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Varian Medical Systems website screenshot

Varian Medical Systems

Varian Medical Systems is a leading manufacturer of medical devices and software for treating cancer with radiotherapy, radiosurgery, proton therapy, and brachytherapy. Acquired by Siemens Healthineers in 2021, Varian provides the ARIA Oncology Information System (OIS) and developer APIs enabling integration with clinical workflows, EHR systems, and the broader healthcare ecosystem using HL7, DICOM, and FHIR standards.

agent ready

Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.

Kin Score

API Evangelist profiles Varian Medical Systems the way a machine reads it — 27 machine-readable artifacts across 12 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Varian Medical Systems scores 50.6/100 (developing), with a separate agent-readiness read of 48/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 50.6/100 · developing
Contract Quality 17.4 / 25
Developer Ergonomics 5.7 / 20
Commercial Clarity 5.8 / 20
Operational Transparency 2.7 / 13
Governance 8.8 / 12
Discoverability 8.8 / 10
Regulatory · Health 8.8 / 15
Agent readiness — 48/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3

How we profile Varian Medical Systems

Each block below is one kind of artifact we hold for Varian Medical Systems. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 12

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

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

ARIA Access API

The legacy ARIA Access API provides SOAP and REST access to core ARIA entities including patients, appointments, prescriptions, treatment plans, orders, and administrative data....

Varian Medical Systems AllergyIntolerance API

Patient allergy and intolerance records

Varian Medical Systems CarePlan API

Oncology treatment and care plans

Varian Medical Systems Condition API

Cancer diagnoses and clinical conditions

Varian Medical Systems DiagnosticReport API

Pathology, imaging, and treatment reports

Varian Medical Systems DocumentReference API

Clinical document management

Varian Medical Systems Goal API

Treatment goals and objectives

Varian Medical Systems MedicationRequest API

Chemotherapy and medication prescriptions

Varian Medical Systems Metadata API

FHIR server capability and metadata

Varian Medical Systems Observation API

Labs, vitals, and clinical measurements

Varian Medical Systems Patient API

Oncology patient demographics and identifiers

Varian Medical Systems Procedure API

Radiation therapy and other clinical procedures

Scroll within the panel for all 12 ·

Open Collections 1

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

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

Varian ARIA FHIR API

OPEN COLLECTION

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

Cost, billing, and metering signals for API financial operations.

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

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

Varian Medical Systems Context

15 classes · 20 properties

JSON-LD

Spectral Rules 2

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Varian Medical Systems API Rules

5 rules · 3 warnings

SPECTRAL

Varian Medical Systems API Rules

8 rules · 2 errors · 5 warnings

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

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

Varian ARIA Patient

10 properties

JSON SCHEMA

JSON Structure 1

JSON Structure captures the data shapes in a form built for tooling — a complement to JSON Schema that keeps the model machine-legible.

JSON Structure definitions describing this provider's data shapes.

Varian Patient Structure

0 properties

JSON STRUCTURE

Examples 2

Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.

Example request and response payloads for these APIs.

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

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

Varian Medical Systems Authentication

oauth2 · 1 scheme

SECURITY

Varian Medical Systems Domain Security

TLSv1.2 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.

OAuth scopes governing access to this provider's APIs.

Varian Medical Systems Scopes

11 scopes · authorizationCode

11 scopes

SCOPES

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

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

Varian Medical Systems Agentic Access

16 operations

16 operations · 0 acting

AGENTIC

Resources

Every other property we hold for Varian Medical Systems — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Get Started 1

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Access & Security 3

Authentication, authorization, and security posture

Company 3

The organization behind the API

← All providers · Data indexed from github.com/api-evangelist/varian-medical-systems · machine-readable index on apis.io