Cubox

Cubox provides an AI‑enhanced reading assistant that helps users collect, annotate, and organize web articles and documents across devices. The platform offers features such as automatic content extraction, AI‑generated summaries, tagging, and a personal knowledge vault that syncs between iOS, Android, macOS, Windows, and browser extensions. Users can subscribe to free or paid plans for increased storage, AI credits, and advanced collaboration tools, while the service emphasizes data ownership and privacy.

Cubox is profiled on the APIs.io network. Tagged areas include Company, AI, Reading, Knowledge-Management, and Productivity.

Cubox’s developer surface includes pricing, documentation, and 7 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

15.7/100 emerging Agent 3/100 human only Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

0 APIs

CompanyAIReadingKnowledge-ManagementProductivity Cross-Platform

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 15.7/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.8 / 17

Access Clarity 7.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 0.8 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

12 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 16.7 — up to +16.7 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/cubox/apis.yml: open an issue on github.com/api-evangelist/cubox to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Pricing Plans 1

Published pricing tiers and plan structures.

Cubox Plans Pricing

2 plans

PLANS

Security Posture 1

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

Cubox Domain Security

TLSv1.2

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Build 2

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

Pricing

Pricing

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: cubox
name: Cubox
image: https://image.cubox.pro/webogimage.jpg
description: Cubox provides an AI‑enhanced reading assistant that helps users collect, annotate, and organize web articles
  and documents across devices. The platform offers features such as automatic content extraction, AI‑generated summaries,
  tagging, and a personal knowledge vault that syncs between iOS, Android, macOS, Windows, and browser extensions. Users can
  subscribe to free or paid plans for increased storage, AI credits, and advanced collaboration tools, while the service emphasizes
  data ownership and privacy.
url: https://artifacts.apis.io/cubox/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-28 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-28'
modified: '2026-10-28'
tags:
- Company
- AI
- Reading
- Knowledge-Management
- Productivity
- Cross-Platform
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/cubox-plans-pricing.yml
- type: Hosts
  url: hosts/cubox-hosts.yml
- type: SDKs
  url: packages/cubox-packages.yml
- type: Packages
  url: packages/cubox-packages.yml
- type: Pricing
  url: https://cubox.pro/pricing
- type: Login
  url: https://cubox.pro/web/signin
- type: Documentation
  url: https://help.cubox.pro/
- type: DomainSecurity
  url: security/cubox-domain-security.yml
- type: Website
  url: https://cubox.pro/
apis: []
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: The provider's documentation pages contain no machine‑readable OpenAPI, AsyncAPI, GraphQL, gRPC or WSDL contracts.
  evidence:
  - url: https://help.cubox.pro/save/89d3/
    status: 200
  checked: '2026-10-28'
x-submission-probe: 200, 2026-10-26
x-enrichment:
  date: '2026-10-28'
  status: enriched
  artifacts_added: 9
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Cubox API — frequently asked questions

How much does the Cubox API cost?

APIs.io lists 2 pricing plans for Cubox, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the Cubox API ready for AI agents?

Cubox has a Kin Score of 15.7 out of 100 (emerging) and an Agent Readiness score of 3.1 (human-only), scored by API Evangelist on 2026-10-31.

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