reversegeojp-com

ReverseGeoJP provides a Japanese reverse geocoding API that converts latitude/longitude coordinates into the nearest address components such as prefecture, city, town, and postal code, and also offers forward geocoding from address strings to coordinates. The service uses official Japanese address data from the Ministry of Land, Infrastructure, Transport and Tourism combined with Japan Post postal code data, offering a free tier with up to 1,000 requests per month and paid plans for higher volume. It supports both Japanese and English interfaces and provides simple HTTP GET endpoints with API key authentication.

reversegeojp-com is listed with 2 APIs on the APIs.io network. Tagged areas include Company, Geocoding, Japan, API, and Location.

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

reversegeojp-com’s developer surface includes authentication, documentation, API reference, getting-started guide, support, pricing, signup flow, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

60.0/100 strong Agent 25/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

2 APIs

Company Geocoding JapanAPILocation

Kin Score

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

Composite quality — 60.0/100 · strong

Contract Quality 10.5 / 21

Developer Ergonomics 8.9 / 17

Access Clarity 12.4 / 17

Operational Transparency 3.7 / 11

Contract Governance 8.1 / 10

Discoverability 4.9 / 9

Regulatory Posture 5.1 / 15

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 0 / 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 0 / 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):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
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

9 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 49.5 — up to +12.6 composite points
Developer Ergonomics scores 52.4 — up to +9.5 composite points
Operational Transparency scores 33.7 — up to +8.6 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/reversegeojp-com/apis.yml: open an issue on github.com/api-evangelist/reversegeojp-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 →

APIs 2

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

ReverseGeoJP API

Provides reverse and forward geocoding for Japanese addresses.

reversegeojp-com API

reversegeojp-com API as documented publicly: 2 operations. Contract generated from the documentation by API Evangelist (2026-10-31); not the provider's own document.

Pricing Plans 1

Published pricing tiers and plan structures.

Reversegeojp Com Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Reversegeojp Com Rate Limits

3 limits

RATE LIMITS

Semantic Vocabularies 1

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

Reversegeojp Com Context

2 classes · 10 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

reversegeojp-com API Rules

12 rules · 10 errors 1 warnings 1 info

SPECTRAL

JSON Schema 2

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

GetGeocodeResponse

9 properties

JSON SCHEMA

GetReverseResponse

6 properties

JSON SCHEMA

Security Posture 2

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

Reversegeojp Com Authentication

2 schemes

SECURITY

Reversegeojp Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Reversegeojp Com Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

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 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

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: reversegeojp-com
name: reversegeojp-com
description: ReverseGeoJP provides a Japanese reverse geocoding API that converts latitude/longitude coordinates into the
  nearest address components such as prefecture, city, town, and postal code, and also offers forward geocoding from address
  strings to coordinates. The service uses official Japanese address data from the Ministry of Land, Infrastructure, Transport
  and Tourism combined with Japan Post postal code data, offering a free tier with up to 1,000 requests per month and paid
  plans for higher volume. It supports both Japanese and English interfaces and provides simple HTTP GET endpoints with API
  key authentication.
image: https://api.reversegeojp.com/favicon.svg
url: https://artifacts.apis.io/reversegeojp-com/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:
- Company
- Geocoding
- Japan
- API
- Location
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: RateLimits
  url: rate-limits/reversegeojp-com-rate-limits.yml
- type: Plans
  url: plans/reversegeojp-com-plans-pricing.yml
- type: Spectral
  url: rules/reversegeojp-com-rules.yml
- type: JSONLD
  url: json-ld/reversegeojp-com-context.jsonld
- type: Vocabulary
  url: vocabulary/reversegeojp-com-vocabulary.yml
- type: DataModel
  url: data-model/reversegeojp-com-data-model.yml
- type: Authentication
  url: authentication/reversegeojp-com-authentication.yml
- type: ErrorCatalog
  url: errors/reversegeojp-com-problem-types.yml
- type: Conformance
  url: conformance/reversegeojp-com-conformance.yml
- type: Hosts
  url: hosts/reversegeojp-com-hosts.yml
- type: Vendors
  url: vendors/reversegeojp-com-vendors.yml
- type: SDKs
  url: packages/reversegeojp-com-packages.yml
- type: Packages
  url: packages/reversegeojp-com-packages.yml
- type: DomainSecurity
  url: security/reversegeojp-com-domain-security.yml
- type: Website
  url: https://reversegeojp.com/
- type: Documentation
  url: https://api.reversegeojp.com/#docs
- type: APIReference
  url: https://api.reversegeojp.com/#docs
- type: GettingStarted
  url: https://api.reversegeojp.com/#docs
- type: Support
  url: https://api.reversegeojp.com/support
- type: TermsOfService
  url: https://api.reversegeojp.com/terms
- type: PrivacyPolicy
  url: https://api.reversegeojp.com/privacy
- type: Pricing
  url: https://api.reversegeojp.com/#plans
- type: SignUp
  url: https://api.reversegeojp.com/#start
- type: GitHubOrganization
  url: https://github.com/55tarkun/geojp-mcp
apis:
- name: ReverseGeoJP API
  humanURL: https://api.reversegeojp.com/
  baseURL: https://api.reversegeojp.com/
  description: Provides reverse and forward geocoding for Japanese addresses.
  aid: reversegeojp-com:reversegeojp-api
- aid: reversegeojp-com:reversegeojp-com-api
  name: reversegeojp-com API
  description: 'reversegeojp-com API as documented publicly: 2 operations. Contract generated from the documentation by API
    Evangelist (2026-10-31);

    not the provider''s own document.'
  humanURL: https://api.reversegeojp.com
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/reversegeojp-com-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/reversegeojp-com-get-geocode-response-schema.json
  - type: JSONSchema
    url: json-schema/reversegeojp-com-get-reverse-response-schema.json
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: No OpenAPI, AsyncAPI, GraphQL, or other machine-readable contract was found despite probing the API host.
  evidence:
  - url: https://api.reversegeojp.com/openapi.json
    status: 404
  - url: https://api.reversegeojp.com/openapi.yaml
    status: 404
  - url: https://api.reversegeojp.com/api-docs
    status: 404
  checked: '2026-10-31'
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 25
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

reversegeojp-com API — frequently asked questions

Does reversegeojp-com have an API?

Yes. APIs.io lists 2 APIs from reversegeojp-com, including ReverseGeoJP API and reversegeojp-com API.

Is there an OpenAPI specification for the reversegeojp-com API?

Yes. APIs.io indexes 1 OpenAPI specification for reversegeojp-com, each linked for download from this page.

How do I authenticate with the reversegeojp-com API?

reversegeojp-com uses bearer-token authentication (2 schemes). The details are profiled on APIs.io as Reversegeojp Com Authentication.

How much does the reversegeojp-com API cost?

APIs.io lists 4 pricing plans for reversegeojp-com, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the reversegeojp-com API ready for AI agents?

reversegeojp-com has a Kin Score of 60.0 out of 100 (strong) and an Agent Readiness score of 24.7 (agent-aware), scored by API Evangelist on 2026-10-31.

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