Oystehr

Oystehr provides a developer‑first, headless electronic health record (EHR) platform that is ONC certified. It offers a comprehensive set of APIs and infrastructure enabling developers to build next‑generation health‑tech applications, including telehealth, messaging, eRx, insurance validation, and claims submission, all at a fraction of traditional costs.

Oystehr publishes 1 API contract indexed on the APIs.io network. Tagged areas include Company, HealthTech, EHR, API, and DeveloperFirst.

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

Oystehr’s developer surface includes changelog, authentication, getting-started guide, documentation, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

32.4/100 thin Agent 23/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

8 published contracts 1 Agent Skills

CompanyHealthTechEHRAPIDeveloperFirst

Kin Score

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

Composite quality — 32.4/100 · thin

Contract Quality 12.0 / 21

Developer Ergonomics 5.7 / 17

Access Clarity 0.0 / 17

Operational Transparency 1.7 / 11

Contract Governance 2.2 / 10

Discoverability 5.8 / 9

Regulatory Posture 2.0 / 15

Agent readiness — 23/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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

Pagination 5 / 5

Distinct Operations 0 / 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
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
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

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 0.0 — up to +20.0 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/oystehr/apis.yml: open an issue on github.com/api-evangelist/oystehr 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 1

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

Oystehr API

Oystehr API as documented publicly: 19 operations. Contract generated from the documentation by API Evangelist (2026-10-27); not the provider's own document.

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

sample-skill

AGENT SKILL

Semantic Vocabularies 1

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

Oystehr Context

7 classes · 8 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Oystehr API Rules

11 rules · 9 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 2

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.

Oystehr Erx Service Overlay

0 actions · update · oystehr-erx-service-documentation-api-openapi.yml

UNRECORDED

Oystehr Fax Service Overlay

0 actions · update · oystehr-fax-service-documentation-api-openapi.yml

UNRECORDED

JSON Schema 6

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

GetR4ExportJobIdResponse

3 properties

JSON SCHEMA

GetR4GroupIdExportResponse

3 properties

JSON SCHEMA

GetR4Practitioner2419A78E4C0A411DB9E290Dc081F5EfaResponse

2 properties

JSON SCHEMA

GetRestSearchCurrentResponse

2 properties

JSON SCHEMA

PatchV1ZambdaZambdaidRequest

1 properties

JSON SCHEMA

PostV1ZambdaYourZambdaIdExecuteResponse

2 properties

JSON SCHEMA

Security Posture 2

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

Oystehr Authentication

3 schemes

SECURITY

Oystehr Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Oystehr Agentic Access

1377 operations · 627 acting · 4 human-in-the-loop

1377 operations · 627 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

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

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: oystehr
name: Oystehr
description: Oystehr provides a developer‑first, headless electronic health record (EHR) platform that is ONC certified. It
  offers a comprehensive set of APIs and infrastructure enabling developers to build next‑generation health‑tech applications,
  including telehealth, messaging, eRx, insurance validation, and claims submission, all at a fraction of traditional costs.
url: https://raw.githubusercontent.com/api-evangelist/oystehr/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-27'
modified: '2026-10-27'
tags:
- Company
- HealthTech
- EHR
- API
- DeveloperFirst
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/oystehr-rules.yml
- type: JSONLD
  url: json-ld/oystehr-context.jsonld
- type: Vocabulary
  url: vocabulary/oystehr-vocabulary.yml
- type: DataModel
  url: data-model/oystehr-data-model.yml
- type: ChangeLog
  url: changelog/oystehr-changelog.yml
- type: Authentication
  url: authentication/oystehr-authentication.yml
- type: Conformance
  url: conformance/oystehr-conformance.yml
- type: Hosts
  url: hosts/oystehr-hosts.yml
- type: Vendors
  url: vendors/oystehr-vendors.yml
- type: GettingStarted
  url: https://docs.oystehr.com/ottehr/setup/introduction/
- type: Documentation
  url: https://docs.oystehr.com/
- type: DomainSecurity
  url: security/oystehr-domain-security.yml
- type: Website
  url: https://oystehr.com/
apis:
- aid: oystehr:oystehr-api
  name: Oystehr API
  description: 'Oystehr API as documented publicly: 19 operations. Contract generated from the documentation by API Evangelist
    (2026-10-27); not the provider''s own document.'
  humanURL: https://docs.oystehr.com/oystehr/services/iam/m2m-clients
  baseURL: https://extensions.fhir.oystehr.com
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/oystehr-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/oystehr-get-r4-export-job-id-response-schema.json
  - type: JSONSchema
    url: json-schema/oystehr-get-r4-group-id-export-response-schema.json
  - type: JSONSchema
    url: json-schema/oystehr-get-rest-search-current-response-schema.json
  - type: JSONSchema
    url: json-schema/oystehr-post-v1-zambda-your-zambda-id-execute-response-schema.json
  - type: JSONSchema
    url: json-schema/oystehr-get-r4-practitioner2419-a78-e4-c0-a411-db9-e290-dc081-f5-efa-response-schema.json
  - type: JSONSchema
    url: json-schema/oystehr-patch-v1-zambda-zambdaid-request-schema.json
x-submission-probe: 200 2026-10-25
x-coverage:
  state: blocked
  reason: bot-challenge
  method: derived
  generated: '2026-10-27'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company's own front door answers a browser with an anti-bot challenge, so nothing behind it is reachable by
    any reader
  evidence:
  - url: https://docs.oystehr.com/mcp
    status: 403
  - url: https://oystehr.com/
    status: 403
x-enrichment:
  date: '2026-10-27'
  status: enriched
  artifacts_added: 21
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Oystehr API — frequently asked questions

Does Oystehr have an API?

Yes. APIs.io lists 1 API from Oystehr, including Oystehr API.

Is there an OpenAPI specification for the Oystehr API?

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

How do I authenticate with the Oystehr API?

Oystehr uses bearer-token authentication (3 schemes). The details are profiled on APIs.io as Oystehr Authentication.

Is the Oystehr API ready for AI agents?

Oystehr has a Kin Score of 32.4 out of 100 (thin) and an Agent Readiness score of 22.5 (agent-aware), scored by API Evangelist on 2026-10-31.

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