OpenIO

OpenIO SDS is an open-source, software-defined object storage platform for building hyper-scalable, high-performance storage infrastructures. It stores data across commodity hardware and exposes it through an Amazon S3-compatible gateway and an OpenStack Swift-compatible gateway, backed by native RAWX, Conscience, Directory, Container, Content and Account services. Developers integrate via first-party Python, C and Java client libraries and the `openio` command-line interface, or with any standard AWS S3 / Swift SDK and CLI. The S3 gateway supports Signature v2/v4, versioning, lifecycle, CORS, tagging, ACLs and multipart uploads, plus a documented subset of AWS IAM (paid plans). OpenIO was founded as a French storage company backed by Partech and acquired by OVHcloud in 2020; the SDS project remains publicly documented open source.

OpenIO publishes 1 API on the APIs.io network. Tagged areas include Company, Infrastructure Saas, Object Storage, S3, and Cloud Storage.

OpenIO’s developer surface includes documentation, API reference, getting-started guide, authentication, CLI, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub
17.2/100 emerging ▬ flat Agent 3/100 human only library Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0
1 API
CompanyInfrastructure SaasObject StorageS3Cloud StorageOpen SourceOpenStack SwiftStorage

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0
Composite quality — 17.2/100 · emerging
Contract Quality 0.0 / 21
Developer Ergonomics 6.9 / 17
Access Clarity 0.0 / 17
Operational Transparency 0.3 / 11
Contract Governance 1.9 / 10
Discoverability 5.5 / 9
Regulatory Posture 2.5 / 15
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/openio: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Interfaces this provider implements that became standards by being copied rather than ratified. Each is profiled by the API Commons, and the evidence column says how the claim was established — not that it was made.

The S3 Interface
prose — states compatibility; nothing published to check it against
8 core of 116 operations graded · api-commons/storage

APIs 1

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

OpenIO SDS S3-Compatible Object Storage API

Amazon S3-compatible object storage gateway exposed by OpenIO SDS, with an OpenStack Swift-compatible gateway alongside. Self-hosted software, so the API base URL is deployment-...

Security Posture 2

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

Openio Authentication

awsSignature/swiftAuth · 2 schemes

SECURITY

Openio Domain Security

no transport/DNS hardening detected

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 Lifecycle
Lifecycle
 Conventions
Conventions

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 CLI
CLI
 Packages
Packages
 SDKs
SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Company 1

The organization behind the API

Website
Website

Other 1

Properties that don't map to a standard resource type

ParentCompany
ParentCompany

Source (apis.yml)

apis.yml Raw ↑ 
aid: openio
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/openio.png
name: OpenIO
description: OpenIO SDS is an open-source, software-defined object storage platform for building hyper-scalable, high-performance
  storage infrastructures. It stores data across commodity hardware and exposes it through an Amazon S3-compatible gateway
  and an OpenStack Swift-compatible gateway, backed by native RAWX, Conscience, Directory, Container, Content and Account
  services. Developers integrate via first-party Python, C and Java client libraries and the `openio` command-line interface,
  or with any standard AWS S3 / Swift SDK and CLI. The S3 gateway supports Signature v2/v4, versioning, lifecycle, CORS, tagging,
  ACLs and multipart uploads, plus a documented subset of AWS IAM (paid plans). OpenIO was founded as a French storage company
  backed by Partech and acquired by OVHcloud in 2020; the SDS project remains publicly documented open source.
url: https://raw.githubusercontent.com/api-evangelist/openio/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- partech
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Infrastructure Saas
- Object Storage
- S3
- Cloud Storage
- Open Source
- OpenStack Swift
- Storage
tags_raw:
- Company
- Infrastructure Saas
- Object Storage
- S3
- Cloud Storage
- Open Source
- OpenStack Swift
- Storage
- Open-Source
apis:
- name: OpenIO SDS S3-Compatible Object Storage API
  description: Amazon S3-compatible object storage gateway exposed by OpenIO SDS, with an OpenStack Swift-compatible gateway
    alongside. Self-hosted software, so the API base URL is deployment-specific.
  humanURL: https://docs.openio.io/latest/source/arch-design/s3_compliancy.html
  tags:
  - Object Storage
  - S3
  - Swift
  properties:
  - type: Documentation
    url: https://docs.openio.io/latest/
  - type: APIReference
    url: https://docs.openio.io/latest/source/arch-design/s3_compliancy.html
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: ParentCompany
  url: https://apis.io/providers/ovh-cloud/
  name: OVHcloud
  x-relationship: acquired
  x-evidence: OpenIO was founded as a French storage company backed by Partech and acquired by OVHcloud in 2020; the SDS project
    remains publicly documented open source.
- type: Website
  url: https://www.openio.io/
- type: Documentation
  url: https://docs.openio.io/latest/
- type: APIReference
  url: https://docs.openio.io/latest/source/arch-design/s3_compliancy.html
- type: GettingStarted
  url: https://docs.openio.io/latest/
- type: GitHubOrganization
  url: https://github.com/open-io
- type: Authentication
  url: authentication/openio-authentication.yml
- type: Conformance
  url: conformance/openio-conformance.yml
- type: CLI
  url: cli/openio-cli.yml
- type: Packages
  url: packages/openio-packages.yml
- type: SDKs
  url: packages/openio-packages.yml
- type: Lifecycle
  url: lifecycle/openio-lifecycle.yml
- type: Conventions
  url: conventions/openio-conventions.yml
- type: LLMsTxt
  url: llms/openio-llms.txt
- type: DomainSecurity
  url: security/openio-domain-security.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 9
  pass: local-v1

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