# Horizon Media

> 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. It runs a proprietary data and AI stack anchored by the Blu platform, and in 2025 formed Horizon Global, a 50/50 US joint venture with Havas. Horizon markets Blu audience APIs and MCP-based integration points to qualified partners, but publishes no public developer portal, no API reference and no machine-readable contract. This file is generated by API Evangelist from the catalog profile — Horizon Media does not serve an llms.txt of its own (https://www.horizonmedia.com/llms.txt returns 404).

## Status

- API surface: partner-gated. No OpenAPI, AsyncAPI, GraphQL SDL, MCP manifest or agent card is published on any resolving Horizon Media host.
- Access route: the corporate contact form at https://www.horizonmedia.com/interested. There is no self-serve sign-up, developer portal or pricing page.
- GitHub: github.com/HorizonMedia exists but publishes zero public repositories.
- Verified hosts: www.horizonmedia.com and trust.horizonmedia.com. developer/api/docs/blu/partners subdomains do not resolve.

## Platforms

- [Blu](https://www.horizonmedia.com/innovation): Horizon's connected marketing and AI platform. Organizes data in a flat lattice for AI access, runs inside each client's own cloud and data walls, taps multiple LLMs, and uses TransUnion data as an identity spine. Exposes Blu audience APIs and MCP integration points to qualified partners.
- [Horizon OS (Open Sphere)](https://www.horizonmedia.com/innovation): ad-tech orchestration layer above the programmatic stack, routing spend across DSPs, SSPs, verification, data and measurement partners on real-time performance signals.
- [BluConverged](https://www.horizonmedia.com/innovation): the joint Horizon Blu + Havas Converged platform powering the Horizon Global JV.
- [Cogent](https://www.horizonmedia.com/innovation): proprietary data and intelligence platform brand.
- [Big](https://www.horizonmedia.com/innovation): proprietary creative platform brand.
- [Wave](https://www.horizonmedia.com/innovation): cultural insights platform, associated with the WHY Group practice.

## Divisions

- Horizon Next — performance marketing.
- Blue Hour Studios — social content and creator economy.
- Night Market — retail media.
- Horizon Sports & Experiences (HS&E) and Scout Sports & Entertainment — sponsorship and sports marketing.
- WHY Group — strategy and cultural intelligence; publisher of the Subculture Field Guide.

## Trust and compliance

- [Trust Center](https://trust.horizonmedia.com/): SOC 2 Type 2, ISO/IEC 27001:2022, ISO/IEC 27701:2019, ISO/IEC 42001:2023, HITRUST, HIPAA. Auditor: Schellman.
- No responsible-disclosure policy, security contact or security.txt is published.

## Corporate

- [Website](https://www.horizonmedia.com/)
- [Insights](https://www.horizonmedia.com/insights)
- [Innovation](https://www.horizonmedia.com/innovation)
- [Contact](https://www.horizonmedia.com/interested)
- [Privacy Policy](https://www.horizonmedia.com/privacy-policy)
- [Terms of Use](https://www.horizonmedia.com/terms-of-use)
- [LinkedIn](https://www.linkedin.com/company/horizon-media)

## API Evangelist artifacts

- [apis.yml](https://raw.githubusercontent.com/api-evangelist/horizon-media/refs/heads/main/apis.yml)
- [Well-known probe](https://raw.githubusercontent.com/api-evangelist/horizon-media/refs/heads/main/well-known/horizon-media-well-known.yml)
- [Conformance](https://raw.githubusercontent.com/api-evangelist/horizon-media/refs/heads/main/conformance/horizon-media-conformance.yml)
- [Trust center](https://raw.githubusercontent.com/api-evangelist/horizon-media/refs/heads/main/security/horizon-media-trust-center.yml)
- [Domain security](https://raw.githubusercontent.com/api-evangelist/horizon-media/refs/heads/main/security/horizon-media-domain-security.yml)
- [Packages](https://raw.githubusercontent.com/api-evangelist/horizon-media/refs/heads/main/packages/horizon-media-packages.yml)
- [Plans](https://raw.githubusercontent.com/api-evangelist/horizon-media/refs/heads/main/plans/horizon-media-plans-pricing.yml)
- [Rate limits](https://raw.githubusercontent.com/api-evangelist/horizon-media/refs/heads/main/rate-limits/horizon-media-rate-limits.yml)