MinIO

MinIO is a high-performance, S3-compatible object storage system built for large-scale AI, analytics, and cloud-native data infrastructure. Its API is a drop-in implementation of the Amazon S3 REST API (bucket and object operations, multipart uploads, versioning, object locking / WORM retention, lifecycle policies, replication, and encryption), authenticated with AWS Signature Version 4 using access-key/secret-key pairs. Alongside the S3 data API, MinIO ships an Admin API (madmin) for cluster, user, policy, and service management. It is distributed as open-source software and as the commercial AIStor product, deployed on Kubernetes via an operator and Helm charts, and driven through first-party SDKs for Go, Python, Java, JavaScript, .NET, C++, and Rust plus the `mc` command-line client.

MinIO publishes 2 APIs on the APIs.io network. Tagged areas include Object Storage, Storage, S3 Compatible, Cloud Native, and Kubernetes.

The MinIO catalog on APIs.io includes 1 event-driven AsyncAPI specification.

MinIO’s developer surface includes documentation, API reference, getting-started guide, engineering blog, pricing, support, signup flow, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub
48.2/100 developing ▬ flat Agent 39/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
2 APIs 1 MCP Servers
Object StorageStorageS3 CompatibleCloud NativeKubernetesData InfrastructureAI StorageCompany

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 48.2/100 · developing
Contract Quality 5.7 / 25
Developer Ergonomics 16.1 / 20
Commercial Clarity 12.1 / 20
Operational Transparency 5.1 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 39/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/minio: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

MinIO S3-Compatible API

S3-compatible object storage REST API implementing Amazon S3 bucket and object operations (put/get/list/delete objects, multipart uploads, versioning, object locking, lifecycle,...

MinIO Admin API

Administrative API (madmin) for managing MinIO/AIStor clusters: users, groups, canned and IAM policies, service accounts, healing, cluster info, configuration, and service restart.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

minio-mcp.yml

MCP SERVER

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Minio Bucket Notifications Webhooks

ASYNCAPI

Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Minio Authentication

signature-v4/sts/ldap/oidc · 4 schemes

SECURITY

Minio Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Minio Vulnerability Disclosure

contact published

SECURITY

Minio Trust Center

ISO 27001

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp
 Sandbox
Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 WellKnown
WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 Conformance
Conformance
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Webhooks
Webhooks

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
CLI

Access & Security 7

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 Authentication
Authentication
 DomainSecurity
DomainSecurity
 VulnerabilityDisclosure
VulnerabilityDisclosure
 Security
Security
 TrustCenter
TrustCenter
 Compliance
Compliance

Scroll for all 7

Operate 2

Status, limits, changes, and where to get help

Support
Support
 ChangeLog
ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 1

The organization behind the API

Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: minio
name: MinIO
description: MinIO is a high-performance, S3-compatible object storage system built for large-scale AI, analytics, and cloud-native
  data infrastructure. Its API is a drop-in implementation of the Amazon S3 REST API (bucket and object operations, multipart
  uploads, versioning, object locking / WORM retention, lifecycle policies, replication, and encryption), authenticated with
  AWS Signature Version 4 using access-key/secret-key pairs. Alongside the S3 data API, MinIO ships an Admin API (madmin)
  for cluster, user, policy, and service management. It is distributed as open-source software and as the commercial AIStor
  product, deployed on Kubernetes via an operator and Helm charts, and driven through first-party SDKs for Go, Python, Java,
  JavaScript, .NET, C++, and Rust plus the `mc` command-line client.
url: https://raw.githubusercontent.com/api-evangelist/minio/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://github.com/minio.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- general-catalyst
- softbank-vision-fund
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Object Storage
- Storage
- S3 Compatible
- Cloud Native
- Kubernetes
- Data Infrastructure
- AI Storage
- Company
apis:
- name: MinIO S3-Compatible API
  description: S3-compatible object storage REST API implementing Amazon S3 bucket and object operations (put/get/list/delete
    objects, multipart uploads, versioning, object locking, lifecycle, replication), authenticated with AWS Signature Version
    4.
  humanURL: https://min.io/product/s3-compatibility
  baseURL: https://play.min.io
  tags:
  - Object Storage
  - S3 Compatible
  properties:
  - type: Documentation
    url: https://min.io/docs
- name: MinIO Admin API
  description: 'Administrative API (madmin) for managing MinIO/AIStor clusters: users, groups, canned and IAM policies, service
    accounts, healing, cluster info, configuration, and service restart.'
  humanURL: https://github.com/minio/madmin-go
  baseURL: https://play.min.io
  tags:
  - Administration
  - Object Storage
common:
- type: TrustCenter
  url: security/minio-trust-center.yml
- type: DeveloperPortal
  url: https://min.io/docs
- type: Documentation
  url: https://min.io/docs
- type: APIReference
  url: https://min.io/product/s3-compatibility
- type: GettingStarted
  url: https://min.io/docs/minio/linux/index.html
- type: GitHubOrganization
  url: https://github.com/minio
- type: Blog
  url: https://blog.min.io
- type: Pricing
  url: https://min.io/pricing
- type: Support
  url: https://subnet.min.io
- type: SignUp
  url: https://subnet.min.io/login
- type: Packages
  url: packages/minio-packages.yml
- type: SDKs
  url: packages/minio-packages.yml
- type: CLI
  url: cli/minio-cli.yml
- type: MCPServer
  url: mcp/minio-mcp.yml
- type: LLMsTxt
  url: llms/minio-llms.txt
- type: WellKnown
  url: well-known/minio-well-known.yml
- type: Authentication
  url: authentication/minio-authentication.yml
- type: Conventions
  url: conventions/minio-conventions.yml
- type: Conformance
  url: conformance/minio-conformance.yml
- type: ErrorCatalog
  url: errors/minio-error-codes.yml
- type: Lifecycle
  url: lifecycle/minio-lifecycle.yml
- type: ChangeLog
  url: changelog/minio-changelog.yml
- type: Sandbox
  url: sandbox/minio-sandbox.yml
- type: DomainSecurity
  url: security/minio-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/minio-vulnerability-disclosure.yml
- type: Security
  url: security/minio-vulnerability-disclosure.yml
- type: TrustCenter
  url: security/minio-trust-center.yml
- type: Compliance
  url: https://trust.min.io/
- type: Webhooks
  url: asyncapi/minio-bucket-notifications-webhooks.yml
- type: TermsOfService
  url: https://www.min.io/legal/aistor-free-agreement
- type: PrivacyPolicy
  url: https://www.min.io/legal/privacy-policy
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 15
  pass: local-v1