plugrail-dev

Plugrail provides a suite of Model Context Protocol (MCP) servers that connect Japanese public data sources—such as holiday calendars, corporate registration, nutrition information, and product recall data—to AI agents. By exposing this data via streamable HTTP endpoints, developers can query authoritative information without needing to manage raw datasets. The service offers free anonymous access with rate‑limited usage and paid plans for higher volume, and it includes clear source citations and disclaimer notices. Plugrail aims to simplify integration of public sector data into AI‑driven workflows.

plugrail-dev is listed with 1 API on the APIs.io network. Tagged areas include Company, MCP, Public-Data, Japan, and AI-Integration.

plugrail-dev’s developer surface includes documentation, pricing, and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

23.9/100 emerging Agent 6/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API 1 MCP Servers

Company MCPPublic-DataJapanAI-Integration

Kin Score

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

Composite quality — 23.9/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 8.9 / 17

Operational Transparency 2.9 / 11

Contract Governance 0.0 / 10

Discoverability 5.5 / 9

Regulatory Posture 3.5 / 15

Agent readiness — 6/100 · agent aware

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 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 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector 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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

10 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 9.5 — up to +18.1 composite points
Contract Governance scores 0.0 — up to +12.0 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/plugrail-dev/apis.yml: open an issue on github.com/api-evangelist/plugrail-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 1

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

Plugrail MCP

MCP endpoint providing access to Japanese public data sources such as holiday calendars, corporate registration, nutrition information, and product recall data.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

plugrail-dev MCP Server

Remote MCP server at jp-calendar.plugrail.dev.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Plugrail Dev Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Plugrail Dev Rate Limits

1 limits

RATE LIMITS

Security Posture 2

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

Plugrail Dev Authentication

0 schemes

SECURITY

Plugrail Dev Domain Security

TLSv1.3

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Plugrail Dev Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

ErrorCatalog

ErrorCatalog

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

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: plugrail-dev
name: plugrail-dev
description: Plugrail provides a suite of Model Context Protocol (MCP) servers that connect Japanese public data sources—such
  as holiday calendars, corporate registration, nutrition information, and product recall data—to AI agents. By exposing this
  data via streamable HTTP endpoints, developers can query authoritative information without needing to manage raw datasets.
  The service offers free anonymous access with rate‑limited usage and paid plans for higher volume, and it includes clear
  source citations and disclaimer notices. Plugrail aims to simplify integration of public sector data into AI‑driven workflows.
image: https://plugrail.dev/og.svg
url: https://artifacts.apis.io/plugrail-dev/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-29 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-29'
modified: '2026-10-29'
tags:
- Company
- MCP
- Public-Data
- Japan
- AI-Integration
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: RateLimits
  url: rate-limits/plugrail-dev-rate-limits.yml
- type: Plans
  url: plans/plugrail-dev-plans-pricing.yml
- type: ErrorCatalog
  url: errors/plugrail-dev-problem-types.yml
- type: MCPServer
  url: mcp/plugrail-dev-mcp.yml
- type: Hosts
  url: hosts/plugrail-dev-hosts.yml
- type: Vendors
  url: vendors/plugrail-dev-vendors.yml
- type: DomainSecurity
  url: security/plugrail-dev-domain-security.yml
- type: Website
  url: https://plugrail.dev/
- type: Documentation
  url: https://plugrail.dev/en/
- type: Pricing
  url: https://plugrail.dev/pricing/
- type: TermsOfService
  url: https://plugrail.dev/legal/terms/
- type: PrivacyPolicy
  url: https://plugrail.dev/legal/privacy/
- type: GitHubOrganization
  url: https://github.com/plugrail
apis:
- name: Plugrail MCP
  description: MCP endpoint providing access to Japanese public data sources such as holiday calendars, corporate registration,
    nutrition information, and product recall data.
  humanURL: https://plugrail.dev/
  baseURL: https://jp-calendar.plugrail.dev
  aid: plugrail-dev:plugrail-mcp
x-coverage:
  state: gated
  reason: partner-login
  detail: MCP endpoint https://jp-calendar.plugrail.dev/mcp requires authentication, returning 405/406, preventing contract
    retrieval.
  evidence:
  - url: https://jp-calendar.plugrail.dev/mcp
    status: 405
  checked: '2026-10-29'
x-enrichment:
  date: '2026-10-29'
  status: enriched
  artifacts_added: 19
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

plugrail-dev API — frequently asked questions

Does plugrail-dev have an API?

Yes. APIs.io lists 1 API from plugrail-dev, including Plugrail MCP.

How do I authenticate with the plugrail-dev API?

plugrail-dev documents its authentication (0 schemes). The details are profiled on APIs.io as Plugrail Dev Authentication.

How much does the plugrail-dev API cost?

APIs.io lists 1 pricing plan for plugrail-dev, with each plan's price, limits and inclusions under Pricing Plans on this page.

Does plugrail-dev have an MCP server?

Yes. APIs.io lists 1 MCP server for plugrail-dev: Remote MCP server at jp-calendar.plugrail.dev.

Is the plugrail-dev API ready for AI agents?

plugrail-dev has a Kin Score of 23.9 out of 100 (emerging) and an Agent Readiness score of 6.3 (agent-aware), scored by API Evangelist on 2026-10-31.

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