MCP S3 File Uploader
Provides secure file upload functionality to Amazon S3 with progress tracking, automatic UUID-based naming, and presigned URL generation for time-limited access to uploaded files
This server does not currently have a deployable release on Glama. Follow the repository's setup instructions to install and configure it for your MCP client, including any required credentials and local dependencies.
MCP S3 File Manager
S3 file operations for AI workflows - Upload, download, and manage files in Amazon S3 through Model Context Protocol (MCP).
Perfect for AI assistants like Claude, Cursor, and any MCP-compatible client.
⚡ Quick Start
# Install and run (requires AWS credentials)
uvx mcp-s3 --root ~/uploads
# Or install globally
pip install mcp-s3Related MCP server: Supabase Storage MCP
🔧 Setup
1. AWS Credentials
Create .env file in your project:
AWS_ACCESS_KEY_ID=your_access_key
AWS_SECRET_ACCESS_KEY=your_secret_key
AWS_DEFAULT_REGION=us-east-1
S3_BUCKET_NAME=your-bucket-name2. Add to Your AI Tool
Cursor IDE - Add to settings.json:
{
"mcp": {
"servers": {
"s3": {
"command": "uvx",
"args": ["mcp-s3", "--root", "~/uploads"],
"env": {
"AWS_ACCESS_KEY_ID": "your_key",
"AWS_SECRET_ACCESS_KEY": "your_secret",
"S3_BUCKET_NAME": "your-bucket"
}
}
}
}
}Claude Desktop - Add to config:
{
"mcpServers": {
"s3": {
"command": "mcp-s3",
"args": ["--root", "~/uploads"],
"env": {
"AWS_ACCESS_KEY_ID": "your_key",
"AWS_SECRET_ACCESS_KEY": "your_secret",
"S3_BUCKET_NAME": "your-bucket"
}
}
}
}🛠️ What You Can Do
Upload Files
@mcp Upload my config.json file to S3
@mcp Upload the backup.zip with 2-hour expiration
@mcp Upload report.pdf with force overwrite enabledPreserves original filenames (
config.json→config.json)Prevents accidental overwrites (fails if file exists)
Force overwrite option for intentional replacements
Progress tracking for large files
Download Files
@mcp Download config.json from S3 to ./downloads/
@mcp Download backup-2024.zip from S3List Files
@mcp List all files in S3
@mcp List files starting with "logs/"
@mcp Show me the first 50 files in the bucketGet File Info
@mcp Get info about config.json in S3
@mcp Show details for backup.zip🚀 For Software Engineers
Common Workflows
1. Backup & Share Code
# Upload project files
@mcp Upload my entire src/ directory to S3
@mcp Generate a 7-day URL for team-config.json2. CI/CD Integration
# In your deployment scripts
mcp-s3 --root ./build upload dist.tar.gz3. Log Management
# Upload application logs
@mcp Upload today's error.log to S3
@mcp List all log files from this month4. Asset Management
# Manage project assets
@mcp Upload design-assets.zip
@mcp Download latest-assets.zip to ./assets/Development Setup
git clone https://github.com/dayongd1/mcp-s3.git
cd mcp-s3
uv sync
uv run mcp-s3 --root ~/test-uploadsTesting
# Test basic functionality
python examples/test_mcp_server.py
# Test naming conflicts
python examples/test_naming_conflicts.py
# Test all features
python examples/test_download.py
python examples/test_list_files.py
python examples/test_get_file_info.py🔒 Security Notes
Path Safety: Prevents directory traversal attacks
Credential Management: Uses environment variables (never hardcode keys)
Presigned URLs: Time-limited access (default 24 hours)
Conflict Detection: Prevents accidental file overwrites
📦 Installation Options
# Run without installing (recommended)
uvx mcp-s3
# Install globally
pip install mcp-s3
# Development install
git clone && uv sync🚨 Troubleshooting
"Bucket not found"
# Check your bucket name and region
aws s3 ls s3://your-bucket-name"Access denied"
# Verify AWS credentials
python examples/test_aws_connection.py"File already exists"
# Use force overwrite or rename the file
@mcp Upload config.json with force overwrite enabled📚 Links
MCP Docs: https://modelcontextprotocol.io/
AWS S3 Setup: See
AWS_SETUP_GUIDE.md
Built with FastMCP | Python 3.10+ | MIT License
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
Loading tool schema changelog…
This server cannot be deployed
Maintenance
Related MCP Connectors
Browse, upload, download, and share files in your S3-compatible buckets with delegated roles.
Capture photos remotely from mobile devices via S3-backed upload URLs
Browse, upload, download, copy, move and share files in your own S3-compatible buckets.
Temporary file relay for AI agents: upload a generated file, get an expiring download link.
Related MCP Servers
- AlicenseNot gradedqualityDmaintenanceProvides secure access to AWS S3 buckets through pre-signed URLs, enabling listing, downloading, uploading, and deleting objects.2MIT
- AlicenseBqualityDmaintenanceEnables secure file and bucket management operations with Supabase Storage through enterprise-grade security features, batch uploads/downloads, and comprehensive file management capabilities. Supports both local file paths and base64 data with advanced transformations and auto-download functionality.10MIT
- AlicenseNot gradedqualityDmaintenanceEnables interaction with AWS S3 storage through bucket operations (create, delete, list), object management (upload, download, delete, list), and bucket policy configuration using AWS credentials.17 npm2MIT
- AlicenseNot gradedqualityDmaintenanceAn MCP server that enables users to upload local files to S3-compatible storage and retrieve shareable public URLs. Files are automatically organized into unique UUID-based folders to prevent naming conflicts while preserving original filenames.16 npmMIT