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Rubicon Project
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.
4 APIs
1 MCP Servers
Company Advertising AdTech Programmatic Advertising Sell-Side Platform SSP Real-Time Bidding Connected TV Ad Serving Media OpenRTB Reporting
On this page
Kin Score
APIs 4
Open Collections 2
MCP Servers 1
Pricing Plans 1
Rate Limits 1
Security Posture 3
Agentic Access 1
Resources 30
apis.yml
37 Operational Transparency
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
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
Individual APIs this provider publishes, each with its own machine-readable definition.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Model Context Protocol servers that expose these APIs to AI agents.
Published pricing tiers and plan structures.
Documented rate limits and quota policies.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Recommended x-agentic-access execution contracts for AI agents.
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)
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