aid: kno2
url: https://raw.githubusercontent.com/api-evangelist/kno2/refs/heads/main/apis.yml
name: Kno2
kind: company
description: 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.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Healthcare Interoperability
- Clinical Records
- Health Information Exchange
- Direct Secure Messaging
- FHIR
- Clinical Documents
- Patient Records
- Healthcare
- HIE
- Care Coordination
- QHIN
- TEFCA
- Carequality
created: '2026-07-12'
modified: '2026-07-12'
specificationVersion: '0.19'
apis:
- aid: kno2:kno2-messaging-api
  name: Kno2 Messaging API
  tags:
  - Direct Secure Messaging
  - Document Exchange
  - Send
  - Attachments
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.kno2.com
  baseURL: https://{subscription}.kno2fy.com
  properties:
  - url: https://kno2.com/api/
    type: Documentation
  - url: https://developer.kno2.com
    type: APIReference
  - url: https://github.com/Kno2/Kno2.ApiTestClient
    type: SourceCode
  - url: openapi/kno2-openapi.yml
    type: OpenAPI
  - url: collections/kno2.postman_collection.json
    type: PostmanCollection
  - url: collections/kno2.opencollection.json
    type: OpenCollection
  description: The core SEND surface. Request a draft message, populate it with the
    patient, recipient Direct address, document type, and metadata, attach one or
    more clinical documents (CCDA, PDF, images, HL7), then send it as Direct Secure
    Messaging or document exchange. Confirmed endpoints under api/messages derived
    from Kno2's official ApiTestClient. Base host is per-integrator subscription.
- aid: kno2:kno2-intake-api
  name: Kno2 Intake and Retrieval API
  tags:
  - Receive
  - Find
  - Intake
  - Clinical Documents
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.kno2.com
  baseURL: https://{subscription}.kno2fy.com
  properties:
  - url: https://kno2.com/api/
    type: Documentation
  - url: https://github.com/Kno2/Kno2.ApiTestClient
    type: SourceCode
  - url: openapi/kno2-openapi.yml
    type: OpenAPI
  - url: collections/kno2.postman_collection.json
    type: PostmanCollection
  - url: collections/kno2.opencollection.json
    type: OpenCollection
  description: The RECEIVE surface. Search the intake queue for inbound/processed
    messages awaiting EMR export, retrieve a message and its attachment metadata
    and content, mark attachments read, and process messages. Confirmed endpoints
    under api/messages (search, process, attachment read) derived from Kno2's
    official ApiTestClient.
- aid: kno2:kno2-directory-api
  name: Kno2 Directory API
  tags:
  - Directory
  - Address Validation
  - Document Types
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.kno2.com
  baseURL: https://{subscription}.kno2fy.com
  properties:
  - url: https://kno2.com/api/
    type: Documentation
  - url: https://github.com/Kno2/Kno2.ApiTestClient
    type: SourceCode
  - url: openapi/kno2-openapi.yml
    type: OpenAPI
  description: Validate Direct Secure Messaging addresses and endpoints before
    sending, and list the document types available to the current subscription.
    Confirmed endpoints api/directory/validate and api/documenttypes derived from
    Kno2's official ApiTestClient. Kno2 also markets broader national provider and
    organization directory search (endpoint paths not publicly confirmed).
- aid: kno2:kno2-fhir-api
  name: Kno2 FHIR API
  tags:
  - FHIR
  - USCDI
  - Clinical Records
  - Patient Facing
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://kno2.com/connectivity/
  baseURL: https://{subscription}.kno2fy.com
  properties:
  - url: https://kno2.com/wp-content/uploads/2022/09/Kno2-Connectivity-FHIR-2.1.pdf
    type: Documentation
  description: 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 national FHIR endpoints. MODELED - Kno2 documents
    FHIR as a product capability of the Communication API but the FHIR base URL and
    resource paths are partner-provisioned and not publicly documented.
- aid: kno2:kno2-record-query-api
  name: Kno2 Patient Record Query API
  tags:
  - Health Information Exchange
  - QHIN
  - TEFCA
  - Carequality
  - Care Coordination
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://kno2.com/networks/
  baseURL: https://{subscription}.kno2fy.com
  properties:
  - url: https://kno2.com/api/
    type: Documentation
  description: 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 patient, query participating organizations,
    and retrieve complete records on demand. MODELED - a documented product
    capability of the Communication API; the specific query/retrieve endpoint paths
    are partner-provisioned and not publicly documented.
common:
- type: AgenticAccess
  url: agentic-access/kno2-agentic-access.yml
- type: DomainSecurity
  url: security/kno2-domain-security.yml
- type: Authentication
  url: authentication/kno2-authentication.yml
- type: GitHubOrganization
  url: https://github.com/Kno2
- type: LinkedIn
  url: https://www.linkedin.com/company/kno2
- type: Website
  url: https://kno2.com
- type: Documentation
  url: https://developer.kno2.com
- type: Plans
  url: plans/kno2-plans-pricing.yml
- type: RateLimits
  url: rate-limits/kno2-rate-limits.yml
- type: FinOps
  url: finops/kno2-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com