Citadel

Citadel (also branded Citadel Defense / Drone Citadel) is a counter-unmanned-aircraft-system (C-UAS) company founded in 2016 that built an automated, modular drone-defense solution using proprietary machine-learning algorithms to detect, classify, and defeat unauthorized drones. It raised a Lightspeed Venture Partners Series A in 2017 and was subsequently acquired by BlueHalo. The company operates no public developer portal, API, SDK, or documentation surface, and its standalone domains (citadeldefense.com, dronecitadel.com) are now parked or no longer resolve.

Citadel is profiled on the APIs.io network. Tagged areas include Company, Defense, Counter-UAS, Drones, and Machine Learning.

🌐 Visit website 📡 Source on GitHub

6.8/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyDefenseCounter-UASDronesMachine LearningSecurityHardware

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 6.8/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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

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Source (apis.yml)

aid: citadel
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/citadel.png
name: Citadel
description: Citadel (also branded Citadel Defense / Drone Citadel) is a counter-unmanned-aircraft-system (C-UAS) company
  founded in 2016 that built an automated, modular drone-defense solution using proprietary machine-learning algorithms to
  detect, classify, and defeat unauthorized drones. It raised a Lightspeed Venture Partners Series A in 2017 and was subsequently
  acquired by BlueHalo. The company operates no public developer portal, API, SDK, or documentation surface, and its standalone
  domains (citadeldefense.com, dronecitadel.com) are now parked or no longer resolve.
url: https://raw.githubusercontent.com/api-evangelist/citadel/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- lightspeed-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-acquired-by: bluehalo
x-enrichment-note: 'Enrichment pass 2026-07-18: counter-UAS defense hardware provider; no public API/developer surface exists.
  Standalone domains parked (citadeldefense.com) or unresolvable (dronecitadel.com). No artifacts producible without fabrication.'
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Defense
- Counter-UAS
- Drones
- Machine Learning
- Security
- Hardware
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence