aid: apieron
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/apieron.png
name: Apieron
description: 'Apieron Inc. was a private, venture-backed medical device company headquartered in Menlo
  Park, California, formed in early 2001 to develop a simple-to-use, non-invasive monitor for the
  measurement of exhaled nitric oxide (eNO) as an aid in the management of asthma. Its patented
  biosensor platform enabled highly sensitive detection of selected analytes, and its Insight eNO
  System received U.S. Food and Drug Administration clearance and launched in the United States in
  2008. Following that launch Aerocrine filed patent-infringement complaints against Apieron and
  Apieron counterclaimed; citing the legal setbacks and a lack of financing, Apieron filed a Chapter 7
  bankruptcy petition in the U.S. Bankruptcy Court for the Northern District of California on 30 March
  2010. At a court auction on 12 May 2010 Aerocrine acquired all of Apieron''s business assets,
  including its patent and trademark portfolio, ending the litigation; the Insight product was
  discontinued and not returned to supply. Apieron was a clinical-hardware company and never published
  a public API, developer portal, SDK, or machine-readable interface. This profile is retained as a
  historical record of the Canaan Partners portfolio and is not an active API provider.'
url: https://raw.githubusercontent.com/api-evangelist/apieron/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- canaan-partners
x-tier: historical
x-tier-reason: defunct-2010-no-api-surface
x-status: defunct
x-status-detail: Filed Chapter 7 bankruptcy 30 March 2010 (N.D. Cal.); all business assets, patents,
  and trademarks acquired by Aerocrine AB at a bankruptcy auction on 12 May 2010. The Insight eNO
  System was discontinued and not returned to supply.
x-acquired-by: Aerocrine AB
x-acquired-year: 2010
x-acquisition-type: bankruptcy-asset-sale
x-acquisition-source: https://www.globenewswire.com/news-release/2010/04/07/230395/0/en/Aerocrine-provides-update-on-its-legal-action-against-Apieron.html
x-acquirer-successor: 'Aerocrine AB was itself acquired by Circassia Pharmaceuticals plc in June 2015;
  Circassia Group plc rebranded to NIOX Group plc in 2022. aerocrine.com no longer resolves (probed
  2026-07-19); the successor surface is https://www.niox.com/.'
x-founded-year: 2001
x-headquarters: Menlo Park, California, United States
x-sector: Medical Devices
x-total-funding: $62.6 million
x-other-investors:
- Draper Fisher Jurvetson
- ONSET Ventures
- Technology Alliance Ventures
x-domain-status:
  domain: apieron.com
  probed: '2026-07-19'
  result: parked-for-sale
  note: 'apieron.com resolves and returns HTTP 200, but 307-redirects to a GoDaddy aftermarket
    for-sale lander. Every probed path returns the identical lander body: /.well-known/security.txt,
    /.well-known/openid-configuration, /.well-known/oauth-authorization-server,
    /.well-known/api-catalog and /.well-known/ai-plugin.json all byte-match the response for a
    randomly generated nonexistent path (md5 e89f75f918dbdcee28604d4e09dd71d7), so those 200 status
    codes are wildcard false positives and no well-known artifacts were saved. A /llms.txt is served
    but describes the GoDaddy domain listing rather than the company, and was likewise not saved.'
x-enrichment:
  date: '2026-07-19'
  status: nochange
  artifacts_added: 0
  pass: local-v1
  rationale: 'Searched and probed successfully. Entity is defunct (Chapter 7 in 2010; assets absorbed
    by Aerocrine) and published no API, developer portal, SDK, or specification during its operating
    life. Its former domain is now a GoDaddy for-sale parking page whose wildcard 200s were rejected
    as false positives. No artifacts were generated; fabricating any would be unfaithful.'
x-disambiguation:
- name: Apeiron
  url: https://apeiron.io/
  relationship: unrelated-name-collision
  note: 'Apeiron (note the different spelling: "Apeiron", not "Apieron") is a present-day
    communications platform publishing voice/SIP trunking, SMS/MMS, phone number, E911 and cellular
    MVNE APIs with Postman collections at https://apeiron.io/docs. It is a separate company and is not
    the Canaan Partners portfolio company profiled here; its API surface must not be attributed to
    Apieron Inc.'
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Medical Devices
- Healthcare
- Respiratory
- Asthma
- Diagnostics
- Biosensors
- Acquired
- Historical
apis: []
common:
- type: Acquirer
  name: Aerocrine AB (now NIOX Group plc)
  url: https://www.niox.com/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io