S3 MCP Server

Example Use Cases

• 1

  List and filter objects in an S3 bucket (e.g., by prefix) to discover available context files.

• 2

  Retrieve large S3 objects (PDFs, binaries) via streaming to avoid high memory usage and enable processing of large files.

• 3

  Integrate S3-hosted content into MCP-based pipelines, receiving object streams and metadata for downstream processing.

Description

This project provides a lightweight MCP-compatible server to list and retrieve objects from S3 buckets, supporting prefix filtering and streaming downloads to handle large files without loading them fully into memory. It includes a CLI, TypeScript source, and environment-variable based AWS credential configuration for secure operation. Designed for easy integration into mcp.json, it returns object streams and metadata (content type, length, lastModified) to downstream agents and services.