An Amazon S3 Model Context Protocol (MCP) server that provides tools for interacting with S3 buckets and objects.
S3 MCP Server is an MCP project maintained in the samuraikun/aws-s3-mcp repository. The maintainer describes its purpose as “An Amazon S3 Model Context Protocol (MCP) server that provides tools for interacting with S3 buckets and objects”. Read the project documentation for the complete scope.
The documented npm package is aws-s3-mcp. The configuration below comes from the maintainer’s example; adapt its paths and account values to your environment.
The example declares AWS_REGION, S3_BUCKETS, S3_MAX_BUCKETS, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY. Secret-looking values have been replaced with placeholders. Required and optional labels are shown only when the documentation states them.
Project documentation · Repository · Discovery listing. This profile records the public documentation checked on 2026-10-08.
Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| bucket | required): Name of the S3 bucket |
| prefix | optional): Prefix to filter objects (like a folder path) |
| maxKeys | optional): Maximum number of objects to return |
| key | required): Key (path) of the object to retrieve |
{
"mcpServers": {
"s3": {
"command": "npx",
"args": [
"aws-s3-mcp",
"--stdio"
],
"env": {
"AWS_REGION": "us-east-1",
"S3_BUCKETS": "bucket1,bucket2,bucket3",
"S3_MAX_BUCKETS": "5",
"AWS_ACCESS_KEY_ID": "YOUR_AWS_ACCESS_KEY_ID",
"AWS_SECRET_ACCESS_KEY": "YOUR_AWS_SECRET_ACCESS_KEY"
}
}
}
}From the project documentation. Replace placeholders and example paths before connecting.
| Variable | Description | Required |
|---|---|---|
| AWS_REGION | Declared in the maintainer’s client configuration. | Check documentation |
| S3_BUCKETS | Declared in the maintainer’s client configuration. | Check documentation |
| S3_MAX_BUCKETS | Declared in the maintainer’s client configuration. | Check documentation |
| AWS_ACCESS_KEY_ID | Declared in the maintainer’s client configuration. | Check documentation |
| AWS_SECRET_ACCESS_KEY | Declared in the maintainer’s client configuration. | Check documentation |
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