Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 5 Complete, well-documented, and agent-ready

eClinicalWorks FHIR APIProvider-centric, backend and bulk FHIR R4 APIs for integrating with the eClinicalWorks EHR. Supports SMART...69.7 athenaOne APIsThe athenaOne proprietary REST API suite provides over 800 endpoints covering patient management, schedulin...69.1 NextGen Enterprise APIAn extensive collection of JSON-based RESTful APIs (800+ routes) that power apps used by provider organizat...66.7 NextGen Enterprise Patient Access FHIR APIHL7 FHIR API for the NextGen Enterprise EHR, certified under the 21st Century Cures Act Patient Access crit...66.7 NextGen Office FHIR R3 APIHL7 FHIR STU3 (R3) API for the NextGen Office EHR with C-CDA support, authenticated with SMART App Launch /...66.7

Strong 3 Solid coverage with minor gaps

Healthie GraphQL APIThe Healthie GraphQL API is the single contract behind the entire Healthie platform — the same API that pow...65.8 Canvas Medical FHIR APIA FHIR R4-compliant REST API providing secure access to electronic health record data including 41 FHIR res...62.5 Cadasto EHR APIAdmin management of [EHRs](https://specifications.openehr.org/releases/RM/latest/ehr.html#_ehr_class).55.5

Developing 11 Usable, with meaningful gaps to close

EHRbase EHR APIThe EHR API from EHRbase — 2 operation(s) for ehr.51.0 Cloud Healthcare HL7v2 APIThe Cloud Healthcare HL7v2 API provides managed ingestion, storage, and retrieval of HL7 version 2.x messag...50.4 vitagroup EHR APIThe EHR API from vitagroup — 2 operation(s) for ehr.49.4 Kareo Clinical Open APIThe Kareo Clinical Open API provides REST-based access to EHR clinical data, exposing patient clinical reco...44.8 MEDITECH Expanse FHIR APIMEDITECH's FHIR API surface for Expanse, exposed to approved developers through the Greenfield Workspace. U...43.6 ONC Health IT Open Data APIThe ONC Health IT Open Data API provides access to open datasets published by the Office of the National Co...42.5 TailorMed HL7 & FHIR Data ExchangeTailorMed's HL7 and FHIR integration program for keeping patient, prescription and program data in sync wit...41.8 Veradigm FHIR R4 APIThe Veradigm FHIR R4 API provides RESTful access to clinical, demographic, and facility data using the HL7 ...40.5 Veradigm Paragon Open APIThe Paragon Open API provides FHIR-compliant access to data from the Veradigm Paragon acute care EHR platfo...40.5 Veradigm Unity APIThe Veradigm Unity API exposes clinical, scheduling, demographic, and practice management functions across ...40.5 August Health APIRESTful v1 API for the August Health EHR platform covering organizations, facilities, rooms, census, reside...40.0

Thin 7 Limited public surface area

Yardi Senior Living EHR InterfaceVoyager Standard Interface for Yardi's Electronic Health Records platform for senior living communities, su...36.8 Netsmart CareConnect Provider Patient Access APIFHIR R4 API enabling patients and authorized applications to access clinical health records from Netsmart p...35.7 Updox Patient Management APICreate and update patient records and demographics that anchor reminders, forms, portal access, and convers...30.9 My Health Record FHIR Gateway (B2B)The business-to-business FHIR Gateway for connecting conformant clinical software to the My Health Record n...30.7 WellSky FHIR APIFHIR R4-compliant API built on the US Core Implementation Guide, providing read access to patient health da...28.0 openEHR EHR APIAdmin management of [EHRs](https://specifications.openehr.org/releases/RM/latest/ehr.html#_ehr_class).27.0 OSCAR REST Web Services APIOSCAR's REST web-services layer, served under the /ws/services base path of a deployed OSCAR instance, cove...26.4

Emerging 13 Early or largely undocumented

HL7 FHIRFast Healthcare Interoperability Resources (FHIR) is HL7's standard for health care data exchange. The curr...26.0 SMART on FHIRAn open-spec authorization profile layered on top of FHIR that enables third-party clinical applications to...26.0 Karaz APIEarly-stage REST API for the Karaz platform exposing Karaz App resources (e.g. gamification Badges) and Kar...25.3 Amwell EHR IntegrationAmwell's verified embedded-telehealth integration for Epic, delivered through the Epic App Orchard, and its...25.0 Telstra Health Smart API+FHIR-native integration gateway from Telstra Health that provides a single, standardized interface for appr...24.2 Interface Mechanism 1 (IM1)The NHS England national integration route by which approved third-party applications connect directly to G...23.3 SystmOne Client Integration APITPP's local client-integration interface allowing an approved third-party application to interact with a ru...23.3 mConsole EPD APImConsole is CODE24's modern EPD (electronic health record). CODE24 states that the record has a software in...21.3 Axxess All Data Request APICEHRT-certified API (§ 170.315(g)(9)) supporting CCDS C-CDA comprehensive data requests, allowing full pati...19.0 Axxess Data Category Request APICEHRT-certified API (§ 170.315(g)(8)) for categorical patient data retrieval, supporting structured data ac...19.0 Axxess Patient Selection APICEHRT-certified API (§ 170.315(g)(7)) for patient data selection, enabling authorized access to patient rec...19.0 Tempus EHR IntegrationTempus integrates genomic test ordering and results into clinical workflows using near real-time connection...15.8 Solv EHR Interoperability APIBidirectional interoperability layer that automatically syncs patient demographics, appointment details, an...12.4

Minimal 2 Almost no public developer surface

Quanum Data ExchangeQuanum Data Exchange is Quest's interoperability service for delivering laboratory and diagnostic results i...8.4 Visage 7 HL7 / FHIR Interoperability APIHL7 v2 messaging and FHIR-based interoperability for order/result and imaging-context exchange between Visa...7.0

Companies reaching this through an API (14)

These companies publish an API, specification or operation carrying “EHR” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Australian Digital Health Agency Cadasto Code24 EHRbase Google Cloud Healthcare HHS (US Department of Health and Human Services) Quest Diagnostics Solv Health TailorMed Tempus AI Updox Visage Imaging vitagroup Yardi

Score breakdown

Frequency

56.6

log-scaled weighted occurrences

Breadth

2.0

spread across providers

Quality lift

45.5

mean composite of providers using it

Cohesion

26.6

strength of nearest seed neighbor

Where this tag sits

Healthcare broader

Where this tag comes from

Provider tag78

Api tag41

Openapi tag2

Openapi op tag8

Cohort brief

Auto-generated

The 78 providers in the APIs.io catalog tagged EHR, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

all scored

Mean Kin Score

36.9

+14.0 vs catalog 22.9

Mean Agent Readiness

19.6

+7.7 vs catalog 11.9

Spread

2.6–77.5

median 36.3 · σ 19.5

How the 78 split by band

Exemplar 6Strong 11Developing 20Thin 13Emerging 21Minimal 7

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Access Clarity	42.3	26.5	+15.8	78
Developer Ergonomics	37.3	23.2	+14.1	78
Contract Quality	31	17.6	+13.4	78
Operational Transparency	24.2	13.7	+10.5	78
Discoverability	65.7	58.1	+7.6	78
Contract Governance	11.6	6.3	+5.3	78

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes

Artifact	This cohort	Catalog	Difference
MCP server (any)	10%	14%	-4
MCP server (first-party)	8%	12%	-4
Agent Skills	0%	0%	0
OAuth scopes	32%	11%	+21
Security	97%	98%	-1
Arazzo workflows	8%	2%	+6
Governance rules	17%	14%	+3

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score

1 Elation Health 77.5
2 drchrono 76.3
3 Vital 70.2
4 eClinicalWorks 69.7
5 athenahealth 69.1
6 NextGen Healthcare 66.7
7 Healthie 65.8
8 Amigo 64.3
9 Canvas Medical 62.5
10 Epic Systems 59.9

Work with this as data

Every tag 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 tags

7 MCP tools reach this

find_tagsBrowse and filter every tag in the catalog.
get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
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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This tag

curl "https://apis.io/api/v1/tags/ehr"

All tags

curl "https://apis.io/api/v1/tags?limit=25"

As a scored cohort

curl "https://apis.io/api/v1/cohorts/tag/ehr"

The distribution (Pro)

curl "https://apis.io/api/v1/cohorts/tag/ehr/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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EHR

Providers using this tag (78)

APIs with this tag (41)