Quantcast

Quantcast is a San Francisco-headquartered digital advertising and audience intelligence company founded in 2006. Its flagship offering is the Quantcast Platform, an AI-driven demand-side platform (DSP) for programmatic display, video, CTV, audio, mobile, and native advertising, powered by the company's proprietary Audience Graph and Ara AI engine. Quantcast also operates Quantcast Measure, a free audience measurement product that has tagged millions of digital properties to produce demographic, psychographic, and cross-device audience insights. For programmatic access, Quantcast exposes a developer portal at developers.quantcast.com built around a GraphQL API (v2) for reporting, campaign management, and audience operations on the Quantcast Platform, secured via OAuth 2.0 client credentials. A server-to-server Conversion API augments the browser-side Live Tag for offline and signal-loss-resilient conversion tracking. Quantcast Choice, the company's IAB TCF v2-compliant Consent Management Platform, was acquired by InMobi in August 2023 and is now operated as part of InMobi CMP; legacy Quantcast Choice mobile SDKs remain published under the quantcast GitHub organization for reference. Quantcast also open-sources the Quantcast File System (QFS), a C++ distributed file system, and mobile/Roku measurement SDKs.

Quantcast publishes 1 API on the APIs.io network: Platform GraphQL API. Tagged areas include Advertising, AdTech, Programmatic Advertising, Demand-Side Platform, and DSP.

Quantcast’s developer surface includes documentation, API reference, getting-started guide, support, authentication, engineering blog, signup flow, and 39 more developer resources.

🌐 Visit website 📡 Source on GitHub

41.1/100 developing ▬ flat Agent 21/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

3 APIs

Advertising AdTech Programmatic Advertising Demand-Side Platform DSP Audience Measurement Audience Intelligence Consent Management CMP Privacy GraphQL Conversion Tracking CTV Video Advertising Display Advertising Artificial IntelligenceAudience Graph

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 41.1/100 · developing

Contract Quality 1.3 / 25

Developer Ergonomics 16.1 / 20

Access Clarity 6.8 / 20

Operational Transparency 6.5 / 13

Contract Governance 2.2 / 12

Discoverability 8.2 / 10

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 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

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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APIs 3

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

Quantcast Platform GraphQL API

The Quantcast Platform GraphQL API (v2) is the primary programmatic interface to the Quantcast advertising platform. It exposes queries and mutations for reporting, campaign and...

Quantcast Conversion API

The Quantcast Conversion API is a server-to-server integration that augments the browser-side Quantcast Live Tag. It accepts a JSON array of conversion events containing a conve...

Quantcast Measure (Live Tag)

Quantcast Measure is the company's free audience measurement product. Publishers and advertisers integrate the Quantcast Live Tag (Q Pixel) on web properties, or the Measure SDK...

GraphQL 1

GraphQL schemas published by this provider.

Quantcast GraphQL API

Pricing Plans 1

Published pricing tiers and plan structures.

Quantcast Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Quantcast Rate Limits

5 limits

RATE LIMITS

Security Posture 2

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

Quantcast Authentication

oauth2/http/apiKey · 3 schemes

SECURITY

Quantcast Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Quantcast Scopes

2 scopes · clientCredentials

2 scopes

SCOPES

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Components

Build 5

SDKs, sample code, and the tooling you integrate with

Postman

Postman

GitHub

GitHub

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 4

Authentication, authorization, and security posture

DomainSecurity

Authentication

Authentication

OAuthScopes

Learn 1

Tutorials, courses, talks, and written guidance

YouTube

YouTube

Operate 5

Status, limits, changes, and where to get help

HelpCenter

Support

Contact

StatusPage

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Privacy

PrivacyPolicy

TermsOfService

Plans

Company 6

The organization behind the API

Website

Press

Blog

Careers

LinkedIn

Twitter

Twitter

Other 5

Properties that don't map to a standard resource type

Platform

Measure

Developers

Company

Acquisition

Source (apis.yml)

aid: quantcast
name: Quantcast
description: Quantcast is a San Francisco-headquartered digital advertising and audience intelligence company founded in 2006.
  Its flagship offering is the Quantcast Platform, an AI-driven demand-side platform (DSP) for programmatic display, video,
  CTV, audio, mobile, and native advertising, powered by the company's proprietary Audience Graph and Ara AI engine. Quantcast
  also operates Quantcast Measure, a free audience measurement product that has tagged millions of digital properties to produce
  demographic, psychographic, and cross-device audience insights. For programmatic access, Quantcast exposes a developer portal
  at developers.quantcast.com built around a GraphQL API (v2) for reporting, campaign management, and audience operations
  on the Quantcast Platform, secured via OAuth 2.0 client credentials. A server-to-server Conversion API augments the browser-side
  Live Tag for offline and signal-loss-resilient conversion tracking. Quantcast Choice, the company's IAB TCF v2-compliant
  Consent Management Platform, was acquired by InMobi in August 2023 and is now operated as part of InMobi CMP; legacy Quantcast
  Choice mobile SDKs remain published under the quantcast GitHub organization for reference. Quantcast also open-sources the
  Quantcast File System (QFS), a C++ distributed file system, and mobile/Roku measurement SDKs.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
position: Producing
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/quantcast.png
tags:
- Advertising
- AdTech
- Programmatic Advertising
- Demand-Side Platform
- DSP
- Audience Measurement
- Audience Intelligence
- Consent Management
- CMP
- Privacy
- GraphQL
- Conversion Tracking
- CTV
- Video Advertising
- Display Advertising
- Artificial Intelligence
- Audience Graph
url: https://raw.githubusercontent.com/api-evangelist/quantcast/refs/heads/main/apis.yml
created: '2026-05-25'
modified: '2026-08-13'
specificationVersion: '0.23'
apis:
- aid: quantcast:quantcast-platform-graphql-api
  name: Quantcast Platform GraphQL API
  description: The Quantcast Platform GraphQL API (v2) is the primary programmatic interface to the Quantcast advertising
    platform. It exposes queries and mutations for reporting, campaign and line item management, audience operations, and
    account administration. Authentication uses OAuth 2.0 client credentials issued from the Quantcast Platform profile settings;
    tokens are short-lived (1 hour) and passed as bearer tokens. Rate limits are enforced per token. The full schema (queries,
    mutations, objects, enums, input objects, scalars) is documented on the developer portal but is not published as a downloadable
    OpenAPI or GraphQL SDL artifact.
  humanURL: https://developers.quantcast.com/docs/graphql-api
  baseURL: https://developers.quantcast.com/api/v2/graphql
  tags:
  - GraphQL
  - Reporting
  - Campaigns
  - Advertising
  properties:
  - type: Documentation
    url: https://developers.quantcast.com/docs/graphql-api
  - type: Authentication
    url: https://developers.quantcast.com/docs/get-started/authentication/
  - type: Usage
    url: https://developers.quantcast.com/docs/graphql-api/usage/
  - type: Reference
    url: https://developers.quantcast.com/docs/graphql-api/reference/
  - type: RateLimits
    url: https://developers.quantcast.com/docs/graphql-api/usage/rate-limits/
  - type: TokenEndpoint
    url: https://auth.quantcast.com/oauth2/default/v1/token
  - url: graphql/quantcast-graphql.md
    type: GraphQL
  - type: Postman
    url: https://developers.quantcast.com/docs/QuantcastDeveloperAPI.postman_collection.json
    name: Quantcast Developer API Postman collection
  - type: Recipes
    url: https://developers.quantcast.com/docs/graphql-api/usage/recipes/
- aid: quantcast:quantcast-conversion-api
  name: Quantcast Conversion API
  description: The Quantcast Conversion API is a server-to-server integration that augments the browser-side Quantcast Live
    Tag. It accepts a JSON array of conversion events containing a conversion descriptor, a user object (browser token or
    user agent plus IP, optional hashed email, optional external ID), and an event object (labels, order ID, revenue, product
    category). It is designed to capture offline conversions, delayed sales, and conversions that occur outside of the browser,
    and to provide signal resiliency in cookie-restricted environments. The account ID is passed as the `a` query parameter.
  humanURL: https://help.quantcast.com/docs/tagging-with-the-quantcast-live-tag-using-the-conversion-api
  baseURL: https://pixel.quantserve.com/conversion
  tags:
  - Conversion
  - Server-to-Server
  - Tagging
  - Measurements
  tags_raw:
  - Conversion
  - Server-to-Server
  - Tagging
  - Measurement
  properties:
  - type: Documentation
    url: https://help.quantcast.com/docs/tagging-with-the-quantcast-live-tag-using-the-conversion-api
  - type: LiveTag
    url: https://help.quantcast.com/docs/tagging-with-the-quantcast-live-tag
- aid: quantcast:quantcast-measure-tag
  name: Quantcast Measure (Live Tag)
  description: Quantcast Measure is the company's free audience measurement product. Publishers and advertisers integrate
    the Quantcast Live Tag (Q Pixel) on web properties, or the Measure SDKs on iOS, Android, and Roku, to contribute traffic
    to Quantcast's audience graph and receive demographic, psychographic, and cross-device audience insights through the Quantcast
    Measure UI.
  humanURL: https://help.quantcast.com/docs/measure
  baseURL: https://pixel.quantserve.com
  tags:
  - Measurements
  - Tagging
  - Audience Insights
  - SDK
  tags_raw:
  - Measurement
  - Tagging
  - Audience Insights
  - SDK
  properties:
  - type: Documentation
    url: https://help.quantcast.com/docs/measure
  - type: LiveTag
    url: https://help.quantcast.com/docs/tagging-with-the-quantcast-live-tag
  - type: SDKs
    url: https://github.com/quantcast/ios-measurement
  - type: SDKs
    url: https://github.com/quantcast/android-measurement
  - type: SDKs
    url: https://github.com/quantcast/roku-measurement
  - type: SDKs
    url: https://github.com/quantcast/phonegap-measurement
  - type: Integrations
    url: https://github.com/quantcast/gtm-measure-sst
common:
- type: DomainSecurity
  url: security/quantcast-domain-security.yml
- type: Website
  url: https://www.quantcast.com
- type: Platform
  url: https://www.quantcast.com/platform/
- type: Measure
  url: https://www.quantcast.com/measure/
- type: Developers
  url: https://developers.quantcast.com/docs/
- type: DeveloperPortal
  url: https://developers.quantcast.com/docs/
- type: Documentation
  url: https://developers.quantcast.com/docs/graphql-api
- type: APIReference
  url: https://developers.quantcast.com/docs/graphql-api/reference/
- type: GettingStarted
  url: https://developers.quantcast.com/docs/get-started/
- type: Postman
  url: https://developers.quantcast.com/docs/QuantcastDeveloperAPI.postman_collection.json
  name: Quantcast Developer API Postman collection
- type: HelpCenter
  url: https://help.quantcast.com
- type: Support
  url: https://help.quantcast.com
- type: Authentication
  url: https://developers.quantcast.com/docs/get-started/authentication/
- type: Company
  url: https://www.quantcast.com/about-us/
- type: Press
  url: https://www.quantcast.com/press/
- type: Blog
  url: https://www.quantcast.com/resources/blog/
- type: Careers
  url: https://www.quantcast.com/careers/
- type: Contact
  url: https://www.quantcast.com/contact-us/
- type: SignUp
  url: https://www.quantcast.com/signup/
- type: Login
  url: https://www.quantcast.com/login/
- type: Privacy
  url: https://www.quantcast.com/privacy/
- type: PrivacyPolicy
  url: https://www.quantcast.com/privacy/
- type: TermsOfService
  url: https://legal.quantcast.com/
  name: Quantcast Legal Center — Measure and Publisher Terms of Service, Buyer Terms, data privacy addenda
- type: StatusPage
  url: https://status.quantcast.com
- type: GitHub
  url: https://github.com/quantcast
- type: GitHubOrganization
  url: https://github.com/quantcast
- type: LinkedIn
  url: https://www.linkedin.com/company/quantcast
- type: Twitter
  url: https://twitter.com/quantcast
- type: YouTube
  url: https://www.youtube.com/user/Quantcast
- type: Acquisition
  url: https://www.quantcast.com/press-release/inmobi-acquires-quantcast-choice-to-enhance-frictionless-consent-management-for-publishers/
- type: Packages
  url: packages/quantcast-packages.yml
- type: SDKs
  url: packages/quantcast-packages.yml
  name: Quantcast client libraries and SDKs
- type: WellKnown
  url: well-known/quantcast-well-known.yml
- type: Authentication
  url: authentication/quantcast-authentication.yml
  name: Quantcast authentication profile
- type: OAuthScopes
  url: scopes/quantcast-scopes.yml
- type: RateLimits
  url: rate-limits/quantcast-rate-limits.yml
- type: Plans
  url: plans/quantcast-plans-pricing.yml
- type: Conventions
  url: conventions/quantcast-conventions.yml
- type: ErrorCatalog
  url: errors/quantcast-problem-types.yml
- type: Lifecycle
  url: lifecycle/quantcast-lifecycle.yml
- type: Conformance
  url: conformance/quantcast-conformance.yml
- type: DataModel
  url: data-model/quantcast-data-model.yml
- type: Components
  url: components/quantcast-components.yml
- type: X-MCPServerCandidate
  url: mcp/quantcast-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
  name: Quantcast MCP candidate manifest (no server published)
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/quantcast-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 20
  pass: local-v1

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