Kno2
Kno2 provides Interoperability as a Service for healthcare - a single Communication API to SEND, RECEIVE, and FIND patient information across the healthcare ecosystem. One connection reaches Direct Secure Messaging, clinical document exchange, HL7 FHIR resources, HL7 V2.x, cloud fax, and national record location and retrieval through Kno2's private network, Carequality, eHealth Exchange, and TEFCA (Kno2 is a federally designated QHIN). API access is partner/enterprise gated - integrators are provisioned a per-subscription tenant host with OAuth2 client-credentials keys and an IP allowlist; a staging sandbox is available through the Kno2 Developer Program.
Kno2 publishes 7 API contracts indexed on the APIs.io network, including Attachments API, Authentication API, Directory API, and 4 more. Tagged areas include Interoperability, Clinical Records, Health Information Exchange, Direct Secure Messaging, and FHIR.
The Kno2 catalog on APIs.io includes 1 Spectral governance ruleset.
Kno2’s developer surface includes authentication, documentation, API reference, support, engineering blog, signup flow, and 33 more developer resources.
What this lets a business do 1
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
Kin Score
Standards implemented 2
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.
APIs 7
Individual APIs this provider publishes, each with its own machine-readable definition.
Kno2 FHIR API
HL7 FHIR (DSTU3/R4) resource query and retrieval at scale, including USCDI data classes and patient demographic search, brokered through Kno2's gateway to Carequality and nation...
Kno2 Patient Record Query API
On-demand patient record location and retrieval across national networks - Kno2's private network, Carequality, eHealth Exchange, and TEFCA (Kno2 is a designated QHIN). Find a p...
Kno2 Attachments API
Upload, retrieve, and mark clinical document attachments.
Kno2 Authentication API
OAuth2 client-credentials token issuance.
Kno2 Directory API
Validate Direct addresses and list document types.
Kno2 Intake API
RECEIVE surface - search, retrieve, and process inbound messages.
Kno2 Messaging API
SEND surface - draft, populate, attach, and send messages.
Scroll for all 7
Open Collections 6
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Kno2 Communication Attachments API
OPEN COLLECTIONKno2 Communication Attachments Authentication API
OPEN COLLECTIONKno2 Communication Attachments Directory API
OPEN COLLECTIONKno2 Communication Attachments Intake API
OPEN COLLECTIONKno2 Communication Attachments Messaging API
OPEN COLLECTIONKno2 Communication API
OPEN COLLECTIONAgent Skills 2
Packaged agent skills for driving this provider's APIs from an AI assistant.
Process an inbound Kno2 message
AGENT SKILLKno2 API pricing
Not yet checked against Kno2's own pricing page. Compiled by API Evangelist on 2026-08-14 from kno2.com/; confirm before you rely on a figure. A free plan or tier is listed.
| Plan | Price |
|---|---|
| Developer Program (Sandbox) free | — |
| Communication API Subscription enterprise | — |
Plan details, limits and sources →
Rate limits
- Communication API Requests: not published requests
- Intake Polling: client-paced (~10s interval in reference client) requests
- IP Allowlist: allowlisted only source ip
Compiled by API Evangelist, not yet checked against Kno2's documentation. Rate-limit details →
Pricing Plans 1
Published pricing tiers and plan structures.
Kno2 Plans Pricing
PLANSRate Limits 1
Documented rate limits and quota policies.
Kno2 Rate Limits
RATE LIMITSTerms of Service 1
What its API terms permit and prohibit, quoted from its own page.
Privacy & Data 1
Its role, the data it processes, retention and transfers, quoted from its own privacy page.
Eligibility 1
Who may sign up and where, quoted from its own terms.
FinOps 1
Cost, billing, and metering signals for API financial operations.
Kno2 Finops
FINOPSSpectral Rules 1
Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.
Kno2 API Rules
SPECTRALOpenAPI Overlays 5
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.
Kno2 Attachments Api Overlay
DERIVEDKno2 Authentication Api Overlay
DERIVEDKno2 Directory Api Overlay
DERIVEDKno2 Intake Api Overlay
DERIVEDKno2 Messaging Api Overlay
DERIVEDSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access (API Evangelist recommendations) 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 2
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 5
Pagination, idempotency, versioning, errors, and events
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 6
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 8
Properties that don't map to a standard resource type
Scroll for all 8
Source (apis.yml)
Kno2 API — frequently asked questions
Does Kno2 have an API?
Yes. APIs.io lists 7 APIs from Kno2, including Kno2 FHIR API, Kno2 Patient Record Query API and Kno2 Attachments API, and 4 more.
Is there an OpenAPI specification for the Kno2 API?
Yes. APIs.io indexes 5 OpenAPI specifications for Kno2, each linked for download from this page.
How do I authenticate with the Kno2 API?
Kno2 uses bearer-token authentication (http · 2 schemes). The details are profiled on APIs.io as Kno2 Authentication.
How much does the Kno2 API cost?
APIs.io lists 2 pricing plans for Kno2, with each plan's price, limits and inclusions under Pricing on this page.
Is the Kno2 API ready for AI agents?
Kno2 has a Kin Score of 36.7 out of 100 (thin) and an Agent Readiness score of 24.6 (agent-aware), scored by API Evangelist on 2026-11-13.
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.