Class Q Checker

Class Q Checker provides a free online tool to determine whether a barn conversion in England qualifies under Class Q permitted development. It offers detailed guidance, statutory tests, cost indexes, and links to legislation, helping users assess eligibility, required approvals, and planning considerations for converting agricultural buildings into dwellings.

Class Q Checker is listed with 1 API on the APIs.io network. Tagged areas include Class Q, Planning, United Kingdom, Real Estate, and Permitted Development.

The Class Q Checker catalog on APIs.io includes 1 Spectral governance ruleset.

Class Q Checker’s developer surface includes authentication, support, and 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

16.5/100 emerging Agent 11/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API 1 MCP Servers

Class QPlanning United Kingdom Real EstatePermitted Development

Kin Score

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

Composite quality — 16.5/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.4 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.6 / 11

Contract Governance 2.2 / 10

Discoverability 5.5 / 9

Regulatory Posture 4.0 / 15

Agent readiness — 11/100 · agent aware

Machine-Readable Contract 0 / 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 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 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

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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 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
Access Clarity scores 10.5 — up to +17.9 composite points
Developer Ergonomics scores 14.3 — up to +17.1 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/classqchecker-co-uk/apis.yml: open an issue on github.com/api-evangelist/classqchecker-co-uk 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 1

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 1

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

Class Q Checker API

API for Class Q Checker MCP tools

MCP Servers 1

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

Class Q Checker MCP Server

Remote MCP server at classqchecker.co.uk requiring an API key.

MCP SERVER

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Class Q Checker API Rules

50 rules · 48 errors 1 warnings 1 info

SPECTRAL

Security Posture 3

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

Classqchecker Co Uk Authentication

http · 1 scheme

SECURITY

Classqchecker Co Uk Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Classqchecker Co Uk Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Classqchecker Co Uk Agentic Access

1 operation · 1 acting

1 operations · 1 acting

AGENTIC

Resources

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

MCPServer

WellKnown

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Spectral

Vocabulary

ErrorCatalog

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Access & Security 5

Authentication, authorization, and security posture

Security

Security

SecurityTxt

SecurityTxt

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

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: classqchecker-co-uk
name: Class Q Checker
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://classqchecker.co.uk/og.png
description: Class Q Checker provides a free online tool to determine whether a barn conversion in England qualifies under
  Class Q permitted development. It offers detailed guidance, statutory tests, cost indexes, and links to legislation, helping
  users assess eligibility, required approvals, and planning considerations for converting agricultural buildings into dwellings.
url: https://artifacts.apis.io/classqchecker-co-uk/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-04 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-03'
modified: '2026-11-03'
tags:
- Class Q
- Planning
- United Kingdom
- Real Estate
- Permitted Development
tags_raw:
- Class Q
- Planning
- UK
- Real Estate
- Permitted Development
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/classqchecker-co-uk-agentic-access.yml
- type: Spectral
  url: rules/classqchecker-co-uk-rules.yml
- type: Vocabulary
  url: vocabulary/classqchecker-co-uk-vocabulary.yml
- type: Security
  url: https://classqchecker.co.uk/terms
- type: ErrorCatalog
  url: errors/classqchecker-co-uk-problem-types.yml
- type: Conformance
  url: conformance/classqchecker-co-uk-conformance.yml
- type: LLMsTxt
  url: llms/classqchecker-co-uk-llms.txt
- type: ToolCrosswalk
  url: mcp/classqchecker-co-uk-tool-crosswalk.yml
- type: MCPServer
  url: mcp/classqchecker-co-uk-mcp.yml
- type: SecurityTxt
  url: well-known/classqchecker-co-uk-security.txt
- type: WellKnown
  url: well-known/classqchecker-co-uk-well-known.yml
- type: Hosts
  url: hosts/classqchecker-co-uk-hosts.yml
- type: Vendors
  url: vendors/classqchecker-co-uk-vendors.yml
- type: TermsOfService
  url: https://classqchecker.co.uk/terms/
- type: PrivacyPolicy
  url: https://classqchecker.co.uk/privacy/
- type: Authentication
  url: authentication/classqchecker-co-uk-authentication.yml
- type: VulnerabilityDisclosure
  url: security/classqchecker-co-uk-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/classqchecker-co-uk-domain-security.yml
- type: Website
  url: https://classqchecker.co.uk/
- type: Support
  url: https://classqchecker.co.uk/contact/
apis:
- name: Class Q Checker API
  description: API for Class Q Checker MCP tools
  humanURL: https://classqchecker.co.uk/
  baseURL: https://classqchecker.co.uk
  aid: classqchecker-co-uk:class-q-checker-api
x-enrichment:
  date: '2026-11-04'
  status: enriched
  artifacts_added: 21
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Class Q Checker API — frequently asked questions

Does Class Q Checker have an API?

Yes. APIs.io lists 1 API from Class Q Checker, including Class Q Checker API.

How do I authenticate with the Class Q Checker API?

Class Q Checker uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Classqchecker Co Uk Authentication.

Does Class Q Checker have an MCP server?

Yes. APIs.io lists 1 MCP server for Class Q Checker: Remote MCP server at classqchecker.co.uk requiring an API key.

Is the Class Q Checker API ready for AI agents?

Class Q Checker has a Kin Score of 16.5 out of 100 (emerging) and an Agent Readiness score of 11.4 (agent-aware), scored by API Evangelist on 2026-11-06.

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.

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