Apieron

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.

Apieron is profiled on the APIs.io network. Tagged areas include Company, Medical Devices, Healthcare, Respiratory, and Asthma.

📡 Profile data on GitHub

0.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

0 APIs

Company Medical Devices Healthcare Respiratory Asthma Diagnostics Biosensors Acquired Historical Defunct

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 0.0/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 0.0 / 9

Regulatory Posture 0.0 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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 3 / 3

MCP Tool Quality 6 / 6

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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

13 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 0.0 — up to +20.0 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/apieron/apis.yml: open an issue on github.com/api-evangelist/apieron 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 →

Resources

Other 1

Properties that don't map to a standard resource type

Acquirer

Acquirer

Source (apis.yml)

aid: apieron
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-11-06'
  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: '0.23'
created: '2026-07-17'
modified: '2026-09-15'
tags:
- Company
- Medical Devices
- Healthcare
- Respiratory
- Asthma
- Diagnostics
- Biosensors
- Acquired
- Historical
- Defunct
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

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