What is Aws Ow S3 Mcp

aws-ow-s3-mcp is an MCP Server designed for AWS S3 operations, enabling secure access to S3 buckets through pre-signed URLs.

Use cases

Use cases include generating temporary access links for users to download files, uploading files securely from client applications, and managing S3 bucket contents programmatically.

How to use

To use aws-ow-s3-mcp, set the required environment variables such as BUCKET_NAME and REGION, and run the server using Docker or NPX commands as specified in the README.

Key features

Key features include listing S3 bucket objects, generating pre-signed URLs for retrieving and uploading objects, and deleting objects from the bucket.

Where to use

aws-ow-s3-mcp is suitable for applications that require secure and efficient access to AWS S3 storage, such as web applications, data processing pipelines, and cloud-based services.

AWS S3 MCP Server

MCP Server for AWS S3 operations, providing secure access to S3 buckets through pre-signed URLs.

Tools

1. list_objects

   • List objects in an S3 bucket
   • Input:
     • prefix (string, optional): Prefix filter for object keys
   • Returns: Array of objects with keys, sizes, and last modified dates

2. get_object

   • Generate a pre-signed URL for accessing an object
   • Inputs:
     • key (string, required): Object key to retrieve
     • expiry (number, optional): URL expiration time in seconds (default: 3600)
   • Returns: object_url containing the pre-signed URL

3. put_object

   • Generate a pre-signed URL for uploading an object
   • Inputs:
     • key (string, required): Object key to upload
     • expiry (number, optional): URL expiration time in seconds (default: 3600)
   • Returns: upload_url containing the pre-signed URL

4. delete_object

   • Delete an object from the bucket
   • Input:
     • key (string, required): Object key to delete
   • Returns: success boolean indicating deletion status

Setup

Environment Variables

The server requires the following environment variables:

• BUCKET_NAME: The name of your S3 bucket (required)
• REGION: AWS region (default: “ap-southeast-1”)

AWS credentials should be configured using standard AWS credential configuration methods (environment variables, IAM roles, or AWS credentials file).

Usage with Claude Desktop

Add the following to your claude_desktop_config.json:

{
  "mcpServers": {
    "aws-ow-s3-mcp": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "BUCKET_NAME",
        "-e",
        "REGION",
        "-e",
        "AWS_ACCESS_KEY_ID",
        "-e",
        "AWS_SECRET_ACCESS_KEY",
        "mcp/aws-ow-s3-mcp"
      ],
      "env": {
        "BUCKET_NAME": "<YOUR_BUCKET_NAME>",
        "REGION": "<AWS_REGION>",
        "AWS_ACCESS_KEY_ID": "<YOUR_ACCESS_KEY>",
        "AWS_SECRET_ACCESS_KEY": "<YOUR_SECRET_KEY>"
      }
    }
  }
}

NPX Command

{
  "mcpServers": {
    "aws-ow-s3-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-aws-ow-s3-mcp"
      ],
      "env": {
        "BUCKET_NAME": "<YOUR_BUCKET_NAME>",
        "REGION": "<AWS_REGION>",
        "AWS_ACCESS_KEY_ID": "<YOUR_ACCESS_KEY>",
        "AWS_SECRET_ACCESS_KEY": "<YOUR_SECRET_KEY>"
      }
    }
  }
}

Build

Docker build:

docker build -t mcp/aws-ow-s3-mcp-server .

Development

The server is built using:

• Node.js
• TypeScript
• @modelcontextprotocol/sdk
• @aws-sdk/client-s3
• @aws-sdk/s3-request-presigner

License

This MCP server is licensed under the MIT License. This means you are free to use, modify, and distribute the software, subject to the terms and conditions of the MIT License. For more details, please see the LICENSE file in the project repository.