minio-mcp-server

minio-mcp-server

Enables LLM agents to interact with MinIO/S3 object storage, supporting bucket and object operations like listing, reading, writing, and generating presigned URLs.

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README

minio-mcp-server

An MCP server exposing MinIO/S3 object storage operations as tools for LLM agents.

Tools

  • list_buckets — list all buckets
  • list_objects(bucket, prefix, recursive) — list objects in a bucket
  • get_object(bucket, name) — read a text object's content
  • put_object(bucket, name, content) — write text content to an object
  • make_bucket(bucket) — create a bucket if it doesn't exist
  • remove_object(bucket, name) — delete an object
  • presigned_url(bucket, name, expires_seconds) — generate a presigned GET URL

Setup

  1. Create a virtual environment and install dependencies:

    python3 -m venv venv
source venv/bin/activate
pip install -r requirements.txt

  2. Copy .env.example to .env and fill in your MinIO credentials:

    cp .env.example .env
    Variable Description
    MINIO_ENDPOINT Host and port of your MinIO server, e.g. localhost:9000
    MINIO_ACCESS_KEY MinIO access key
    MINIO_SECRET_KEY MinIO secret key
    MINIO_SECURE true to use HTTPS, false for HTTP

  3. Run the server:

    python server.py

Security

.env is gitignored and must never be committed — it contains live credentials. Use dedicated, least-privilege MinIO credentials for this server rather than the root/admin account.

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