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  4. MinIO S3 API
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MinIO S3 API

MinIO S3 API provides developers a free, self-hosted, S3-compatible object storage solution that can be deployed on various infrastructures, ensuring control and flexibility.

Developed by MinIO Inc.

Live API
99.90%Uptime
20msLatency
45kStars
API KeyAuth
NoCredit Card
RESTStyle
v1Version

Reference

API Endpoints

Endpoints

Available routes, request structures, and code examples.

Uploads files to S3-compatible storage

Endpoint URL
https://play.min.io/{bucket}/object
Code Example
curl -X PUT 'https://play.min.io/{bucket}/object' \
  -H 'Authorization: Bearer YOUR_API_KEY'
Request Payload
{
  "file": "binary_data",
  "content-type": "image/png"
}
Expected Response
{
  "etag": "abc123xyz456",
  "location": "/bucket-name/file.png",
  "versionId": "null"
}
Version:v1
Limit:100 uploads/minute

Integration

Quick Start

cURL ExampleREST
curl -X GET "https://play.min.io/minio/v1/buckets/my-bucket/objects/my-object"

Docs

Technical Documentation

What this API does

MinIO S3 API offers a fully S3-compatible, open-source object storage system designed for self-hosted environments. It enables developers to build scalable and secure cloud storage solutions on Docker, Kubernetes, or bare metal infrastructure. Key features include bucket versioning, encryption, metadata tagging, and high-performance object streaming, which help streamline data storage, retrieval, and management operations.

How it works

The API uses standard HTTP methods and supports popular S3 SDKs such as boto3, making integration familiar and straightforward for developers. MinIO allows for actions like storing, retrieving, and managing objects using standard S3 commands.

Authentication

MinIO requires authentication using access and secret keys. Developers must configure these keys for secure access to the API endpoints. This ensures that only authorized applications can perform storage operations.

Example usage

  • PUT /mybucket/myobject - Uploads an object.
  • GET /mybucket/myobject - Retrieves an object from the bucket.
  • DELETE /mybucket/myobject - Deletes an object from the bucket.
  • HEAD /mybucket/myobject - Retrieves metadata for an object.

Limits

Documentation does not specify rate limits, but operational limits may vary based on the deployment environment and underlying infrastructure.

Ideal use cases

  • Building applications requiring scalable cloud storage solutions.
  • Creating private data management systems without vendor lock-in.
  • Deploying microservices that utilize object storage.
  • Integrating storage solutions within CI/CD pipelines for artifact management.

Examples

Real-World Applications

  • Building private cloud storage solutions
  • Backup and archival services
  • Data lake implementation
  • Media content storage and streaming
  • IoT data storage and analytics

Evaluation

Advantages & Limitations

Advantages
  • ✓ Fully compatible with AWS S3 API
  • ✓ Open-source with no vendor lock-in
  • ✓ Supports multi-platform deployment
  • ✓ High performance with minimal latency
Limitations
  • ✗ Requires self-management and infrastructure
  • ✗ No native GraphQL support
  • ✗ Advanced security configurations may require expertise
  • ✗ Limited official support compared to cloud providers

Support

Frequently Asked Questions

Important Notice

Verify Before You Decide

Last verified · Apr 30, 2026

The details on this page — including pricing, features, and availability — are based on our last review and may not reflect the provider's current offering. Providers update their products frequently, sometimes without prior notice.

What may have changed

Pricing Plans
Features & Limits
Availability
Terms & Policies

Always visit the official provider website to confirm the latest pricing, terms, and feature availability before subscribing or integrating.

Check official site

External Resources

Documentation Official Website Pricing Details Postman Collection

API Specifications

v1
Pricing Model
Open source with optional enterprise support subscriptions
Credit Card
Not Required
Response Formats
JSON
Supported Languages
6 Languages
SDK Support
Python (boto3 compatible), Java, Go, JavaScript, Ruby, C#
Rate Limit

1000 requests per minute

Time to Hello World

Minutes to hours depending on deployment complexity

Free Tier

Completely free and open-source with unlimited usage subject to user-managed infrastructure

Best For

Developers and enterprises needing customizable, self-hosted S3-compatible object storage

Not Ideal For

Users seeking fully managed cloud storage without infrastructure management

Tags

#cloud#kubernetes#self-hosted#object-storage#s3#minio#storage#open-source

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