Whisper Aero

Whisper Aero is a Crossville, Tennessee based aerospace company developing ultra-quiet electric ducted-fan propulsion that converts electricity into thrust with roughly 20 percent more efficiency and 20 dB less noise than conventional systems, scaling from 5 to 500 pounds of thrust and 40 to 400 knots for aviation, defense, and commercial applications. Backed by Kindred Ventures, Lux Capital, and Menlo Ventures. The company is a hardware manufacturer and, as of this enrichment pass, publishes no public developer API, portal, or documentation surface.

Whisper Aero is profiled on the APIs.io network. Tagged areas include Company, Mobility Logistics, Aerospace, Electric Propulsion, and Aviation.

Whisper Aero’s developer surface includes engineering blog and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub

9.7/100 minimal ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

CompanyMobility LogisticsAerospace Electric Propulsion Aviation Defense Manufacturing Cleantech

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 9.7/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.5 / 20

Access Clarity 4.2 / 20

Operational Transparency 0.0 / 13

Contract Governance 0.0 / 12

Discoverability 5.0 / 10

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

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.

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 github.com/api-evangelist/whisper-aero: open an issue to ask a question, or submit a pull request to add artifacts. 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.

Whisper Aero Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: whisper-aero
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/whisper-aero.png
name: Whisper Aero
description: Whisper Aero is a Crossville, Tennessee based aerospace company developing ultra-quiet electric ducted-fan propulsion
  that converts electricity into thrust with roughly 20 percent more efficiency and 20 dB less noise than conventional systems,
  scaling from 5 to 500 pounds of thrust and 40 to 400 knots for aviation, defense, and commercial applications. Backed by
  Kindred Ventures, Lux Capital, and Menlo Ventures. The company is a hardware manufacturer and, as of this enrichment pass,
  publishes no public developer API, portal, or documentation surface.
url: https://raw.githubusercontent.com/api-evangelist/whisper-aero/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- kindred-ventures
- lux-capital
- menlo-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Mobility Logistics
- Aerospace
- Electric Propulsion
- Aviation
- Defense
- Manufacturing
- Cleantech
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/whisper-aero-domain-security.yml
- type: Website
  url: https://www.whisper.aero/
- type: Blog
  url: https://www.whisper.aero/news
- type: PrivacyPolicy
  url: https://www.whisper.aero/legal/privacy-policy
- type: TermsOfService
  url: https://www.whisper.aero/legal/terms-and-conditions
x-enrichment:
  date: '2026-07-21'
  status: minimal
  artifacts_added: 1
  pass: local-v1

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