Patients Know Best

Patients Know Best (PKB) is a UK health-technology company operating what it describes as the world's largest personal health record, with more than seven million registered patients across the NHS and other health systems. The platform lets patients hold, view and share their medical records, messages, test results, care plans and questionnaires with clinicians and carers across web, mobile and the NHS App. For integrators, PKB publishes a HL7 FHIR STU3 (3.0.2) API — the "Facade" FHIR server at my.patientsknowbest.com/fhir — that conforms to the NHS CareConnect profiles and exposes patient demographics, documents, observations, appointments, consent, questionnaires and read receipts, secured with OAuth 2.0 client-credentials. PKB was surfaced as a Seedcamp portfolio company and enriched into the API Evangelist network.

Patients Know Best is listed with 1 API on the APIs.io network. Tagged areas include Company, Health, Healthcare, Electronic Health Records, and Personal Health Record.

Patients Know Best’s developer surface includes engineering blog, documentation, API reference, support, signup flow, changelog, authentication, and 24 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

41.9/100 developing ▬ flat Agent 17/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

AccessSelf serve

1 API

Company Health Healthcare Electronic Health RecordsPersonal Health RecordFHIR Interoperability NHS Patient Data Medical Records

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 41.9/100 · developing

Contract Quality 6.9 / 21

Developer Ergonomics 8.4 / 17

Access Clarity 5.4 / 17

Operational Transparency 5.2 / 11

Contract Governance 1.9 / 10

Discoverability 6.2 / 9

Regulatory Posture 3.8 / 15

Agent readiness — 17/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 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 5 / 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

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/.

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/patients-know-best: 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 →

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.

HL7 FHIR

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

APIs 1

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

PKB Facade FHIR API

HL7 FHIR STU3 (3.0.2) "Facade" server exposing Patients Know Best personal health record data — Patient, Appointment, Communication, Consent, DiagnosticReport, DocumentReference...

Security Posture 3

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

Patients Know Best Authentication

oauth2 · 1 scheme

SECURITY

Patients Know Best Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Patients Know Best Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

LLMsTxt

WellKnown

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

Conformance

ErrorCatalog

Lifecycle

DataModel

Access & Security 6

Authentication, authorization, and security posture

DomainSecurity

Authentication

Compliance

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 4

Status, limits, changes, and where to get help

Roadmap

Support

StatusPage

ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 5

The organization behind the API

Blog

BlogRSS

Website

Blog

Partners

Source (apis.yml)

aid: patients-know-best
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/patients-know-best.png
name: Patients Know Best
description: Patients Know Best (PKB) is a UK health-technology company operating what it describes as the world's largest
  personal health record, with more than seven million registered patients across the NHS and other health systems. The platform
  lets patients hold, view and share their medical records, messages, test results, care plans and questionnaires with clinicians
  and carers across web, mobile and the NHS App. For integrators, PKB publishes a HL7 FHIR STU3 (3.0.2) API — the "Facade"
  FHIR server at my.patientsknowbest.com/fhir — that conforms to the NHS CareConnect profiles and exposes patient demographics,
  documents, observations, appointments, consent, questionnaires and read receipts, secured with OAuth 2.0 client-credentials.
  PKB was surfaced as a Seedcamp portfolio company and enriched into the API Evangelist network.
url: https://raw.githubusercontent.com/api-evangelist/patients-know-best/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- seedcamp
x-tier: profiled
x-tier-reason: has-fhir-api
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 15
  pass: local-v1
tags:
- Company
- Health
- Healthcare
- Electronic Health Records
- Personal Health Record
- FHIR
- Interoperability
- NHS
- Patient Data
- Medical Records
apis:
- name: PKB Facade FHIR API
  description: HL7 FHIR STU3 (3.0.2) "Facade" server exposing Patients Know Best personal health record data — Patient, Appointment,
    Communication, Consent, DiagnosticReport, DocumentReference, Encounter, Observation, Questionnaire and QuestionnaireResponse
    resources — conforming to NHS CareConnect profiles, plus custom operations for purview, read-receipt queries and invitation-token
    generation. Secured with OAuth 2.0 client credentials.
  humanURL: https://wiki.patientsknowbest.com/space/api/3363602489/FHIR%C2%AE+APIs
  baseURL: https://my.patientsknowbest.com/fhir
  tags:
  - FHIR
  - Health
  - Electronic Health Records
  - NHS
  - Interoperability
  properties:
  - type: FHIR
    url: fhir/patients-know-best-facade-capabilitystatement.json
  - type: CapabilityStatement
    url: fhir/patients-know-best-facade-capabilitystatement.json
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://patientsknowbest.com/news/
  type: Blog
- url: https://patientsknowbest.com/feed/
  type: BlogRSS
- type: DomainSecurity
  url: security/patients-know-best-domain-security.yml
- type: Website
  url: https://patientsknowbest.com
- type: DeveloperPortal
  url: https://wiki.patientsknowbest.com/space/api
- type: Documentation
  url: https://wiki.patientsknowbest.com/space/api/3363602489/FHIR%C2%AE+APIs
- type: APIReference
  url: https://pkbdev.atlassian.net/wiki/spaces/api/pages/3363602541/FHIR+Conformance
- type: Roadmap
  url: https://wiki.patientsknowbest.com/space/api
- type: Support
  url: https://manual.patientsknowbest.com/
- type: Blog
  url: https://blog.patientsknowbest.com/
- type: PrivacyPolicy
  url: https://patientsknowbest.com/privacy-statement/
- type: SignUp
  url: https://patientsknowbest.com/register/
- type: Login
  url: https://my.patientsknowbest.com/
- type: StatusPage
  url: https://www.pkbstatus.com/
- type: ChangeLog
  url: https://wiki.patientsknowbest.com/space/REL
- type: Partners
  url: https://patientsknowbest.com/partners/
- type: Authentication
  url: authentication/patients-know-best-authentication.yml
- type: Conventions
  url: conventions/patients-know-best-conventions.yml
- type: Conformance
  url: conformance/patients-know-best-conformance.yml
- type: Compliance
  url: https://patientsknowbest.com
- type: ErrorCatalog
  url: errors/patients-know-best-problem-types.yml
- type: Lifecycle
  url: lifecycle/patients-know-best-lifecycle.yml
- type: DataModel
  url: data-model/patients-know-best-data-model.yml
- type: X-MCPServerCandidate
  url: mcp/patients-know-best-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: LLMsTxt
  url: llms/patients-know-best-llms.txt
- type: WellKnown
  url: well-known/patients-know-best-well-known.yml
- type: SecurityTxt
  url: well-known/patients-know-best-security.txt
- type: VulnerabilityDisclosure
  url: security/patients-know-best-vulnerability-disclosure.yml
- type: Security
  url: https://my.patientsknowbest.com/.well-known/security.txt
- type: AgentSkill
  url: skills/_index.yml
- type: Sandbox
  url: sandbox/patients-know-best-sandbox.yml
x-merged-from:
- patientsknowbest

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