MediaMath Audience Segments API
Audience Segments API (DMP v2.0) for onboarding and activating first- and third-party audience data in the MediaMath Platform. Manages global and permissioned taxonomies, external data segments (data pixels), segment permissioning to organizations/agencies/advertisers, and data-vendor revenue share at the taxonomy level. Deprecated as of 1 August 2026 in favour of the V3 Campaign Management API.
MediaMath Audience Segments API is one of 46 APIs that MediaMath publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include Audience, Segments, Taxonomy, Data Onboarding, and DMP. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, authentication docs, and rate-limit docs.
This API exposes 5 operations across 3 paths. It is described by OpenAPI 3.0.0, at version 2.0.
Requests are made against a single base URL, https://api.mediamath.com/dmp/v2.0.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 2
MediaMath Audience Segments API declares
2 security schemes
for authenticating requests.
It supports OAuth 2.0 (OAuth2) using the password flow.
An API key is passed in the header as Cookie (Cookie_Auth).
By default, every request must be authenticated.
Cookie_Auth— Cookie: adamasesion=cookie-id. Security: API Key - Please note that adamacookie support is being deprecated and will be removed in our future v2 API.
Paths & Operations 5
Across 3 paths, the API surfaces 5 operations — 3 GET, 2 POST. Each is listed below with its method, path, parameters, and response codes.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from MediaMath 12
Other APIs MediaMath publishes across the network.
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