System

System provides a platform that models the world as an interconnected system, delivering structured clinical knowledge, ontologies, and a graph‑based API to support diagnostic accuracy, clinical decision‑making, and population health risk management for healthcare organizations and researchers.

System publishes 2 API contracts indexed on the APIs.io network, including REST API API, and 1 more. Tagged areas include Healthcare, Population Health, Knowledge Graph, API Platform, and Public Benefit Corporation.

The System catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

System’s developer surface includes changelog, authentication, engineering blog, getting-started guide, API reference, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

37.6/100 thin Agent 19/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract

Healthcare Population Health Knowledge Graph API Platform Public Benefit Corporation

Kin Score

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

Composite quality — 37.6/100 · thin

Contract Quality 12.0 / 21

Developer Ergonomics 5.7 / 17

Access Clarity 3.6 / 17

Operational Transparency 1.7 / 11

Contract Governance 2.2 / 10

Discoverability 5.8 / 9

Regulatory Posture 2.9 / 15

Agent readiness — 19/100 · 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 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 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):

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
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

9 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 21.1 — up to +15.8 composite points
Developer Ergonomics scores 33.3 — up to +13.3 composite points
Operational Transparency scores 15.8 — up to +10.9 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/system/apis.yml: open an issue on github.com/api-evangelist/system 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 →

APIs 2

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

System REST API

System REST API providing clinical graph endpoints

System REST API API

This page provides documentation for the System REST API.

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

System Context

50 classes · 96 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

System API Rules

17 rules · 14 errors 1 warnings 2 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

System Openapi Overlay

0 actions · update

UNRECORDED

JSON Schema 6

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

MechanisticFinding

10 properties

JSON SCHEMA

PubmedSearchSynthesisJob

10 properties

JSON SCHEMA

Relationship

10 properties

JSON SCHEMA

StatisticalFinding

15 properties

JSON SCHEMA

Study

13 properties

JSON SCHEMA

Topic

6 properties

JSON SCHEMA

Security Posture 2

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

System Authentication

1 scheme

SECURITY

System Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 3

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Leadership

Leadership

Source (apis.yml)

aid: system
name: System
image: https://cdn.prod.website-files.com/66e9dff32a2060cb9fa715a8/69a865335351c82eb8750ffc_system_opengraph.png
description: System provides a platform that models the world as an interconnected system, delivering structured clinical
  knowledge, ontologies, and a graph‑based API to support diagnostic accuracy, clinical decision‑making, and population health
  risk management for healthcare organizations and researchers.
url: https://raw.githubusercontent.com/api-evangelist/system/refs/heads/main/apis.yml
x-type: company
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-24 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-24'
modified: '2026-10-24'
tags:
- Healthcare
- Population Health
- Knowledge Graph
- API Platform
- Public Benefit Corporation
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/system-rules.yml
- type: JSONLD
  url: json-ld/system-context.jsonld
- type: Vocabulary
  url: vocabulary/system-vocabulary.yml
- type: DataModel
  url: data-model/system-data-model.yml
- type: ChangeLog
  url: changelog/system-changelog.yml
- type: Authentication
  url: authentication/system-authentication.yml
- type: ErrorCatalog
  url: errors/system-problem-types.yml
- type: Conformance
  url: conformance/system-conformance.yml
- type: LLMsTxt
  url: llms/system-llms.txt
- type: WellKnown
  url: well-known/system-well-known.yml
- type: Hosts
  url: hosts/system-hosts.yml
- type: Vendors
  url: vendors/system-vendors.yml
- type: TermsOfService
  url: https://docs.system.com/system/legal/legal/terms-of-use
- type: PrivacyPolicy
  url: https://docs.system.com/system/legal/legal/privacy-policy
- type: Leadership
  url: https://www.system.com/company/team
- type: Blog
  url: https://www.system.com/blog
- type: GettingStarted
  url: https://docs.system.com/system/public/quick-start-guide
- type: APIReference
  url: https://api-docs.system.com/
- type: DomainSecurity
  url: security/system-domain-security.yml
- type: Website
  url: https://system.com
apis:
- name: System REST API
  description: System REST API providing clinical graph endpoints
  humanURL: https://docs.system.com/system/public/v1.0-api-documentation.md
  baseURL: https://api-prod.system.com
  properties: []
  aid: system:system-rest-api
- aid: system:system-rest-api-api
  name: System REST API API
  description: This page provides documentation for the System REST API.
  humanURL: https://api-docs.system.com/
  baseURL: https://api-prod.system.com
  properties:
  - type: OpenAPI
    url: openapi/_original/system-api-openapi.json
  - type: JSONSchema
    url: json-schema/system-statistical-finding-schema.json
  - type: JSONSchema
    url: json-schema/system-relationship-schema.json
  - type: JSONSchema
    url: json-schema/system-study-schema.json
  - type: JSONSchema
    url: json-schema/system-mechanistic-finding-schema.json
  - type: JSONSchema
    url: json-schema/system-pubmed-search-synthesis-job-schema.json
  - type: JSONSchema
    url: json-schema/system-topic-schema.json
x-backed-by:
- true-ventures
x-enrichment:
  date: '2026-10-24'
  status: enriched
  artifacts_added: 29
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

System API — frequently asked questions

Does System have an API?

Yes. APIs.io lists 2 APIs from System, including System REST API and System REST API API.

Is there an OpenAPI specification for the System API?

Yes. APIs.io indexes 1 OpenAPI specification for System, each linked for download from this page.

How do I authenticate with the System API?

System uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as System Authentication.

Is the System API ready for AI agents?

System has a Kin Score of 37.6 out of 100 (thin) and an Agent Readiness score of 19.1 (agent-aware), scored by API Evangelist on 2026-10-31.

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.

All 92 tools →

Call it yourself

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Every operation they expose

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How their score was established

curl "https://apis.io/api/v1/providers/system/evidence"

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