shirabe-dev

Shirabe is an API platform providing deterministic Japanese data via four REST APIs: calendar, address normalization, Japanese text processing, and corporate number verification. It guarantees consistent JSON schema responses, low cost per call, and includes attribution to public data sources. The service offers free tier usage without registration and targets AI agents needing reliable factual data.

shirabe-dev publishes 3 API contracts indexed on the APIs.io network: Calendar API, Hub API, and System API. Tagged areas include API Platform, Japanese Data, Deterministic, Free Tier, and AI Integration.

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

shirabe-dev’s developer surface includes API reference, authentication, documentation, pricing, and 20 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

54.9/100 strong Agent 44/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract

API PlatformJapanese DataDeterministicFree Tier AI Integration

Kin Score

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

Composite quality — 54.9/100 · strong

Contract Quality 13.8 / 21

Developer Ergonomics 6.1 / 17

Access Clarity 10.2 / 17

Operational Transparency 1.7 / 11

Contract Governance 8.1 / 10

Discoverability 5.6 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 44/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/shirabe-dev/"><img src="https://apis.io/badge/shirabe-dev/card.svg" alt="shirabe-dev on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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

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
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

6 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 35.7 — up to +12.9 composite points
Operational Transparency scores 15.8 — up to +10.9 composite points
Contract Quality scores 64.8 — up to +8.8 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/shirabe-dev/apis.yml: open an issue on github.com/api-evangelist/shirabe-dev 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 →

APIs 3

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

shirabe-dev Calendar API

暦情報の取得

shirabe-dev Hub API

複合正規化（住所・人名・法人番号・暦を 1 コールで横断）

shirabe-dev System API

システム情報

Pricing Plans 1

Published pricing tiers and plan structures.

Shirabe Dev Plans Pricing

3 plans

PLANS

Semantic Vocabularies 1

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

Shirabe Dev Context

21 classes · 48 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

shirabe-dev API Rules

19 rules · 15 errors 1 warnings 3 info

SPECTRAL

JSON Schema 6

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

BestDaysResponse

4 properties

JSON SCHEMA

CalendarRangeResponse

3 properties

JSON SCHEMA

CalendarResponse

10 properties

JSON SCHEMA

EnrichRequest

2 properties

JSON SCHEMA

EnrichResponse

2 properties

JSON SCHEMA

HealthResponse

3 properties

JSON SCHEMA

Security Posture 2

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

Shirabe Dev Authentication

apiKey · 1 scheme

SECURITY

Shirabe Dev Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Shirabe Dev Agentic Access

5 operations · 1 acting

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

Authentication

Authentication

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: shirabe-dev
name: shirabe-dev
image: https://shirabe.dev/og-default.svg
description: 'Shirabe is an API platform providing deterministic Japanese data via four REST APIs: calendar, address normalization,
  Japanese text processing, and corporate number verification. It guarantees consistent JSON schema responses, low cost per
  call, and includes attribution to public data sources. The service offers free tier usage without registration and targets
  AI agents needing reliable factual data.'
url: https://artifacts.apis.io/shirabe-dev/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-31 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-31'
modified: '2026-10-31'
tags:
- API Platform
- Japanese Data
- Deterministic
- Free Tier
- AI Integration
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/shirabe-dev-agentic-access.yml
- type: Plans
  url: plans/shirabe-dev-plans-pricing.yml
- type: Spectral
  url: rules/shirabe-dev-rules.yml
- type: JSONLD
  url: json-ld/shirabe-dev-context.jsonld
- type: Vocabulary
  url: vocabulary/shirabe-dev-vocabulary.yml
- type: DataModel
  url: data-model/shirabe-dev-data-model.yml
- type: ErrorCatalog
  url: errors/shirabe-dev-problem-types.yml
- type: Conformance
  url: conformance/shirabe-dev-conformance.yml
- type: LLMsTxt
  url: llms/shirabe-dev-llms.txt
- type: SecurityTxt
  url: well-known/shirabe-dev-chatgpt-security.txt
- type: WellKnown
  url: well-known/shirabe-dev-well-known.yml
- type: Hosts
  url: hosts/shirabe-dev-hosts.yml
- type: Vendors
  url: vendors/shirabe-dev-vendors.yml
- type: SDKs
  url: packages/shirabe-dev-packages.yml
- type: Packages
  url: packages/shirabe-dev-packages.yml
- type: GitHubOrganization
  url: https://github.com/techwell-inc-jp
- type: APIReference
  url: https://shirabe.dev/llms.txt
- type: Authentication
  url: authentication/shirabe-dev-authentication.yml
- type: DomainSecurity
  url: security/shirabe-dev-domain-security.yml
- type: Website
  url: https://shirabe.dev/
- type: Documentation
  url: https://shirabe.dev/calendar/docs
- type: Pricing
  url: https://shirabe.dev/pricing
- type: TermsOfService
  url: https://shirabe.dev/terms
- type: PrivacyPolicy
  url: https://shirabe.dev/privacy
apis:
- aid: shirabe-dev:shirabe-dev-calendar-api
  name: shirabe-dev Calendar API
  description: 暦情報の取得
  humanURL: https://shirabe.dev/calendar/docs
  baseURL: https://shirabe.dev
  tags:
  - Calendar
  properties:
  - type: OpenAPI
    url: openapi/shirabe-dev-calendar-api-openapi.yml
  - type: JSONSchema
    url: json-schema/shirabe-dev-calendar-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-enrich-request-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-enrich-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-best-days-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-calendar-range-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-health-response-schema.json
- aid: shirabe-dev:shirabe-dev-hub-api
  name: shirabe-dev Hub API
  description: 複合正規化（住所・人名・法人番号・暦を 1 コールで横断）
  humanURL: https://shirabe.dev/calendar/docs
  baseURL: https://shirabe.dev
  tags:
  - Hub
  properties:
  - type: OpenAPI
    url: openapi/shirabe-dev-hub-api-openapi.yml
  - type: JSONSchema
    url: json-schema/shirabe-dev-calendar-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-enrich-request-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-enrich-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-best-days-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-calendar-range-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-health-response-schema.json
- aid: shirabe-dev:shirabe-dev-system-api
  name: shirabe-dev System API
  description: システム情報
  humanURL: https://shirabe.dev/calendar/docs
  baseURL: https://shirabe.dev
  tags:
  - System
  properties:
  - type: OpenAPI
    url: openapi/shirabe-dev-system-api-openapi.yml
  - type: JSONSchema
    url: json-schema/shirabe-dev-calendar-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-enrich-request-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-enrich-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-best-days-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-calendar-range-response-schema.json
  - type: JSONSchema
    url: json-schema/shirabe-dev-health-response-schema.json
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 22
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

shirabe-dev API — frequently asked questions

Does shirabe-dev have an API?

Yes. APIs.io lists 3 APIs from shirabe-dev, including shirabe-dev Calendar API, shirabe-dev Hub API and shirabe-dev System API.

Is there an OpenAPI specification for the shirabe-dev API?

Yes. APIs.io indexes 3 OpenAPI specifications for shirabe-dev, each linked for download from this page.

How do I authenticate with the shirabe-dev API?

shirabe-dev uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Shirabe Dev Authentication.

How much does the shirabe-dev API cost?

APIs.io lists 3 pricing plans for shirabe-dev, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the shirabe-dev API ready for AI agents?

shirabe-dev has a Kin Score of 54.9 out of 100 (strong) and an Agent Readiness score of 44.1 (agent-ready), scored by API Evangelist on 2026-10-31.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
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.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/shirabe-dev"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/shirabe-dev/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/shirabe-dev/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.