Introduction

Commerce Max Retailer Billed introduces a buying model in which campaign budgets are funded by the retailer rather than the advertiser.

This guide covers the API changes required for third-party buying platforms to create and manage retailer-billed Sponsored Products campaigns end-to-end.

Business Context

Prior to this release, the Retail Media API did not expose retailer scoping on balances, campaigns, or line items. Retailer-billed buying requires platforms to associate balances, campaigns, and line items to the same retailer — the API now enforces these constraints explicitly.

Prerequisites

API version 2026-01 or later is required to see retailer-billed balances. On prior versions, retailer-billed balances are hidden by default to prevent integration surprises during rollout.
Platforms must use the supply account ID when querying balances if they wish to discover retailer-billed balances.

Key Concepts

Retailer-billed balance — a budget object funded by the retailer, scoped to a specific RetailerId. Cannot be created via API; must be retrieved via GET /balances.
RetailerId — the identifier of the retailer that funds the balance and scopes the campaign. Must be consistent across balance → campaign → line item.
budgetModel — a new field on the retailer search response indicating which budget models (e.g., retailerBilled, capped, uncapped) are supported at a given retailer.

Backward compatibility for balance endpoints:

The poNumber field on balance responses is removed in 2026-01 and replaced by two separate fields: retailerPoNumber and criteoPoNumber. This is a breaking change for consumers of GET /balances on prior versions who rely on poNumber.
All other new fields (retailerId, privateMarketBillingType) are additive. Retailer-billed balances are hidden by default on prior API versions.

Endpoints Overview

All endpoints changes related to Retailer Billed are also documented in the following pages:

Verb	Endpoint	Description
GET	`/retail-media/balances/{balanceId}`	Get a single balance. Now includes`retailerId`,`retailerPoNumber`,`criteoPoNumber`.
GET	`/retail-media/accounts/{accountId}/balances`	List balances. Now includes retailer fields. Retailer-billed balances hidden on prior versions.
GET	`/retail-media/balances/{balanceId}/history`	Get balance change history. Now includes`retailerPoNumber`,`criteoPoNumber`.
POST	`/retail-media/balances/{balanceId}/campaigns/append`	Add campaigns to a balance. Validates retailer consistency.
POST	`/retail-media/balances/{balanceId}/campaigns/delete`	Remove campaigns from a balance. Returns error for retailer-billed balances.
POST	`/retail-media/accounts/{accountId}/campaigns`	Create a campaign. Now accepts and validates`retailerId`.
GET	`/retail-media/campaigns`	List campaigns. Now returns`retailerId`; supports filtering by retailer.
GET	`/retail-media/campaigns/{campaignId}`	Get a campaign. Now returns`retailerId`.
POST	`/retail-media/campaigns/{campaignId}/auction-line-items`	Create a line item. Enforces`targetRetailerId`matches campaign retailer.
POST	`/retail-media/accounts/{accountId}/retailers/search`	Search retailers. Now returns`budgetModel`in`campaignAvailabilities`.

Attributes

New and Changed Fields on Balances

Attribute	Data Type	Mutable	Description
`retailerId`	`string?`	init	Retailer this balance is scoped to. Present only on retailer-billed balances. Nullable? Y (null for non-retailer-billed)
`retailerPoNumber`	`string?`	always	Retailer purchase order number.Replacesthe removed`poNumber`field. Nullable? Y
`criteoPoNumber`	`string?`	always	Criteo purchase order number. Replacesthe removed`poNumber`field. Nullable? Y
`privateMarketBillingType`	`enum`	init	Billing type for Private Market. Values:`NotApplicable`,`BillByRetailer`,`BillByCriteo`,`Unknown`
~~`poNumber`~~	~~string~~	—	Removedin`2026-01`. Replaced by`retailerPoNumber`and`criteoPoNumber`.

New Field on Campaigns

A new field RetailerId has been added to the following endpoints:

/accounts/{accountId}/campaigns
/campaigns/{campaignId}

Attribute	Data Type	Description
`RetailerId`	`string`	The retailer this campaign is associated with. Required when using a retailer-billed balance. Writeable?Y (at create) Nullable?Y (for non-retailer-billed campaigns)

Attribute

Data Type

Description

RetailerId

string

The retailer this campaign is associated with.

Required when using a retailer-billed balance.

Writeable?Y (at create)

Nullable?Y (for non-retailer-billed campaigns)

New Fields on Retailer Search

The new fields are added to the following endpoint:

/accounts/{accountId}/retailers/search

Attribute	Data Type	Description
`budgetModel`	`string`	Budget model(s) supported for the given`buyType`/`campaignType`combination at this retailer. Values:`capped`,`uncapped`,`retailerBilled`. Writeable?N Nullable?N

Attribute

Data Type

Description

budgetModel

string

Budget model(s) supported for the givenbuyType/campaignTypecombination at this retailer.

Values:capped,uncapped,retailerBilled.

Writeable?N

Nullable?N

New Error Codes

Error code	Endpoint	Meaning
`RetailerBilledBalanceImmutable`	`DELETE /balances/{balanceId}/campaigns`	Cannot remove a retailer-billed balance from a campaign.
`RetailerMismatchWithBalance`	`POST /accounts/{accountId}/campaigns`	Campaign`RetailerId`does not match the balance’s`RetailerId`.
`RetailerMismatchWithCampaign`	`POST /campaigns/{campaignId}/auction-line-items`	Line item`targetRetailerId`does not match the campaign’s`RetailerId`.

Endpoint Changes

Get List of Balances for an Account

This endpoint returns a paginated list of balances for an account. On API version 2026-01 and later, retailer-billed balances are included and retailerId, retailerPoNumber, and criteoPoNumber are returned. The old poNumber field is removed.

Query parameters

offset (int, default 0),
limit (int, default 25, max 500),
limitToId (List<string>)

Sample Request

curl -L -X GET 'https://api.criteo.com/2026-01/retail-media/accounts/625702934721171442/balances' \
-H 'Accept: application/json' \
-H 'Authorization: Bearer <MY_ACCESS_TOKEN>'

import http.client

conn = http.client.HTTPSConnection("api.criteo.com")
headers = {'Accept': 'application/json', 'Authorization': 'Bearer &lt;TOKEN&gt;'}
conn.request("GET", "/2026-01/retail-media/accounts/625702934721171442/balances", headers=headers)
res = conn.getresponse()
print(res.read().decode("utf-8"))

OkHttpClient client = new OkHttpClient().newBuilder().build();
Request request = new Request.Builder()
  .url("https://api.criteo.com/2026-01/retail-media/accounts/625702934721171442/balances")
  .method("GET", null)
  .addHeader("Accept", "application/json")
  .addHeader("Authorization", "Bearer &lt;TOKEN&gt;")
  .build();
Response response = client.newCall(request).execute();

<?php
require_once 'HTTP/Request2.php';
$request = new HTTP_Request2();
$request->setUrl('https://api.criteo.com/2026-01/retail-media/accounts/625702934721171442/balances');
$request->setMethod(HTTP_Request2::METHOD_GET);
$request->setHeader(array('Accept' => 'application/json', 'Authorization' => 'Bearer &lt;TOKEN&gt;'));
echo $request->send()->getBody();

Sample Response

{
  "meta": { "count": 2, "offset": 0, "limit": 25 },
  "data": [
    {
      "id": "814283465675018240",
      "type": "Balance",
      "attributes": {
        "name": "Retailer Billed Q2 Budget",
        "retailerId": "1298",
        "retailerPoNumber": "A-5678",
        "criteoPoNumber": null,
        "memo": "Q2 retailer-billed campaign",
        "deposited": 2000.00,
        "spent": 0.00,
        "remaining": 2000.00,
        "startDate": "2026-07-01",
        "endDate": "2026-12-31",
        "status": "active",
        "balanceType": "capped",
        "spendType": "Onsite",
        "privateMarketBillingType": "billByRetailer",
        "createdAt": "2026-02-24T23:51:46+00:00",
        "updatedAt": "2026-02-24T23:51:48+00:00"
      }
    },
    {
      "id": "814313002113232896",
      "type": "Balance",
      "attributes": {
        "name": "Standard Advertiser Balance",
        "retailerId": null,
        "retailerPoNumber": null,
        "criteoPoNumber": "A-1234",
        "deposited": 2000.00,
        "spent": 0.00,
        "remaining": 2000.00,
        "startDate": "2026-07-01",
        "endDate": "2026-12-31",
        "status": "active",
        "balanceType": "capped",
        "spendType": "Onsite",
        "privateMarketBillingType": "billByCriteo",
        "createdAt": "2026-02-25T01:49:08+00:00",
        "updatedAt": "2026-02-25T01:49:10+00:00"
      }
    }
  ],
  "warnings": [],
  "errors": []
}

Add Campaigns to a Balance

This endpoint adds one or more campaigns to a balance. It validates that campaigns are retailer-native when the balance is retailer-billed. Sample Request

curl -L -X POST 'https://api.criteo.com/2026-01/retail-media/balances/814886589256347648/campaigns/append' \
-H 'Content-Type: application/json' \
-H 'Accept: application/json' \
-H 'Authorization: Bearer <MY_ACCESS_TOKEN>' \
-d '{
  "data": {
    "attributes": {
      "ids": ["718038552188952576", "234105251251242423"]
    },
    "type": "AppendCampaignsRequest"
  }
}'

Sample Response

{
  "data": {
    "attributes": {
      "ids": ["718038552188952576", "234105251251242423"]
    },
    "type": "BalanceCampaigns"
  },
  "warnings": [],
  "errors": []
}

Sample Response — Error (non-retailer-native campaign)

{
  "errors": [
    {
      "message": "Only retailer-sold campaigns are allowed to be mapped to a retailer-billed balance.",
      "status": 400
    }
  ]
}

Remove Campaign(s) from a Balance

This endpoint removes one or more campaigns from a balance. Sample Request

curl -L -X POST 'https://api.criteo.com/2026-01/retail-media/balances/814886589256347648/campaigns/delete' \
-H 'Content-Type: application/json' \
-H 'Accept: application/json' \
-H 'Authorization: Bearer <MY_ACCESS_TOKEN>' \
-d '{
  "data": {
    "attributes": {
      "ids": ["234105251251242423"]
    },
    "type": "DeleteCampaignsRequest"
  }
}'

Sample Response

{
  "data": {
    "attributes": {
      "ids": ["718038552188952576"]
    },
    "type": "BalanceCampaigns"
  },
  "warnings": [],
  "errors": []
}

Create New Campaigns

This endpoint creates a new campaign.

For retailer-billed campaigns, retailerId is required and must match the retailerId on the drawable balance.

Sample Request

curl -L -X POST 'https://api.criteo.com/2026-01/retail-media/accounts/625702934721171442/campaigns' \
-H 'Content-Type: application/json' \
-H 'Accept: application/json' \
-H 'Authorization: Bearer <MY_ACCESS_TOKEN>' \
-d '{
  "data": {
    "type": "Campaign",
    "attributes": {
      "name": "Retailer Billed Campaign Q2",
      "startDate": "2026-07-01T00:00:00+00:00",
      "clickAttributionWindow": "30D",
      "viewAttributionWindow": "None",
      "retailerId": "1298",
      "drawableBalanceIds": ["814886589256347648"]
    }
  }
}'

import http.client
import json
conn = http.client.HTTPSConnection("api.criteo.com")
payload = json.dumps({
  "data": {
    "type": "Campaign",
    "attributes": {
      "name": "Retailer Billed Campaign Q2",
      "startDate": "2026-07-01T00:00:00+00:00",
      "clickAttributionWindow": "30D",
      "viewAttributionWindow": "None",
      "retailerId": "1298",
      "drawableBalanceIds": ["814886589256347648"]
    }
  }
})
headers = {'Content-Type': 'application/json', 'Accept': 'application/json', 'Authorization': 'Bearer &lt;TOKEN&gt;'}
conn.request("POST", "/2026-01/retail-media/accounts/625702934721171442/campaigns", payload, headers)
print(conn.getresponse().read().decode("utf-8"))

OkHttpClient client = new OkHttpClient().newBuilder().build();
MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, "{\"data\":{\"type\":\"Campaign\",\"attributes\":{\"name\":\"Retailer Billed Campaign Q2\",\"startDate\":\"2026-07-01T00:00:00+00:00\",\"clickAttributionWindow\":\"30D\",\"viewAttributionWindow\":\"None\",\"retailerId\":\"1298\",\"drawableBalanceIds\":[\"814886589256347648\"]}}}");
Request request = new Request.Builder()
  .url("https://api.criteo.com/2026-01/retail-media/accounts/625702934721171442/campaigns")
  .method("POST", body)
  .addHeader("Content-Type", "application/json")
  .addHeader("Accept", "application/json")
  .addHeader("Authorization", "Bearer &lt;TOKEN&gt;")
  .build();
Response response = client.newCall(request).execute();

<?php
require_once 'HTTP/Request2.php';
$request = new HTTP_Request2();
$request->setUrl('https://api.criteo.com/2026-01/retail-media/accounts/625702934721171442/campaigns');
$request->setMethod(HTTP_Request2::METHOD_POST);
$request->setHeader(array('Content-Type' => 'application/json', 'Accept' => 'application/json', 'Authorization' => 'Bearer &lt;TOKEN&gt;'));
$request->setBody('{"data":{"type":"Campaign","attributes":{"name":"Retailer Billed Campaign Q2","startDate":"2026-07-01T00:00:00+00:00","clickAttributionWindow":"30D","viewAttributionWindow":"None","retailerId":"1298","drawableBalanceIds":["814886589256347648"]}}}');
echo $request->send()->getBody();

Sample Response

{
  "data": {
    "id": "718038552188952576",
    "type": "Campaign",
    "attributes": {
      "name": "Retailer Billed Campaign Q2",
      "accountId": "625702934721171442",
      "type": "auction",
      "status": "inactive",
      "retailerId": "1298",
      "drawableBalanceIds": ["814886589256347648"],
      "budget": null,
      "budgetSpent": 0.0,
      "budgetRemaining": null,
      "startDate": "2026-07-01T00:00:00+00:00",
      "endDate": null,
      "clickAttributionWindow": "30D",
      "viewAttributionWindow": "None",
      "createdAt": "2026-05-08T00:00:00+00:00",
      "updatedAt": "2026-05-08T00:00:00+00:00"
    }
  }
}

Get Campaigns by Account ID and Campaign ID

Both endpoints now return retailerId in the campaign attributes. The list endpoint supports filtering by retailerId. Sample Request — Get a Single Campaign

curl -L -X GET 'https://api.criteo.com/2026-01/retail-media/campaigns/718038552188952576' \
-H 'Accept: application/json' \
-H 'Authorization: Bearer <MY_ACCESS_TOKEN>'

Sample Response

{
  "data": {
    "id": "718038552188952576",
    "type": "Campaign",
    "attributes": {
      "name": "Retailer Billed Campaign Q2",
      "accountId": "625702934721171442",
      "type": "auction",
      "status": "active",
      "retailerId": "1298",
      "drawableBalanceIds": ["814886589256347648"],
      "budget": null,
      "budgetSpent": 1250.00,
      "budgetRemaining": null,
      "startDate": "2026-07-01T00:00:00+00:00",
      "endDate": null,
      "clickAttributionWindow": "30D",
      "viewAttributionWindow": "None",
      "createdAt": "2026-05-08T00:00:00+00:00",
      "updatedAt": "2026-07-01T00:00:00+00:00"
    }
  }
}

Create an Auction Line Item

Creates an auction line item. For retailer-billed campaigns, targetRetailerId is required and must match the campaign’s retailerId. Only one retailer is allowed per retailer-billed campaign. Sample Request

curl -L -X POST 'https://api.criteo.com/2026-01/retail-media/campaigns/718038552188952576/auction-line-items' \
-H 'Content-Type: application/json' \
-H 'Accept: application/json' \
-H 'Authorization: Bearer <MY_ACCESS_TOKEN>' \
-d '{
  "data": {
    "type": "SponsoredProductsLineItem",
    "attributes": {
      "name": "Retailer Billed Line Item",
      "targetRetailerId": "1298",
      "startDate": "2026-07-01",
      "bidStrategy": "automated",
      "optimizationStrategy": "conversion",
      "keywordStrategy": "genericAndBranded"
    }
  }
}'

import http.client
import json

conn = http.client.HTTPSConnection("api.criteo.com")
payload = json.dumps({
  "data": {
    "type": "SponsoredProductsLineItem",
    "attributes": {
      "name": "Retailer Billed Line Item",
      "targetRetailerId": "1298",
      "startDate": "2026-07-01",
      "bidStrategy": "automated",
      "optimizationStrategy": "conversion",
      "keywordStrategy": "genericAndBranded"
    }
  }
})
headers = {'Content-Type': 'application/json', 'Accept': 'application/json', 'Authorization': 'Bearer &lt;TOKEN&gt;'}
conn.request("POST", "/2026-01/retail-media/campaigns/718038552188952576/auction-line-items", payload, headers)
print(conn.getresponse().read().decode("utf-8"))

OkHttpClient client = new OkHttpClient().newBuilder().build();
MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, "{\"data\":{\"type\":\"SponsoredProductsLineItem\",\"attributes\":{\"name\":\"Retailer Billed Line Item\",\"targetRetailerId\":\"1298\",\"startDate\":\"2026-07-01\",\"bidStrategy\":\"automated\",\"optimizationStrategy\":\"conversion\",\"keywordStrategy\":\"genericAndBranded\"}}}");
Request request = new Request.Builder()
  .url("https://api.criteo.com/2026-01/retail-media/campaigns/718038552188952576/auction-line-items")
  .method("POST", body)
  .addHeader("Content-Type", "application/json")
  .addHeader("Accept", "application/json")
  .addHeader("Authorization", "Bearer &lt;TOKEN&gt;")
  .build();
Response response = client.newCall(request).execute();

<?php
require_once 'HTTP/Request2.php';
$request = new HTTP_Request2();
$request->setUrl('https://api.criteo.com/2026-01/retail-media/campaigns/718038552188952576/auction-line-items');
$request->setMethod(HTTP_Request2::METHOD_POST);
$request->setHeader(array('Content-Type' => 'application/json', 'Accept' => 'application/json', 'Authorization' => 'Bearer &lt;TOKEN&gt;'));
$request->setBody('{"data":{"type":"SponsoredProductsLineItem","attributes":{"name":"Retailer Billed Line Item","targetRetailerId":"1298","startDate":"2026-07-01","bidStrategy":"automated","optimizationStrategy":"conversion","keywordStrategy":"genericAndBranded"}}}');
echo $request->send()->getBody();

Sample Response

{
  "data": {
    "id": "234105251251242423",
    "type": "SponsoredProductsLineItem",
    "attributes": {
      "name": "Retailer Billed Line Item",
      "campaignId": "718038552188952576",
      "targetRetailerId": "1298",
      "startDate": "2026-07-01T00:00:00+00:00",
      "endDate": null,
      "status": "inactive",
      "budget": null,
      "budgetSpent": 0.0,
      "budgetRemaining": null,
      "targetBid": 0.3,
      "maxBid": null,
      "monthlyPacing": null,
      "dailyPacing": null,
      "isAutoDailyPacing": false,
      "bidStrategy": "automated",
      "optimizationStrategy": "conversion",
      "keywordStrategy": "genericAndBranded",
      "flightSchedule": null,
      "createdAt": "2026-05-08T00:00:00+00:00",
      "updatedAt": "2026-05-08T00:00:00+00:00"
    }
  },
  "warnings": [],
  "errors": []
}

Sample Response — Error (retailer mismatch)

{
  "errors": [
    {
      "message": "The line item targetRetailerId must match the campaign retailerId.",
      "status": 400
    }
  ]
}

Search Retailer for an Account

This endpoint allows searching for available retailers for an account. The campaignAvailabilities object now includes budgetModel, allowing platforms to determine which budget models are supported at a given retailer before creating a campaign. Sample Request

curl -L -X POST 'https://api.criteo.com/2026-01/retail-media/accounts/625702934721171442/retailers/search' \
-H 'Content-Type: application/json' \
-H 'Accept: application/json' \
-H 'Authorization: Bearer <MY_ACCESS_TOKEN>' \
-d '{}'

Sample Response

{
  "data": [
    {
      "id": "retailer-789",
      "type": "Retailer",
      "attributes": {
        "name": "Example Retailer",
        "campaignAvailabilities": [
          {
            "buyType": "auction",
            "campaignType": "sponsoredProducts",
            "isAvailable": true,
            "budgetModel": "retailerBilled",
            "validCombinations": [
              {
                "pageType": "search",
                "pageEnvironmentType": "offsite"
              }
            ]
          }
        ]
      }
    }
  ]
}

Responses

Response	Title	Detail	Troubleshooting
🟢`200`	Success		Request executed successfully.
🔴`400`	Retailer-billed balance mapping	“Only retailer-sold campaigns are allowed to be mapped to a retailer-billed balance.”	Only campaigns scoped to the same retailer as the balance can be appended via`/campaigns/append`.
🔴`400`	`RetailerMismatchWithBalance`	Campaign`retailerId`does not match the balance`retailerId`.	Ensure the`retailerId`in campaign settings matches the`retailerId`on the balance you are associating.
🔴`400`	`RetailerMismatchWithCampaign`	Line item`targetRetailerId`does not match the campaign`retailerId`.	Ensure`targetRetailerId`on the line item matches the`retailerId`set on the parent campaign.
🔴`400`	`Error deserializing request`	A required field is missing or has an invalid value.	Review the request body against the attributes table above.
🔴`403`	`Unauthorized`		Verify your access token and that your account has access to the retailer in question.

​Introduction

​Business Context

​Prerequisites

​Key Concepts

​Endpoints Overview

​Attributes

​New and Changed Fields on Balances

​New Field on Campaigns

​New Fields on Retailer Search

​New Error Codes

​Endpoint Changes

​Get List of Balances for an Account

​Add Campaigns to a Balance

​Remove Campaign(s) from a Balance

​Create New Campaigns

​Get Campaigns by Account ID and Campaign ID

​Create an Auction Line Item

​Search Retailer for an Account

​Responses

Introduction

Business Context

Prerequisites

Key Concepts

Endpoints Overview

Attributes

New and Changed Fields on Balances

New Field on Campaigns

New Fields on Retailer Search

New Error Codes

Endpoint Changes

Get List of Balances for an Account

Add Campaigns to a Balance

Remove Campaign(s) from a Balance

Create New Campaigns

Get Campaigns by Account ID and Campaign ID

Create an Auction Line Item

Search Retailer for an Account

Responses