminal

claude mcp add s3 -- npx -y mcp-server-s3

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "s3": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-server-s3"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "s3": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mcp-server-s3"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 11, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account ofershap, which owns the repo
✓ Pass
Still maintained
Code last changed 3 months ago
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Developer toolsi

More stars than 82% of the other 5731 servers in this category
Published to the registry more recently than 6% of the other 5731 servers in this category
Basic checks equal to or better than 100% of the other 5731 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is S3 safe?

It passed 2 of 2 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 3 months ago, and the latest version (1.0.1) reached the registry 8 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: REA, Netdata, Front-End Checklist

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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Runs on your computer

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Real-time infrastructure monitoring with metrics, logs, alerts, and ML-based anomaly detection.

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Front-End Checklist

Review frontend code and live pages against 386 quality-gated web development rules.

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Runs in the cloud

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

mcp-server-s3

Manage AWS S3 buckets and objects from your AI assistant. Browse files, upload and download content, and generate presigned URLs.

npx mcp-server-s3

Works with Claude Desktop, Cursor, VS Code Copilot, and any MCP client. Uses your existing AWS credentials (~/.aws/credentials or environment variables).

Demo built with remotion-readme-kit

Why

S3 is the most widely used cloud storage service, but managing it from the command line means remembering aws s3 ls, aws s3 cp, presigned URL syntax, and various flags. Google has an official MCP for GCS, Cloudflare has one for R2, but AWS S3 doesn't have a polished standalone MCP server on npm. This one lets you ask your assistant to list buckets, download a config file, upload content, or generate a temporary sharing link. It uses the standard AWS credential chain, so if your CLI already works, this works too.

Tools

Tool	What it does
`list_buckets`	List all S3 buckets in your AWS account.
`list_objects`	List objects in a bucket, with optional prefix filter.
`get_object`	Download and read an object's content as text.
`put_object`	Upload text content to an S3 object.
`delete_object`	Delete an object from a bucket.
`presigned_url`	Generate a temporary presigned URL for an object.
`bucket_info`	Check if a bucket exists and get basic info.

Quick Start

Cursor

Add to .cursor/mcp.json:

"mcpServers": { "s3": { "command": "npx", "args": ["mcp-server-s3"], "env": { "AWS_REGION": "us-east-1", "AWS_ACCESS_KEY_ID": "your-access-key", "AWS_SECRET_ACCESS_KEY": "your-secret-key" } } } }

Claude Desktop

Add to claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/claude_desktop_config.json):

"mcpServers": { "s3": { "command": "npx", "args": ["mcp-server-s3"], "env": { "AWS_REGION": "us-east-1", "AWS_ACCESS_KEY_ID": "your-access-key", "AWS_SECRET_ACCESS_KEY": "your-secret-key" } } } }

VS Code

Configure the MCP server to run npx mcp-server-s3 with AWS_REGION, AWS_ACCESS_KEY_ID, and AWS_SECRET_ACCESS_KEY in the environment.

Authentication

The server uses the standard AWS credential chain:

Environment variables: AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_REGION
Shared credentials file: ~/.aws/credentials
IAM roles: when running on EC2, ECS, Lambda, or similar

Set AWS_REGION (defaults to us-east-1) and make sure your credentials have the necessary S3 permissions: s3:ListBuckets, s3:ListBucket, s3:GetObject, s3:PutObject, s3:DeleteObject, s3:HeadBucket.

Agent Plugins

This repo is an Agent Plugins 1.0.0 package: plugin.json, portable mcp.json, and skills/ ship together with the MCP server.

For Cursor, clone the repo and copy or symlink it to ~/.cursor/plugins/local/mcp-server-s3, then reload the window. Skills and MCP show up under Customize > Plugins.

Agent Plugins v1 does not ship OAuth or AWS SSO wiring. Set AWS_REGION and credentials via env or ~/.aws/credentials in the MCP client host. One-click install is not offered because secrets stay in env.

FAQ

What is mcp-server-s3?

An MCP server for S3: list buckets and objects, read/upload text objects, delete keys, presigned URLs, and bucket checks.

How does authentication work?

Standard AWS credential chain: env vars, shared credentials file, or IAM role on the machine running the MCP server.

Which env vars should I set in MCP config?

At minimum AWS_REGION. Often AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY unless you rely on ~/.aws/credentials or a role.

Can I install it as an Agent Plugin in Cursor?

Yes, via ~/.cursor/plugins/local/mcp-server-s3. Ensure the Cursor process can read the same AWS credentials as your CLI.

Why no one-click Cursor button?

AWS keys cannot be embedded in a portable install link. Use the JSON under Quick Start.

Example prompts

"List all my S3 buckets"
"Show me the files in my-bucket/uploads/"
"Download the config.json from my-bucket"
"Upload this content to my-bucket/notes.txt"
"Generate a presigned URL for this file that expires in 1 hour"

Development

npm install

npm run typecheck npm run build npm test npm run format npm run lint

Author

README built with README Builder

S3

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Which apps can use it

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Developer toolsi

Common questions

Alternatives

REA

Netdata

Front-End Checklist

README from the maker

mcp-server-s3

Why

Tools

Quick Start

Cursor

Claude Desktop

VS Code

Authentication

Agent Plugins

FAQ

What is mcp-server-s3?

How does authentication work?

Which env vars should I set in MCP config?

Can I install it as an Agent Plugin in Cursor?

Why no one-click Cursor button?

Example prompts

Development

See also

Author

License