# Citadel

**Canonical:** https://apis.io/providers/citadel/  
**APIs profiled:** 0

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.

## Kin Score — 5.0 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 5.0).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Tags

Company, Defense, Counter-UAS, Drones, Machine-Learning, Security, Hardware

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/citadel/). Scores are computed from the provider's own public artifacts under a published rubric.