# Horizon Media

**Canonical:** https://apis.io/providers/horizon-media/  
**Website:** https://www.horizonmedia.com/  
**APIs profiled:** 0

Horizon Media is the largest independent media agency in the United States, founded in 1989 by Bill Koenigsberg and headquartered at 75 Varick Street in New York with offices in Los Angeles and Toronto. The agency employs roughly 2,300+ people, is ranked the third largest US media agency by COMvergence, and manages an estimated $8.7 billion in billings. Horizon operates a portfolio of specialty units (Horizon Next for performance, Blue Hour Studios for social/creator, Night Market for retail media, Scout Sports for sponsorship via Horizon Sports & Experiences, and the WHY Group for cultural insights) and runs a proprietary data and AI stack anchored by the Blu platform. In 2025 Horizon formed Horizon Global, a 50/50 US joint venture with Havas positioned at roughly $20 billion in combined billings, merging Blu with Havas Converged into a shared platform branded BluConverged, and is also building Horizon OS (Open Sphere) as an orchestration layer over the programmatic ad-tech stack. In June 2026 Horizon launched an agentic integration layer around Blu — a set of Blu audience APIs, MCP endpoints and agent-based integration points that ad-tech, media-owner and martech partners can build on — but that surface is partner-gated: Horizon publishes no developer portal, no API reference, no OpenAPI or other machine-readable contract, no SDKs in any public registry, and its GitHub organization has zero public repositories. The only route to the API is the corporate contact form. All platforms documented here are proprietary systems reachable through a commercial partnership rather than open developer APIs.

## Kin Score — 15.3 / 100 (emerging)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 15.3).

| Facet | Score |
|---|---|
| Discoverability | 57.4 |
| Contract Quality | 0.0 |
| Governance | 12.5 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 36.8 |

## Agent readiness — 3.2 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| 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).

## Security (2)

- **Horizon Media Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Horizon Media Trust Center** — SOC 2 Type 2, ISO/IEC 27001:2022, ISO/IEC 27701:2019, ISO/IEC 42001:2023, HITRUST, HIPAA

## Plans (1)

- **Horizon Media Plans Pricing**

## Tags

Advertising, Media Agency, Media Planning, Media Buying, Programmatic, Retail Media, Sports Marketing, Social Media, Influencer Marketing, Cultural Intelligence, Data Platform, AI Platform, MarTech, AdTech, Independent Agency

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