# Rubicon Project

**Canonical:** https://apis.io/providers/rubicon-project/  
**Website:** https://www.magnite.com  
**APIs profiled:** 4

Rubicon Project is a Los Angeles-based advertising technology company, founded in 2007, that built and operated one of the largest real-time bidding advertising exchanges, connecting digital publishers (the sell side) with advertisers and demand-side platforms. In 2020 Rubicon Project merged with Telaria and rebranded as Magnite, now positioned as the world's largest independent sell-side (SSP) advertising company, spanning connected TV (CTV), online video, display, and audio across its DV+, SpringServe, ClearLine and Magnite Streaming platforms. This profile tracks the company as it exists today under the Magnite brand. Magnite publishes a public, machine-readable OpenAPI 3.1 contract for the SpringServe ad-serving platform (v1 and v0) at console.springserve.com/api-docs, mirrored for the ClearLine buy-side console at console.clearline.magnite.com, together with a public Confluence documentation space, published rate limits, a first-party Python SDK, mobile In-App Ads SDKs for iOS and Android, and OpenRTB protobuf extensions. Account creation and API credentials remain partner-gated; the contract itself is anonymously readable.

## Kin Score — 50.5 / 100 (developing)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 50.5).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 49.7 |
| Governance | 20.8 |
| Operational Transparency | 36.8 |
| Developer Ergonomics | 73.9 |
| Commercial Clarity | 39.5 |

## Agent readiness — 63.1 (agent-ready)

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

## Access

Documented, account-gated — onboarding: unknown, pricing: unknown, trial: no (confidence: medium).

## APIs (4)

- **SpringServe UI API (v1)** — The v1 REST API for SpringServe, Magnite's ad-serving and CTV/streaming ad-server platform. 379 operations across 295 paths and 53 tags, covering supply tags, demand tags, suppl...
- **SpringServe UI API (v0)** — The original v0 REST API for SpringServe, still fully supported and documented alongside v1 while Magnite builds v1 equivalents for every endpoint. 289 operations across 173 pat...
- **ClearLine API** — ClearLine is Magnite's direct buy-side activation platform for advertisers and agencies, running on the same SpringServe codebase and serving the identical OpenAPI 3.1.2 contrac...
- **Magnite Exchange API (xAPI) OpenRTB Extensions** — Magnite's Exchange API (xAPI) protobuf extensions to the IAB OpenRTB 2.x protobuf definitions, published in the open on GitHub. Defines Magnite-specific OpenRTB extension fields...

## MCP servers (1)

- **rubicon-project-mcp.yml**

## Agentic access (1)

- **Rubicon Project Agentic Access** — 668 operations · 349 acting · 1 human-in-the-loop

## Security (3)

- **Rubicon Project Authentication** — apiKey/http · 2 schemes
- **Rubicon Project Domain Security** — TLSv1.3 · HSTS · DMARC
- **Rubicon Project Trust Center** — SOC 2 Type I, SOC 1 Type II

## Plans (1)

- **Rubicon Project Plans Pricing**

## Tags

Company, Advertising, AdTech, Programmatic Advertising, Sell-Side Platform, SSP, Real-Time Bidding, Connected TV, Ad Serving, Media, OpenRTB, Reporting

---

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