Rubicon Project

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.

Rubicon Project publishes 3 APIs on the APIs.io network: SpringServe UI API (v1), SpringServe UI API (v0), and ClearLine API. Tagged areas include Company, Advertising, AdTech, Programmatic Advertising, and Sell-Side Platform.

Rubicon Project’s developer surface includes engineering blog, support, documentation, API reference, getting-started guide, legal docs, authentication, and 23 more developer resources.

50.5/100 developing ▬ flat Agent 63/100 agent ready Full breakdown ↓
scored 2026-08-17 · rubric v0.11.0
4 APIs 1 MCP Servers
CompanyAdvertisingAdTechProgrammatic AdvertisingSell-Side PlatformSSPReal-Time BiddingConnected TVAd ServingMediaOpenRTBReporting

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0
Composite quality — 50.5/100 · developing
Contract Quality 12.4 / 25
Developer Ergonomics 14.8 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 2.5 / 12
Discoverability 8.2 / 10
Agent readiness — 63/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/rubicon-project: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 4

Individual APIs this provider publishes, each with its own machine-readable definition.

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...

Open Collections 2

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

SpringServe UI API (V0)

OPEN COLLECTION

SpringServe UI API

OPEN COLLECTION

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Pricing Plans 1

Published pricing tiers and plan structures.

Rate Limits 1

Documented rate limits and quota policies.

Rubicon Project Rate Limits

3 limits

RATE LIMITS

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Rubicon Project Authentication

apiKey/http · 2 schemes

SECURITY

Rubicon Project Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Rubicon Project Trust Center

SOC 2 Type I, SOC 1 Type II

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Rubicon Project Agentic Access

668 operations · 349 acting · 1 human-in-the-loop

668 operations · 349 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Build 4

SDKs, sample code, and the tooling you integrate with

Access & Security 4

Authentication, authorization, and security posture

Operate 3

Status, limits, changes, and where to get help

Commercial 3

Pricing, plans, and the legal terms of use

Company 2

The organization behind the API

Source (apis.yml)

apis.yml Raw ↑
aid: rubicon-project
accessModel:
  pricing: unknown
  onboarding: partner
  trial: false
  try_now: false
  public: true
  label: Documented, account-gated
  confidence: medium
  source:
  - https://console.springserve.com/api-docs
  - https://springserve.atlassian.net/wiki/spaces/SSD/pages/1573617663/API+-+Getting+Started
  generated: '2026-08-12'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/rubicon-project.png
name: Rubicon Project
description: 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.
url: https://raw.githubusercontent.com/api-evangelist/rubicon-project/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- mayfield
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-08-12'
tags:
- Company
- Advertising
- AdTech
- Programmatic Advertising
- Sell-Side Platform
- SSP
- Real-Time Bidding
- Connected TV
- Ad Serving
- Media
- OpenRTB
- Reporting
apis:
- aid: rubicon-project-springserve-v1-api
  name: SpringServe UI API (v1)
  description: 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, supply routers, creatives (video, audio, tag, tile),
    deals and curated marketplaces, audiences and partner segments, targeting lists (domain, app bundle, app name, geo, ISP,
    postal code, city, state, country, metro area), header bidding platforms and bid maps, dashboards, reporting, report templates
    and scheduled reports, changelogs, notifications, permissions, users, accounts and billing. Published as OpenAPI 3.1.2
    and served anonymously from the SpringServe console's Swagger UI. Magnite is still building v1 parity with v0, so both
    versions are live and documented side by side.
  humanURL: https://springserve.atlassian.net/wiki/spaces/SSD/pages/1584726013/SpringServe+API+SDK
  baseURL: https://console.springserve.com/api/v1
  tags:
  - Ad Serving
  - Programmatic Advertising
  - Connected TV
  - Reporting
  - Targeting
  properties:
  - type: OpenAPI
    url: openapi/rubicon-project-springserve-v1-openapi.yml
  - type: Documentation
    url: https://springserve.atlassian.net/wiki/spaces/SSD/pages/1584726013/SpringServe+API+SDK
  - type: APIReference
    url: https://console.springserve.com/api-docs
  - type: GettingStarted
    url: https://springserve.atlassian.net/wiki/spaces/SSD/pages/1573617663/API+-+Getting+Started
  - type: Authentication
    url: authentication/rubicon-project-authentication.yml
  - type: RateLimits
    url: rate-limits/rubicon-project-rate-limits.yml
  - type: ErrorCatalog
    url: errors/rubicon-project-problem-types.yml
  - type: DataModel
    url: data-model/rubicon-project-data-model.yml
  - type: Overlay
    url: overlays/rubicon-project-springserve-v1-overlay.yaml
  - type: MCPServer
    url: mcp/rubicon-project-mcp.yml
  - type: Examples
    url: examples/rubicon-project-request-examples.yml
  - type: AgentSkill
    url: skills/_index.yml
- aid: rubicon-project-springserve-v0-api
  name: SpringServe UI API (v0)
  description: 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 paths covering campaigns, supply and demand tags, connected
    supply and connected demand, direct connections and clearing terms, segments and partner segments, creatives, bid maps,
    key-values, forecasting and reporting. Published as OpenAPI 3.1.2 and served anonymously from the SpringServe console's
    Swagger UI.
  humanURL: https://springserve.atlassian.net/wiki/spaces/SSD/pages/1584726013/SpringServe+API+SDK
  baseURL: https://console.springserve.com/api/v0
  tags:
  - Ad Serving
  - Programmatic Advertising
  - Reporting
  - Targeting
  properties:
  - type: OpenAPI
    url: openapi/rubicon-project-springserve-v0-openapi.yml
  - type: Documentation
    url: https://springserve.atlassian.net/wiki/spaces/SSD/pages/1584726013/SpringServe+API+SDK
  - type: APIReference
    url: https://console.springserve.com/api-docs
  - type: GettingStarted
    url: https://springserve.atlassian.net/wiki/spaces/SSD/pages/1573617663/API+-+Getting+Started
  - type: Overlay
    url: overlays/rubicon-project-springserve-v0-overlay.yaml
- aid: rubicon-project-clearline-api
  name: ClearLine API
  description: 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 contract from its own console host. The ClearLine documentation
    space documents the same v1/v0 endpoints under the ClearLine base URL, plus ClearLine-specific surfaces including budgets,
    bid modifiers, delivery modifiers, segment targeting and deals.
  humanURL: https://springserve.atlassian.net/wiki/spaces/CLD/pages/3649929217/Clearline+API+SDK
  baseURL: https://console.clearline.magnite.com/api/v1
  tags:
  - Advertising
  - Programmatic Advertising
  - Buy-Side
  - Reporting
  properties:
  - type: OpenAPI
    url: openapi/rubicon-project-springserve-v1-openapi.yml
  - type: Documentation
    url: https://springserve.atlassian.net/wiki/spaces/CLD/pages/3649929217/Clearline+API+SDK
  - type: APIReference
    url: https://console.clearline.magnite.com/api-docs
  - type: GettingStarted
    url: https://springserve.atlassian.net/wiki/spaces/CLD/pages/3649929246/CL+-API+-+Getting+Started
- aid: rubicon-project-openrtb-xapi
  name: Magnite Exchange API (xAPI) OpenRTB Extensions
  description: 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 (extension IDs in the 5100-5299 range) for the AdEngine
    bidding endpoint, including window/iframe geometry, key-value pairs and supply-chain signals used by demand partners bidding
    into the Magnite exchange.
  humanURL: https://github.com/MagniteEngineering/xapi-proto
  baseURL: https://github.com/MagniteEngineering/xapi-proto
  tags:
  - OpenRTB
  - Real-Time Bidding
  - Protobuf
  properties:
  - type: Protobuf
    url: grpc/rubicon-project-openrtb-xapi.proto
  - type: SourceCode
    url: https://github.com/MagniteEngineering/xapi-proto
common:
- type: AgenticAccess
  url: agentic-access/rubicon-project-agentic-access.yml
- type: Website
  url: https://www.magnite.com
- type: Blog
  url: https://www.magnite.com/blog/
- type: Support
  url: https://help.magnite.com/help
- type: HelpCenter
  url: https://help.magnite.com/help
- type: Documentation
  url: https://springserve.atlassian.net/wiki/spaces/SSD/pages/1584726013/SpringServe+API+SDK
- type: APIReference
  url: https://console.springserve.com/api-docs
- type: GettingStarted
  url: https://springserve.atlassian.net/wiki/spaces/SSD/pages/1573617663/API+-+Getting+Started
- type: GitHubOrganization
  url: https://github.com/MagniteEngineering
- type: Login
  url: https://console.springserve.com/
- type: TrustCenter
  url: security/rubicon-project-trust-center.yml
- type: Compliance
  url: https://www.magnite.com/trust-center/
- type: PrivacyPolicy
  url: https://www.magnite.com/legal/magnite-website-privacy-policy/
- type: Legal
  url: https://www.magnite.com/legal/
- type: DomainSecurity
  url: security/rubicon-project-domain-security.yml
- type: LLMsTxt
  url: llms/rubicon-project-llms.txt
- type: Packages
  url: packages/rubicon-project-packages.yml
- type: SDKs
  url: packages/rubicon-project-packages.yml
- type: Authentication
  url: authentication/rubicon-project-authentication.yml
- type: Conventions
  url: conventions/rubicon-project-conventions.yml
- type: RateLimits
  url: rate-limits/rubicon-project-rate-limits.yml
- type: Plans
  url: plans/rubicon-project-plans-pricing.yml
- type: ErrorCatalog
  url: errors/rubicon-project-problem-types.yml
- type: Lifecycle
  url: lifecycle/rubicon-project-lifecycle.yml
- type: Conformance
  url: conformance/rubicon-project-conformance.yml
- type: DataModel
  url: data-model/rubicon-project-data-model.yml
- type: MCPServer
  url: mcp/rubicon-project-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Examples
  url: examples/rubicon-project-request-examples.yml
- type: DeveloperPortal
  url: https://springserve.atlassian.net/wiki/spaces/SSD/overview
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-08-12'
  status: enriched
  artifacts_added: 9
  pass: local-v1