United Kingdom Hydrographic Office (UKHO)

The United Kingdom Hydrographic Office (UKHO) is an executive agency of the UK Ministry of Defence that sells hydrographic and marine geospatial data, nautical charts, publications and digital navigation services under the Admiralty brand. It supplies these products to mariners, shipping companies, defence users and other maritime stakeholders worldwide to support safe, efficient and compliant navigation.

United Kingdom Hydrographic Office (UKHO) is profiled on the APIs.io network. Tagged areas include Hydrography, Nautical Charts, Maritime Navigation, Defence, and Marine Data.

🌐 Visit website 📡 Profile data on GitHub

16.7/100 emerging Agent 6/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

0 APIs

HydrographyNautical ChartsMaritime NavigationDefenceMarine DataAdmiralty Products

Kin Score

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

Composite quality — 16.7/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.8 / 17

Access Clarity 5.8 / 17

Operational Transparency 1.7 / 11

Contract Governance 0.0 / 10

Discoverability 3.9 / 9

Regulatory Posture 2.1 / 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 0 / 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

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
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
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

11 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 16.7 — up to +16.7 composite points
Access Clarity scores 34.2 — up to +13.2 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/united-kingdom-hydrographic-office-ukho/apis.yml: open an issue on github.com/api-evangelist/united-kingdom-hydrographic-office-ukho 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 →

Security Posture 1

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

United Kingdom Hydrographic Office Ukho Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

DeveloperPortal

DeveloperPortal

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

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

SecurityTxt

SecurityTxt

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Newsroom

Newsroom

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: united-kingdom-hydrographic-office-ukho
name: United Kingdom Hydrographic Office (UKHO)
description: The United Kingdom Hydrographic Office (UKHO) is an executive agency of the UK Ministry of Defence that sells
  hydrographic and marine geospatial data, nautical charts, publications and digital navigation services under the Admiralty
  brand. It supplies these products to mariners, shipping companies, defence users and other maritime stakeholders worldwide
  to support safe, efficient and compliant navigation.
url: https://raw.githubusercontent.com/api-evangelist/united-kingdom-hydrographic-office-ukho/refs/heads/main/apis.yml
x-type: company
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-26 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-26'
modified: '2026-10-26'
tags:
- Hydrography
- Nautical Charts
- Maritime Navigation
- Defence
- Marine Data
- Admiralty Products
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: LLMsTxt
  url: llms/united-kingdom-hydrographic-office-ukho-llms.txt
- type: SecurityTxt
  url: well-known/united-kingdom-hydrographic-office-ukho-www-security.txt
- type: WellKnown
  url: well-known/united-kingdom-hydrographic-office-ukho-well-known.yml
- type: Hosts
  url: hosts/united-kingdom-hydrographic-office-ukho-hosts.yml
- type: Vendors
  url: vendors/united-kingdom-hydrographic-office-ukho-vendors.yml
- type: SDKs
  url: packages/united-kingdom-hydrographic-office-ukho-packages.yml
- type: Packages
  url: packages/united-kingdom-hydrographic-office-ukho-packages.yml
- type: TermsOfService
  url: https://www.admiralty.co.uk/terms-and-conditions
- type: PrivacyPolicy
  url: https://www.admiralty.co.uk/privacy-policy
- type: Newsroom
  url: https://www.admiralty.co.uk/news
- type: Login
  url: https://www.admiralty.co.uk/sso/openid_connect/login/windows_aad
- type: DeveloperPortal
  url: https://developer.admiralty.co.uk/
- type: GitHubOrganization
  url: https://github.com/UKHO
- type: DomainSecurity
  url: security/united-kingdom-hydrographic-office-ukho-domain-security.yml
- type: Website
  url: http://www.ukho.gov.uk
apis: []
x-coverage:
  state: none
  reason: no-developer-program
  method: derived
  generated: '2026-10-26'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company publishes no developer documentation host and no machine-readable contract on its own domain
  evidence:
  - url: http://www.ukho.gov.uk
    status: 200
x-enrichment:
  date: '2026-10-26'
  status: enriched
  artifacts_added: 11
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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