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 is listed with 3 APIs on the APIs.io network, including Platform GraphQL API, and 2 more. Tagged areas include Advertising, AdTech, Programmatic Advertising, DSP, and Audience Measurement.
Quantcast’s developer surface includes documentation, API reference, getting-started guide, support, authentication, engineering blog, signup flow, and 39 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Horizontal (data, software, accessibility, platform) regime, so
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because the conditional facet above carries the other
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Agent readiness — checks not met, largest first (exact, from this profile):
Idempotency+9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card+8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples+7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
7 more unmet checks in the Agent Readiness table above.
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Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
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...
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 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...
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