---
title: "/2026-01/marketing-solutions/audiences/compute-sizes"
method: POST
path: "/2026-01/marketing-solutions/audiences/compute-sizes"
tags: ["Audience"]
---

# /2026-01/marketing-solutions/audiences/compute-sizes

`POST /2026-01/marketing-solutions/audiences/compute-sizes`

Gets the size of all audiences. An error is returned for those whose size calculation is not supported.

## Request body

- AudienceComputeSizesInputV1 — Input to retrieve the size of one or more audiences.
  - `data` AudienceComputeSizeEntityV1Resource[]
    - `attributes` AudienceComputeSizeEntityV1 — Audience of people of interest for a marketer.
    - `id` string — Id of the entity
    - `type` string

## Response `200`

Success or partial success

- AudienceSizeEntityV1ListResponse — A top-level object that encapsulates a Criteo API response for several entities
  - `data` AudienceSizeEntityV1Resource[], nullable
    - `attributes` AudienceSizeEntityV1, nullable — Audience entity only with its size
      - `size` integer, nullable
    - `id` string, nullable — Id of the entity
    - `type` string, nullable
  - `errors` CommonProblem[], nullable
    - `code` string, nullable — A machine-readable error code, expressed as a string value.
    - `detail` string, nullable — A human-readable explanation specific to this occurrence of the problem
    - `instance` string, nullable — A URI that identifies the specific occurrence of the problem.
    - `source` object, nullable — A machine-readable structure to reference to the exact location(s) causing the error(s)
    - `stackTrace` string, nullable
    - `title` string, nullable — A short human-readable description of the problem type
    - `traceId` string, nullable — The request correlation ID this problem comes from.
    - `traceIdentifier` string, nullable — The request correlation ID this problem comes from. (deprecated, use traceId instead)
    - `type` 'unknown' | 'access-control' | 'authentication' | 'authorization' | 'availability' | 'deprecation' | 'quota' | 'validation', nullable — The problem's category.
  - `warnings` CommonProblem[], nullable
    - `code` string, nullable — A machine-readable error code, expressed as a string value.
    - `detail` string, nullable — A human-readable explanation specific to this occurrence of the problem
    - `instance` string, nullable — A URI that identifies the specific occurrence of the problem.
    - `source` object, nullable — A machine-readable structure to reference to the exact location(s) causing the error(s)
    - `stackTrace` string, nullable
    - `title` string, nullable — A short human-readable description of the problem type
    - `traceId` string, nullable — The request correlation ID this problem comes from.
    - `traceIdentifier` string, nullable — The request correlation ID this problem comes from. (deprecated, use traceId instead)
    - `type` 'unknown' | 'access-control' | 'authentication' | 'authorization' | 'availability' | 'deprecation' | 'quota' | 'validation', nullable — The problem's category.

---

[API](https://skmtc.net/criteo/apis/criteo-api.md) · [All operations](https://skmtc.net/criteo/apis/criteo-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/criteo/criteo-api/revisions/c1721589426a/schema)