YellowBrink

YellowBrink is a Netherlands-based, vendor-neutral community platform for open health data, founded by Jan de Lange and Bouwe Koopal to connect healthcare professionals, vendors, researchers and policymakers working with open standards such as openEHR, HL7 FHIR, OMOP and SNOMED CT. The name pairs the Yellow Pages — showing who builds what — with "brink", the Dutch word for the village square where a community gathers. It runs weekly webinars in cooperation with openEHR NL, country and topic special-interest groups, and discussion and co-creation rooms, hosts "The Brink" partner and meeting area at the EHRCON26 conference in Amsterdam, and is developing a postdoctoral European Master of Data Availability programme with European universities and hospital systems. The platform is a white-labelled Innoloft LoftOS tenant; YellowBrink itself publishes no public API, SDK or developer program.

YellowBrink is profiled on the APIs.io network. Tagged areas include Company, Healthcare, Health Data, openEHR, and Interoperability.

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4.1/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

0 APIs

Company Healthcare Health Data openEHR Interoperability Standards Community Education Event Netherlands

Kin Score

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

Composite quality — 4.1/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.4 / 9

Regulatory Posture 0.7 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 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 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

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Health 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
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

13 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 0.0 — up to +20.0 composite points
Access Clarity scores 0.0 — up to +20.0 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/yellowbrink/apis.yml: open an issue on github.com/api-evangelist/yellowbrink 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.

openEHR

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

Security Posture 1

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

Yellowbrink Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: yellowbrink
name: YellowBrink
description: YellowBrink is a Netherlands-based, vendor-neutral community platform for open health data, founded by Jan de
  Lange and Bouwe Koopal to connect healthcare professionals, vendors, researchers and policymakers working with open standards
  such as openEHR, HL7 FHIR, OMOP and SNOMED CT. The name pairs the Yellow Pages — showing who builds what — with "brink",
  the Dutch word for the village square where a community gathers. It runs weekly webinars in cooperation with openEHR NL,
  country and topic special-interest groups, and discussion and co-creation rooms, hosts "The Brink" partner and meeting area
  at the EHRCON26 conference in Amsterdam, and is developing a postdoctoral European Master of Data Availability programme
  with European universities and hospital systems. The platform is a white-labelled Innoloft LoftOS tenant; YellowBrink itself
  publishes no public API, SDK or developer program.
url: https://raw.githubusercontent.com/api-evangelist/yellowbrink/refs/heads/main/apis.yml
x-type: company
x-source: harvest:openehr-coalition
x-tier: stub
x-tier-reason: harvest
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: none
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-09-02'
modified: '2026-09-02'
tags:
- Company
- Healthcare
- Health Data
- openEHR
- Interoperability
- Standards
- Community
- Education
- Event
- Netherlands
tags_raw:
- Company
- Health Care
- Health Data
- openEHR
- Interoperability
- Standards
- Community
- Education
- Events
- Netherlands
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/yellowbrink-domain-security.yml
- type: LLMsTxt
  url: llms/yellowbrink-llms.txt
- type: Website
  url: https://www.yellowbrink.com/
x-enrichment:
  date: '2026-09-02'
  status: minimal
  artifacts_added: 3
  pass: local-v1
x-coverage:
  state: none
  reason: no-developer-program
  detail: YellowBrink is a community platform, not a software vendor — its site is a white-labelled Innoloft LoftOS single-page
    app that answers 200 with the identical 12,016-byte HTML shell for every path probed (including /openapi.json and every
    /.well-known/*), and the only API behind it, api.innoloft.com, belongs to Innoloft and returns 401 anonymously.
  evidence:
  - url: https://www.yellowbrink.com/openapi.json
    status: 200
  - url: https://www.yellowbrink.com/.well-known/agent-card.json
    status: 200
  - url: https://api.innoloft.com/openapi.json
    status: 401
  - url: https://www.yellowbrink.com/robots.txt
    status: 200
  checked: '2026-09-02'

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