S3

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Summary

Connects Claude to AWS S3 using the standard credential chain from your environment or ~/.aws/credentials. Exposes seven tools: list_buckets, list_objects, get_object, put_object, delete_object, presigned_url, and bucket_info. You can ask Claude to browse bucket contents with prefix filters, download config files as text, upload content directly, or generate temporary sharing links with custom expiration. Requires standard S3 permissions like s3:ListBuckets and s3:GetObject. Reach for this when you're already managing S3 from the CLI and want to hand off bucket operations to your assistant instead of remembering aws s3 syntax and flags.

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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).

MCP server for AWS S3 bucket management and file operations

_{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.

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}

License

Featured

CodeRabbit

AI writes the code. CodeRabbit catches the slop.

Try For Free →

Keep your Mac awake

Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.

One time payment $9 →

Context.dev

Integrate web data into your AI product. One API to scrape website & brand data.

Get API Key Now →

Make your agent a DeFi expert

Agent, run crypto. Access onchain data & trade routes via 1inch.

Install now →

Make money from your Skills

On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.

Start earning →

AppSignal

Monitor with ease. Code with confidence.

Start Free Trial →

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).

MCP server for AWS S3 bucket management and file operations

_{Demo built with remotion-readme-kit}

Why

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

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

mcp-server-s3

Why

Tools

Quick Start

Cursor

Claude Desktop

VS Code

Authentication

Example prompts

Development

See also

Author

License

S3

mcp-server-s3

Why

Tools

Quick Start

Cursor

Claude Desktop

VS Code

Authentication

Example prompts

Development

See also

Author

License

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