Cubbit

Cubbit is a European cloud storage provider offering DS3, a sovereign, geo-distributed, S3-compatible object storage platform. DS3 encrypts (AES-256), fragments, and replicates data across multiple user-selected locations using Reed-Solomon erasure coding, delivering geo-resilience and data sovereignty within Europe. It ships in two forms: DS3 Cloud, a ready-to-use managed geo-redundant object store (TBs to PBs), and DS3 Composer, self-hosted software-defined storage you run on your own hardware (200 TB+). The storage plane exposes an AWS S3-compatible API at https://s3.cubbit.eu (region eu-west-1), authenticated with access key / secret key and AWS Signature Version 4, so existing S3 SDKs, the AWS CLI, rclone, Cyberduck, Veeam and other S3 tooling work unchanged. Cubbit is certified to ISO/IEC 27001, 27017, 27018, 9001, 20000-1 and 22301, and is GDPR- and NIS2-aligned with Italian ACN PA Cloud qualification.

Cubbit publishes 1 API on the APIs.io network. Tagged areas include Object Storage, Cloud Storage, S3 Compatible, Storage, and Data Sovereignty.

Cubbit’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 21 more developer resources.

🌐 Visit website 📡 Source on GitHub

35.3/100 thin ▬ flat Agent 5/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

1 APIs

Object Storage Cloud Storage S3 Compatible Storage Data SovereigntyGeo-DistributedInfrastructure Company

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 35.3/100 · thin

Contract Quality 0.0 / 25

Developer Ergonomics 14.3 / 20

Access Clarity 9.5 / 20

Operational Transparency 1.7 / 13

Contract Governance 2.2 / 12

Discoverability 7.6 / 10

Agent readiness — 5/100 · agent aware

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 8 / 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 Surface 0 / 5

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/cubbit: 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 1

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

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

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 5

Pagination, idempotency, versioning, errors, and events

Lifecycle

Conventions

ErrorCatalog

DataModel

Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

CLI

CLI

Access & Security 6

Authentication, authorization, and security posture

DomainSecurity

Authentication

Compliance

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: cubbit
name: Cubbit
description: 'Cubbit is a European cloud storage provider offering DS3, a sovereign, geo-distributed, S3-compatible object
  storage platform. DS3 encrypts (AES-256), fragments, and replicates data across multiple user-selected locations using Reed-Solomon
  erasure coding, delivering geo-resilience and data sovereignty within Europe. It ships in two forms: DS3 Cloud, a ready-to-use
  managed geo-redundant object store (TBs to PBs), and DS3 Composer, self-hosted software-defined storage you run on your
  own hardware (200 TB+). The storage plane exposes an AWS S3-compatible API at https://s3.cubbit.eu (region eu-west-1), authenticated
  with access key / secret key and AWS Signature Version 4, so existing S3 SDKs, the AWS CLI, rclone, Cyberduck, Veeam and
  other S3 tooling work unchanged. Cubbit is certified to ISO/IEC 27001, 27017, 27018, 9001, 20000-1 and 22301, and is GDPR-
  and NIS2-aligned with Italian ACN PA Cloud qualification.'
url: https://raw.githubusercontent.com/api-evangelist/cubbit/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- techstars
x-tier: profiled
x-tier-reason: enrichment-pipeline
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
image: https://cdn.prod.website-files.com/67a4c547ac46cdf433fcc313/67c76518961dec2a8b897c21_og-homepage.webp
tags:
- Object Storage
- Cloud Storage
- S3 Compatible
- Storage
- Data Sovereignty
- Geo-Distributed
- Infrastructure
- Company
apis:
- name: Cubbit DS3 S3-Compatible API
  description: The AWS S3-compatible object storage API for Cubbit DS3. Supports bucket create/delete/list, object upload/download/copy/delete,
    multipart upload, object versioning, object lock (COMPLIANCE and GOVERNANCE retention plus legal hold), and object tagging.
    Authenticated with access key ID and secret access key using AWS Signature Version 4 against the s3.cubbit.eu endpoint
    (region eu-west-1); custom tenants use s3.<tenant>.cubbit.eu.
  humanURL: https://docs.cubbit.io/guides/s3-api
  baseURL: https://s3.cubbit.eu
  properties:
  - type: Documentation
    url: https://docs.cubbit.io/guides/s3-api
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/cubbit-domain-security.yml
- type: Website
  url: https://cubbit.io/
- type: DeveloperPortal
  url: https://docs.cubbit.io/
- type: Documentation
  url: https://docs.cubbit.io/
- type: APIReference
  url: https://docs.cubbit.io/guides/s3-api
- type: GettingStarted
  url: https://docs.cubbit.io/getting-started/quickstart
- type: Support
  url: https://www.cubbit.io/support
- type: Blog
  url: https://blog.cubbit.io/
- type: StatusPage
  url: https://status.cubbit.io/
- type: GitHubOrganization
  url: https://github.com/cubbit
- type: Pricing
  url: https://www.cubbit.io/pricing
- type: SignUp
  url: https://console.cubbit.eu/signin
- type: TermsOfService
  url: https://www.cubbit.io/legal/ds3-terms-of-service
- type: PrivacyPolicy
  url: https://www.cubbit.io/legal/privacy-policy
- type: Authentication
  url: authentication/cubbit-authentication.yml
- type: Lifecycle
  url: lifecycle/cubbit-lifecycle.yml
- type: Conventions
  url: conventions/cubbit-conventions.yml
- type: ErrorCatalog
  url: errors/cubbit-error-codes.yml
- type: Packages
  url: packages/cubbit-packages.yml
- type: CLI
  url: cli/cubbit-cli.yml
- type: Sandbox
  url: sandbox/cubbit-sandbox.yml
- type: DataModel
  url: data-model/cubbit-data-model.yml
- type: LLMsTxt
  url: llms/cubbit-llms.txt
- type: Conformance
  url: conformance/cubbit-conformance.yml
- type: Compliance
  url: https://www.cubbit.io/legal/certifications
- type: TrustCenter
  url: security/cubbit-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/cubbit-vulnerability-disclosure.yml
- type: Security
  url: https://www.cubbit.io/bug-bounty-program
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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