Zunum Aero

Zunum Aero is an American aerospace company founded in 2013 and based in the Seattle area (Kirkland / Bothell, Washington) that set out to build hybrid-to-electric regional aircraft. Its ZA10 program targeted a six-to-twelve-seat hybrid-electric airplane with a 700-nautical-mile range, aimed at reviving short-haul point-to-point air travel from secondary airports, and it was backed by Boeing HorizonX and JetBlue Technology Ventures. The company laid off nearly all of its staff in late 2018 and paused operations, and it later pursued trade-secret litigation against Boeing. Zunum Aero is an aircraft manufacturer, not a software vendor: its public web presence is a marketing and press site with no developer program, no developer portal, no documentation, and no published machine-readable API contract of any kind.

Zunum Aero is profiled on the APIs.io network. Tagged areas include Company, Aerospace, Aviation, Aircraft Manufacturing, and Electric Aviation.

Zunum Aero’s developer surface includes engineering blog and 6 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

4.6/100 minimal ▬ flat Agent 0/100 human only Front door AI 1/6 silent Heartbeat 0/100 dormant Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

0 APIs

Company Aerospace Aviation Aircraft Manufacturing Electric AviationHybrid-Electric PropulsionRegional Air TravelTransportation Hardware Startups

Kin Score

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

Composite quality — 4.6/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.7 / 9

Regulatory Posture 0.9 / 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 Horizontal (data, software, accessibility, platform) 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
Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 2.4 — up to +19.5 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/zunum-aero/apis.yml: open an issue on github.com/api-evangelist/zunum-aero 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 →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Zunum Aero Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 4

The organization behind the API

Website

Website

Blog

Blog

BlogRSS

BlogRSS

LinkedIn

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: zunum-aero
name: Zunum Aero
description: 'Zunum Aero is an American aerospace company founded in 2013 and based in the Seattle area (Kirkland / Bothell,
  Washington) that set out to build hybrid-to-electric regional aircraft. Its ZA10 program targeted a six-to-twelve-seat hybrid-electric
  airplane with a 700-nautical-mile range, aimed at reviving short-haul point-to-point air travel from secondary airports,
  and it was backed by Boeing HorizonX and JetBlue Technology Ventures. The company laid off nearly all of its staff in late
  2018 and paused operations, and it later pursued trade-secret litigation against Boeing. Zunum Aero is an aircraft manufacturer,
  not a software vendor: its public web presence is a marketing and press site with no developer program, no developer portal,
  no documentation, and no published machine-readable API contract of any kind.'
url: https://raw.githubusercontent.com/api-evangelist/zunum-aero/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: none
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://zunum.aero/wp-content/uploads/2017/03/zunum-aero-logo.png
x-type: company
x-source: harvest:secondary-market
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.20'
created: '2026-09-05'
modified: '2026-09-05'
tags:
- Company
- Aerospace
- Aviation
- Aircraft Manufacturing
- Electric Aviation
- Hybrid-Electric Propulsion
- Regional Air Travel
- Transportation
- Hardware
- Startups
tags_raw:
- Company
- Aerospace
- Aviation
- Aircraft Manufacturing
- Electric Aviation
- Hybrid Electric Propulsion
- Regional Air Travel
- Transportation
- Hardware
- Startups
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://zunum.aero/
- type: Blog
  url: https://zunum.aero/in-the-news/
- type: BlogRSS
  url: https://zunum.aero/feed/
- type: LinkedIn
  url: https://www.linkedin.com/company/3679319/
- type: X
  url: https://twitter.com/zunumaero
- type: DomainSecurity
  url: security/zunum-aero-domain-security.yml
- type: LLMsTxt
  url: llms/zunum-aero-llms.txt
x-enrichment:
  date: '2026-09-05'
  status: minimal
  artifacts_added: 3
  pass: local-v3
x-coverage:
  state: none
  reason: not-a-software-company
  detail: Zunum Aero builds hybrid-electric regional aircraft; zunum.aero is a WordPress marketing and press site whose only
    machine-readable surfaces are the stock WordPress CMS endpoint at /wp-json and an RSS feed, and every developer-facing
    path probed (/openapi.json, /swagger.json, /api-docs, /docs, /graphql, /llms.txt and the /.well-known/ set) returns 404.
  evidence:
  - url: https://zunum.aero/
    status: 200
  - url: https://zunum.aero/openapi.json
    status: 404
  - url: https://zunum.aero/.well-known/security.txt
    status: 404
  - url: https://zunum.aero/llms.txt
    status: 404
  - url: https://zunum.aero/docs
    status: 404
  checked: '2026-09-05'

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