Quantcast

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
position: Provider
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
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: '2026-05-25'
specificationVersion: '0.20'
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
- 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
  - 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
  tags:
  - 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: SDK
    url: https://github.com/quantcast/ios-measurement
  - type: SDK
    url: https://github.com/quantcast/android-measurement
  - type: SDK
    url: https://github.com/quantcast/roku-measurement
  - type: SDK
    url: https://github.com/quantcast/phonegap-measurement
  - type: Integration
    url: https://github.com/quantcast/gtm-measure-sst
common:
- 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
- type: Documentation
  url: https://developers.quantcast.com/docs/graphql-api
- type: HelpCenter
  url: https://help.quantcast.com
- type: Authentication
  url: https://developers.quantcast.com/docs/get-started/authentication/
- type: Company
  url: https://www.quantcast.com/company/
- type: Press
  url: https://www.quantcast.com/press/
- type: Blog
  url: https://www.quantcast.com/blog/
- type: Careers
  url: https://www.quantcast.com/careers/
- type: Contact
  url: https://www.quantcast.com/contact/
- type: Privacy
  url: https://www.quantcast.com/privacy/
- type: GitHub
  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/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com