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-productions.s3.amazonaws.com/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
  - 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: [email protected]