UK Civil Aviation Authority

The UK Civil Aviation Authority (CAA) is the United Kingdom's independent aviation regulator and a public corporation of the Department for Transport. It licenses UK airlines, registers UK civil aircraft on the G-INFO register, regulates airspace and airports, economically regulates Heathrow and Gatwick, enforces UK air passenger rights, and — the part that matters most to travel distribution — runs the Air Travel Organiser's Licence (ATOL) scheme, which is the statutory gate every business selling flight-inclusive packages to UK consumers must pass through, including sellers established outside the UK. The CAA sits above the distribution chain rather than inside it: it does not distribute inventory, does not operate a GDS or NDC connection, and has no NDC posture of its own. Its API posture is thin and honest to record — there is no developer portal, no OpenAPI, and no published aviation data API. The only documented, self-serve, key-free public API on a CAA domain is the Citizen Space (Delib) consultation API at consultations.caa.co.uk/api, a vendor platform API rather than an aviation data API. The aviation surfaces that do exist — the G-INFO aircraft register search and the Check an ATOL search — are undocumented ASP.NET JSON backends whose CORS policy is locked to www.caa.co.uk and which are reCAPTCHA-gated. Bulk aviation data is delivered as CSV, PDF and XLSX files behind opaque GUID download URLs, and the full G-INFO aircraft register is a paid subscription emailed as an MS Excel file licensed for use on a single PC. Home market is the United Kingdom.

UK Civil Aviation Authority publishes 1 API on the APIs.io network: CAA Consultations API. Tagged areas include Travel, United Kingdom, Aviation, Airline, and Airports.

UK Civil Aviation Authority’s developer surface includes authentication, changelog, documentation, pricing, engineering blog, YouTube channel, support, and 38 more developer resources.

🌐 Visit website 📡 Source on GitHub

47.1/100 developing ▬ flat Agent 26/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Travel United Kingdom Aviation Airline Airports Regulator Government Distribution Consumer Protection Open Data

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 47.1/100 · developing

Contract Quality 13.3 / 21

Developer Ergonomics 8.4 / 17

Access Clarity 3.6 / 17

Operational Transparency 2.9 / 11

Contract Governance 0.8 / 10

Discoverability 7.4 / 9

Regulatory Posture 7.5 / 15

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/.

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 github.com/api-evangelist/uk-caa: open an issue to ask a question, or submit a pull request to add artifacts. 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.

CAA Consultations API

The Citizen Space (Delib) public consultation API deployed on the CAA's consultations domain. Two documented methods — json_search_results and json_consultation_details — return...

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

CAA Consultations API (Citizen Space 2.4)

OPEN COLLECTION

Arazzo Workflows 1

Multi-step API workflows described with the Arazzo specification.

Track UK CAA consultations

Search the UK Civil Aviation Authority's published consultation activities, then pull the full detail record for the first match.

ARAZZO

JSON Schema 4

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

Consultation activity

32 properties

JSON SCHEMA

RelatedLink

2 properties

JSON SCHEMA

SupportingDocument

3 properties

JSON SCHEMA

Term

2 properties

JSON SCHEMA

Examples 1

Example request and response payloads for these APIs.

Uk Caa Json Consultation Details All

31 fields

EXAMPLE

Security Posture 3

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

Uk Caa Authentication

none · 0 schemes

SECURITY

Uk Caa Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Uk Caa Vulnerability Disclosure

security.txt

SECURITY

Agentic Access 1

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

Uk Caa Agentic Access

2 operations

2 operations · 0 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

CustomerPortal

CustomerPortal

Registry

Registry

Registry

Registry

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

Documentation

Documentation

Agent Surfaces 6

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

AgenticAccess

WellKnown

LLMsTxt

LLMsTxt

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions

Lifecycle

Conformance

ErrorCatalog

DataModel

Vocabulary

Arazzo

Scroll for all 7

Build 1

SDKs, sample code, and the tooling you integrate with

Packages

Packages

Access & Security 7

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

Security

SecurityTxt

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

SecurityTxt

SecurityTxt

Scroll for all 7

Learn 1

Tutorials, courses, talks, and written guidance

YouTube

YouTube

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

Support

Support

Commercial 5

Pricing, plans, and the legal terms of use

Pricing

PrivacyPolicy

Legal

Legal

Legal

Company 4

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Instagram

Instagram

Other 7

Properties that don't map to a standard resource type

CapabilityMap

Accessibility

Dataset

Dataset

Dataset

Dataset

Scroll for all 7

Source (apis.yml)

aid: uk-caa
url: https://raw.githubusercontent.com/api-evangelist/uk-caa/refs/heads/main/apis.yml
name: UK Civil Aviation Authority
kind: company
description: 'The UK Civil Aviation Authority (CAA) is the United Kingdom''s independent aviation regulator and a public corporation
  of the Department for Transport. It licenses UK airlines, registers UK civil aircraft on the G-INFO register, regulates
  airspace and airports, economically regulates Heathrow and Gatwick, enforces UK air passenger rights, and — the part that
  matters most to travel distribution — runs the Air Travel Organiser''s Licence (ATOL) scheme, which is the statutory gate
  every business selling flight-inclusive packages to UK consumers must pass through, including sellers established outside
  the UK. The CAA sits above the distribution chain rather than inside it: it does not distribute inventory, does not operate
  a GDS or NDC connection, and has no NDC posture of its own. Its API posture is thin and honest to record — there is no developer
  portal, no OpenAPI, and no published aviation data API. The only documented, self-serve, key-free public API on a CAA domain
  is the Citizen Space (Delib) consultation API at consultations.caa.co.uk/api, a vendor platform API rather than an aviation
  data API. The aviation surfaces that do exist — the G-INFO aircraft register search and the Check an ATOL search — are undocumented
  ASP.NET JSON backends whose CORS policy is locked to www.caa.co.uk and which are reCAPTCHA-gated. Bulk aviation data is
  delivered as CSV, PDF and XLSX files behind opaque GUID download URLs, and the full G-INFO aircraft register is a paid subscription
  emailed as an MS Excel file licensed for use on a single PC. Home market is the United Kingdom.'
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-02'
  method: derived
image: https://www.caa.co.uk/apple-touch-icon.png
tags:
- Travel
- United Kingdom
- Aviation
- Airline
- Airports
- Regulator
- Government
- Distribution
- Consumer Protection
- Open Data
created: '2026-07-28'
modified: '2026-07-28'
specificationVersion: '0.23'
apis:
- aid: uk-caa:caa-consultations-api
  name: CAA Consultations API
  description: The Citizen Space (Delib) public consultation API deployed on the CAA's consultations domain. Two documented
    methods — json_search_results and json_consultation_details — return published CAA consultation activities as JSON with
    no API key and no signup. Versions 2.0 through 2.4 are served concurrently. Verified live 2026-07-28 (HTTP 200, JSON array).
    This is the only documented, publicly callable API on a caa.co.uk domain; it is the vendor's platform API, not a CAA aviation
    data API.
  humanURL: https://consultations.caa.co.uk/api/2.4/
  baseURL: https://consultations.caa.co.uk/api/2.4
  tags:
  - Consultations
  - Government
  - United Kingdom
  properties:
  - type: Documentation
    url: https://consultations.caa.co.uk/api/2.4/
  - type: Documentation
    url: https://consultations.caa.co.uk/api/
  - type: APIReference
    url: https://consultations.caa.co.uk/api/2.4/
  - type: APIReference
    url: https://consultations.caa.co.uk/api/2.3/
  - type: GettingStarted
    name: API v2.x Developers' Guide
    url: https://help.delib.net/article/350-api-v2-x-developers-guide
  - type: OpenAPI
    name: CAA Consultations API 2.4 (transcribed by API Evangelist from the published reference)
    url: openapi/uk-caa-consultations-api-openapi.yml
  - type: Overlay
    url: overlays/uk-caa-consultations-api-overlay.yaml
  - type: Examples
    name: Verified live json_search_results response (st=open, fields=all)
    url: examples/uk-caa-json-search-results-open-all.json
  - type: Examples
    name: Verified live json_consultation_details response (fields=all)
    url: examples/uk-caa-json-consultation-details-all.json
  - type: JSONSchema
    name: Consultation activity (derived from the transcribed OpenAPI)
    url: json-schema/uk-caa-activity.json
  - type: JSONSchema
    name: Term (audience, area or interest)
    url: json-schema/uk-caa-term.json
  - type: JSONSchema
    name: Supporting document
    url: json-schema/uk-caa-supporting-document.json
  - type: JSONSchema
    name: Related link
    url: json-schema/uk-caa-related-link.json
  - type: Vocabulary
    name: CAA consultation vocabulary derived from the full live corpus (294 activities)
    url: vocabulary/uk-caa-vocabulary.yml
  - type: Website
    url: https://consultations.caa.co.uk/
common:
- type: CapabilityMap
  url: capabilities/uk-caa-capability-edges.yml
  name: UK Civil Aviation Authority Business Capability Map
- type: X-MCPServerCandidate
  url: mcp/uk-caa-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgenticAccess
  url: agentic-access/uk-caa-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/uk-caa-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/uk-caa-domain-security.yml
- type: Security
  name: CAA Vulnerability Disclosure Policy
  url: https://www.caa.co.uk/website-policies/vulnerability-disclosure-policy/
- type: WellKnown
  url: well-known/uk-caa-well-known.yml
- type: SecurityTxt
  name: security.txt captured verbatim 2026-07-28
  url: well-known/uk-caa-security.txt
- type: LLMsTxt
  name: CAA llms.txt (provider-published, captured verbatim)
  url: llms/uk-caa-llms.txt
- type: LLMsTxt
  name: ATOL llms.txt (provider-published, captured verbatim)
  url: llms/uk-caa-atol-llms.txt
- type: Authentication
  url: authentication/uk-caa-authentication.yml
- type: Conventions
  url: conventions/uk-caa-conventions.yml
- type: Lifecycle
  url: lifecycle/uk-caa-lifecycle.yml
- type: ChangeLog
  name: Citizen Space API version history reconstructed from the 2.0-2.4 reference pages
  url: changelog/uk-caa-changelog.yml
- type: Conformance
  url: conformance/uk-caa-conformance.yml
- type: ErrorCatalog
  url: errors/uk-caa-problem-types.yml
- type: DataModel
  url: data-model/uk-caa-data-model.yml
- type: Vocabulary
  name: UK CAA consultation vocabulary — 19 workspaces, 47 audiences, 43 interests, derived from 294 live activities
  url: vocabulary/uk-caa-vocabulary.yml
- type: Packages
  name: Registry search record — the CAA publishes no SDK or client library in any language
  url: packages/uk-caa-packages.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Arazzo
  name: Track UK CAA consultations
  url: arazzo/uk-caa-track-consultations.yml
- type: Website
  url: https://www.caa.co.uk/
- type: Documentation
  url: https://www.caa.co.uk/data-and-analysis/
- type: Documentation
  name: CAA publications (CAP documents) — the authoritative regulatory library
  url: https://www.caa.co.uk/publications/
- type: Pricing
  name: G-INFO forms and fees — pricing and licence terms for the UK aircraft register data product. The CAA's only published
    price list for machine-usable data; there is no API pricing because there is no commercial API programme.
  url: https://www.caa.co.uk/aircraft-register/g-info/g-info-forms-and-fees/
- type: Blog
  url: https://www.caa.co.uk/newsroom/news/
- type: LinkedIn
  url: https://www.linkedin.com/company/civil-aviation-authority
- type: X
  url: https://x.com/UK_CAA
- type: YouTube
  url: https://www.youtube.com/user/UKCAA
- type: Instagram
  url: https://www.instagram.com/uk.caa
- type: VulnerabilityDisclosure
  url: https://www.caa.co.uk/website-policies/vulnerability-disclosure-policy/
- type: SecurityTxt
  url: https://www.caa.co.uk/.well-known/security.txt
- type: CustomerPortal
  name: CAA Customer Portal — ADFS sign-in for licence and certificate holders. NOT a developer portal; the CAA publishes
    none.
  url: https://portal.caa.co.uk
- type: PrivacyPolicy
  url: https://www.caa.co.uk/about-us/the-civil-aviation-authority/general-privacy-notice/
- type: Support
  name: Contact the CAA (general enquiries — there is no developer support channel)
  url: https://www.caa.co.uk/about-us/information-requests/contact-us/
- type: Accessibility
  url: https://www.caa.co.uk/website-policies/accessibility-statement/
- type: Registry
  url: https://www.caa.co.uk/aircraft-register/g-info/search-g-info/
- type: Registry
  url: https://www.caa.co.uk/atol-protection/check-an-atol/search-atol-holders/
- type: Dataset
  url: https://www.caa.co.uk/data-and-analysis/uk-aviation-market/airports/uk-airport-data/
- type: Dataset
  url: https://www.caa.co.uk/data-and-analysis/uk-aviation-market/flight-punctuality/uk-flight-punctuality-statistics/
- type: Dataset
  url: https://www.caa.co.uk/atol-protection/check-an-atol/atol-reports/
- type: Dataset
  url: https://ckan.publishing.service.gov.uk/api/3/action/organization_show?id=civil-aviation-authority
- type: Legal
  url: https://www.caa.co.uk/atol-protection/atol-requirements-for-the-travel-industry/do-i-need-an-atol/
- type: Legal
  url: https://www.caa.co.uk/atol-protection/atol-compliance/requirements-legal-obligations/airline-ticket-agents/
- type: Legal
  url: https://www.caa.co.uk/about-us/information-requests/accessing-information-held-by-the-caa/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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