AWS S3 MCP Server

What it does

Bridges AI assistants to AWS S3, exposing full bucket and object management as MCP tools. Ask Claude or Cursor to list buckets, upload files, download objects, or manage bucket policies — all through natural language without writing AWS CLI commands.

Tools

• list_buckets — List all S3 buckets in the account
• create_bucket — Create a new S3 bucket with optional region
• delete_bucket — Delete an empty S3 bucket
• list_objects — List objects in a bucket with optional prefix filter and pagination
• upload_object — Upload a file or string content to a bucket
• download_object — Download an object from a bucket to local path or inline
• delete_object — Delete an object from a bucket
• get_bucket_policy — Get the IAM policy attached to a bucket
• set_bucket_policy — Set or update a bucket's IAM policy

Installation

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "aws-s3": {
      "command": "npx",
      "args": ["@gangadharrr/aws-s3"],
      "env": {
        "AWS_REGION": "us-east-1",
        "AWS_ACCESS_KEY_ID": "your-access-key-id",
        "AWS_SECRET_ACCESS_KEY": "your-secret-access-key"
      }
    }
  }
}

For local dev with existing AWS CLI credentials, omit the key env vars and just set AWS_REGION.

Supported hosts

Claude Desktop, Cursor