Line Item Diagnostics

Overview

Use the Line Item Diagnostics endpoint to check whether a line item is configured correctly. The response reports a status for each evaluated line item and, when requested, the configuration context, evaluated parameters, and issues that require attention.

Availability: Coming soonThis endpoint is documented ahead of availability in the Experimental Retail Media API.

You can check one line item or a page of line items in one campaign. Your access token must be authorized to view the selected resource. See Authentication.

Endpoint

Method	Endpoint	Description	Availability
`GET`	`/diagnostics/line-item-checks`	Get diagnostics for one line item or a page of a campaign’s line items.	Coming soon

Get Line Item Diagnostics

Send exactly one resource selector: line-item-id or campaign-id. A line-item request returns one result. A campaign request returns a paginated result set.

Query Parameters

Parameter	Type	Required	Description
`line-item-id`	string	One selector is required	ID of the line item to evaluate. Do not send it with `campaign-id`.
`campaign-id`	string	One selector is required	ID of the campaign whose line items to evaluate. Do not send it with `line-item-id`.
`as-approved`	boolean	No	When `true` (default), evaluates the approved Onsite Display line item when one exists. Set to `false` to evaluate the current proposal.
`fields`	string	No	Comma-separated optional attributes to include: `context`, `issues`, and `parameters`. All three are included when omitted.
`cursor`	string	No	The cursor from the previous campaign response. Only valid with `campaign-id`; it must be a positive integer.
`limit`	integer	No	Maximum results in a campaign page. Only valid with `campaign-id`; from `1` to `25`, default `25`.

status and systemData are always included. Do not include them in fields; the request succeeds but includes an invalid-fields warning. Sample Request

curl -L -X GET \
  'https://api.criteo.com/experimental/retail-media/diagnostics/line-item-checks?line-item-id=112233445566778899&fields=context,issues' \
  -H 'Accept: application/json' \
  -H 'Authorization: Bearer <MY_ACCESS_TOKEN>'

Response Attributes

Each result is in data[].attributes.

Attribute	Type	Description
`status`	string	`CanFullyServe`, `CanPartiallyServe`, `CannotServe`, or `Unknown`. Always included.
`systemData`	object	Check and source timestamps: `checkTime`, `lineItemCreatedTime`, and `lineItemUpdatedTime`. Always included.
`context`	object	IDs and types associated with the check: `accountId`, `campaignId`, `retailerId`, `lineItemId`, `campaignType`, and `buyType`.
`parameters`	object	Name/value pairs used while evaluating rules.
`issues`	array	Issues found in the line item’s configuration. Each issue includes `ruleId`, `ruleName`, `code`, `severity`, `tags`, `format`, `outputParameters`, `message`, `id`, and optional `parentId`.

Status Values

Status	Description
`CanFullyServe`	The line item is correctly configured, with no identified issues that limit serving.
`CanPartiallyServe`	The line item can serve in some contexts, but one or more issues limit serving.
`CannotServe`	Configuration issues prevent the line item from serving.
`Unknown`	The check could not complete. Inspect `warnings` and retry later.

For campaign requests, metadata contains cursor (the next page cursor, or null), limit, and count. Sample Response — 200 OK

{
  "data": [
    {
      "attributes": {
        "status": "CannotServe",
        "systemData": {
          "checkTime": "2026-10-21T14:30:00Z",
          "lineItemCreatedTime": "2026-10-01T09:00:00Z",
          "lineItemUpdatedTime": "2026-10-21T14:00:00Z"
        },
        "context": {
          "accountId": "12345",
          "campaignId": "99887766",
          "retailerId": "54321",
          "lineItemId": "112233445566778899",
          "campaignType": "OnsiteDisplay",
          "buyType": "Auction"
        },
        "issues": [
          {
            "ruleId": "creative-required",
            "ruleName": "Creative required",
            "code": "no-approved-creative",
            "severity": "Error",
            "tags": ["creative"],
            "format": "No approved creative is associated with this line item.",
            "outputParameters": {},
            "message": "No approved creative is associated with this line item.",
            "id": 1,
            "parentId": null
          }
        ]
      }
    }
  ],
  "warnings": []
}

Result Availability

An unexpected evaluation failure returns 200 OK with status set to Unknown and a result-unavailable warning. Treat this as an incomplete result and retry later; do not interpret it as confirmation that the line item can serve.

Errors

HTTP status	Code	Description
`400`	`request-invalid`	Both or neither selector was supplied, or campaign pagination is invalid.
`400`	`invalid-fields`	`fields` contains an unsupported or duplicate optional field.
`401`	—	The caller is not authenticated.
`403`	`not-authorized`	The resource does not exist, has an invalid ID, or the caller cannot access it.

Introduction

Guides for Retail Media API

Line Item Diagnostics

Overview

Endpoint

Get Line Item Diagnostics

Query Parameters

Response Attributes

Status Values

Result Availability

Errors

​Overview

​Endpoint

​Get Line Item Diagnostics

​Query Parameters

​Response Attributes

​Status Values

​Result Availability

​Errors

Overview

Endpoint

Get Line Item Diagnostics

Query Parameters

Response Attributes

Status Values

Result Availability

Errors