Caliu

Caliu is a local‑first Markdown notes app for Mac, iPhone, iPad, Android and the web. It works offline with no account needed, keeping data private by design. Users can organize notes with hashtags, sync across devices, and access a full REST API for integration. The service emphasizes privacy, local storage first, and optional cloud sync, catering to individuals and teams seeking secure, flexible note‑taking.

Caliu publishes 9 API contracts indexed on the APIs.io network, including API Keys API, Attachments API, Auth API, and 6 more. Tagged areas include Note Taking, Privacy, Local-First, Markdown, and Cross-Platform.

The Caliu catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Caliu’s developer surface includes support, changelog, authentication, documentation, getting-started guide, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

35.7/100 thin Agent 38/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessOpen

1 published contract

Note Taking Privacy Local-First Markdown Cross-Platform

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 35.7/100 · thin

Contract Quality 13.6 / 21

Developer Ergonomics 4.3 / 17

Access Clarity 1.8 / 17

Operational Transparency 2.0 / 11

Contract Governance 2.2 / 10

Discoverability 5.7 / 9

Regulatory Posture 3.1 / 15

Agent readiness — 38/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

5 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 10.5 — up to +17.9 composite points
Developer Ergonomics scores 25.0 — up to +15.0 composite points
Operational Transparency scores 18.4 — up to +10.6 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/caliuapp-com/apis.yml: open an issue on github.com/api-evangelist/caliuapp-com 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 →

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 9

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

Caliu API Keys API

The API Keys API from Caliu — 2 operation(s) for api keys.

Caliu Attachments API

The Attachments API from Caliu — 7 operation(s) for attachments.

Caliu Auth API

The Auth API from Caliu — 1 operation(s) for auth.

Caliu Devices API

The Devices API from Caliu — 2 operation(s) for devices.

Caliu Export API

The Export API from Caliu — 2 operation(s) for export.

Caliu Notes API

The Notes API from Caliu — 15 operation(s) for notes.

Caliu Reminders API

The Reminders API from Caliu — 3 operation(s) for reminders.

Caliu Subscription API

The Subscription API from Caliu — 2 operation(s) for subscription.

Caliu Tags API

The Tags API from Caliu — 2 operation(s) for tags.

Scroll for all 9

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Caliuapp Com Context

10 classes · 48 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Caliu API Rules

55 rules · 45 errors 6 warnings 4 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

ApiKey

6 properties

JSON SCHEMA

Note

17 properties

JSON SCHEMA

Reminder

9 properties

JSON SCHEMA

Tag

9 properties

JSON SCHEMA

UploadLink

7 properties

JSON SCHEMA

User

8 properties

JSON SCHEMA

Security Posture 2

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

Caliuapp Com Authentication

apiKey/http · 2 schemes

SECURITY

Caliuapp Com Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Caliuapp Com Agentic Access

47 operations · 29 acting · 2 human-in-the-loop

47 operations · 29 acting

AGENTIC

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

OpenAPI

OpenAPI

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

WellKnown

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 5

Status, limits, changes, and where to get help

Support

ChangeLog

StatusPage

Roadmap

ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Newsroom

Newsroom

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: caliuapp-com
name: Caliu
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://caliuapp.com/opengraph-image
description: Caliu is a local‑first Markdown notes app for Mac, iPhone, iPad, Android and the web. It works offline with no
  account needed, keeping data private by design. Users can organize notes with hashtags, sync across devices, and access
  a full REST API for integration. The service emphasizes privacy, local storage first, and optional cloud sync, catering
  to individuals and teams seeking secure, flexible note‑taking.
url: https://artifacts.apis.io/caliuapp-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-03 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-03'
modified: '2026-11-03'
tags:
- Note Taking
- Privacy
- Local-First
- Markdown
- Cross-Platform
tags_raw:
- Note-taking
- Privacy
- Local-first
- Markdown
- Cross-platform
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Support
  url: https://caliuapp.com/help
- type: AgenticAccess
  url: agentic-access/caliuapp-com-agentic-access.yml
- type: Spectral
  url: rules/caliuapp-com-rules.yml
- type: JSONLD
  url: json-ld/caliuapp-com-context.jsonld
- type: Vocabulary
  url: vocabulary/caliuapp-com-vocabulary.yml
- type: DataModel
  url: data-model/caliuapp-com-data-model.yml
- type: ChangeLog
  url: changelog/caliuapp-com-changelog.yml
- type: ErrorCatalog
  url: errors/caliuapp-com-problem-types.yml
- type: Conformance
  url: conformance/caliuapp-com-conformance.yml
- type: WellKnown
  url: well-known/caliuapp-com-well-known.yml
- type: Hosts
  url: hosts/caliuapp-com-hosts.yml
- type: Vendors
  url: vendors/caliuapp-com-vendors.yml
- type: TermsOfService
  url: https://caliuapp.com/terms
- type: StatusPage
  url: https://status.caliuapp.com/status/caliu
- type: Roadmap
  url: https://caliuapp.com/roadmap
- type: PrivacyPolicy
  url: https://caliuapp.com/privacy
- type: Newsroom
  url: https://caliuapp.com/media
- type: ChangeLog
  url: https://caliuapp.com/changelog
- type: Authentication
  url: authentication/caliuapp-com-authentication.yml
- type: DomainSecurity
  url: security/caliuapp-com-domain-security.yml
- type: Website
  url: https://caliuapp.com/
- type: Documentation
  url: https://caliuapp.com/docs
- type: OpenAPI
  url: openapi/caliuapp-com-openapi.json
  source: https://api.caliuapp.com/openapi.json
- type: GettingStarted
  url: https://caliuapp.com/docs#getting-started
apis:
- aid: caliuapp-com:caliuapp-com-api-keys-api
  name: Caliu API Keys API
  description: The API Keys API from Caliu — 2 operation(s) for api keys.
  humanURL: https://caliuapp.com/docs
  baseURL: https://api.caliuapp.com
  tags:
  - APIKeys
  tags_raw:
  - API Keys
  properties:
  - type: OpenAPI
    url: openapi/caliuapp-com-api-keys-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caliuapp-com-note-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-tag-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-upload-link-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-user-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-reminder-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-api-key-schema.json
- aid: caliuapp-com:caliuapp-com-attachments-api
  name: Caliu Attachments API
  description: The Attachments API from Caliu — 7 operation(s) for attachments.
  humanURL: https://caliuapp.com/docs
  baseURL: https://api.caliuapp.com
  tags:
  - Attachments
  properties:
  - type: OpenAPI
    url: openapi/caliuapp-com-attachments-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caliuapp-com-note-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-tag-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-upload-link-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-user-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-reminder-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-api-key-schema.json
- aid: caliuapp-com:caliuapp-com-auth-api
  name: Caliu Auth API
  description: The Auth API from Caliu — 1 operation(s) for auth.
  humanURL: https://caliuapp.com/docs
  baseURL: https://api.caliuapp.com
  tags:
  - Authentication
  tags_raw:
  - Auth
  properties:
  - type: OpenAPI
    url: openapi/caliuapp-com-auth-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caliuapp-com-note-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-tag-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-upload-link-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-user-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-reminder-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-api-key-schema.json
- aid: caliuapp-com:caliuapp-com-devices-api
  name: Caliu Devices API
  description: The Devices API from Caliu — 2 operation(s) for devices.
  humanURL: https://caliuapp.com/docs
  baseURL: https://api.caliuapp.com
  tags:
  - Devices
  properties:
  - type: OpenAPI
    url: openapi/caliuapp-com-devices-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caliuapp-com-note-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-tag-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-upload-link-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-user-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-reminder-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-api-key-schema.json
- aid: caliuapp-com:caliuapp-com-export-api
  name: Caliu Export API
  description: The Export API from Caliu — 2 operation(s) for export.
  humanURL: https://caliuapp.com/docs
  baseURL: https://api.caliuapp.com
  tags:
  - Export
  properties:
  - type: OpenAPI
    url: openapi/caliuapp-com-export-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caliuapp-com-note-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-tag-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-upload-link-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-user-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-reminder-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-api-key-schema.json
- aid: caliuapp-com:caliuapp-com-notes-api
  name: Caliu Notes API
  description: The Notes API from Caliu — 15 operation(s) for notes.
  humanURL: https://caliuapp.com/docs
  baseURL: https://api.caliuapp.com
  tags:
  - Notes
  properties:
  - type: OpenAPI
    url: openapi/caliuapp-com-notes-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caliuapp-com-note-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-tag-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-upload-link-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-user-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-reminder-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-api-key-schema.json
- aid: caliuapp-com:caliuapp-com-reminders-api
  name: Caliu Reminders API
  description: The Reminders API from Caliu — 3 operation(s) for reminders.
  humanURL: https://caliuapp.com/docs
  baseURL: https://api.caliuapp.com
  tags:
  - Reminders
  properties:
  - type: OpenAPI
    url: openapi/caliuapp-com-reminders-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caliuapp-com-note-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-tag-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-upload-link-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-user-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-reminder-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-api-key-schema.json
- aid: caliuapp-com:caliuapp-com-subscription-api
  name: Caliu Subscription API
  description: The Subscription API from Caliu — 2 operation(s) for subscription.
  humanURL: https://caliuapp.com/docs
  baseURL: https://api.caliuapp.com
  tags:
  - Subscription
  properties:
  - type: OpenAPI
    url: openapi/caliuapp-com-subscription-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caliuapp-com-note-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-tag-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-upload-link-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-user-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-reminder-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-api-key-schema.json
- aid: caliuapp-com:caliuapp-com-tags-api
  name: Caliu Tags API
  description: The Tags API from Caliu — 2 operation(s) for tags.
  humanURL: https://caliuapp.com/docs
  baseURL: https://api.caliuapp.com
  tags:
  - Tags
  properties:
  - type: OpenAPI
    url: openapi/caliuapp-com-tags-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caliuapp-com-note-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-tag-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-upload-link-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-user-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-reminder-schema.json
  - type: JSONSchema
    url: json-schema/caliuapp-com-api-key-schema.json
x-enrichment:
  date: '2026-11-03'
  status: enriched
  artifacts_added: 21
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Caliu API — frequently asked questions

Does Caliu have an API?

Yes. APIs.io lists 9 APIs from Caliu, including Caliu API Keys API, Caliu Attachments API and Caliu Auth API, and 6 more.

Is there an OpenAPI specification for the Caliu API?

Yes. APIs.io indexes 9 OpenAPI specifications for Caliu, each linked for download from this page.

How do I authenticate with the Caliu API?

Caliu documents its authentication (apiKey/http · 2 schemes). The details are profiled on APIs.io as Caliuapp Com Authentication.

Is the Caliu API ready for AI agents?

Caliu has a Kin Score of 35.7 out of 100 (thin) and an Agent Readiness score of 38.4 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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