Getting Statistics

Overview

Single-Seller performance is exposed via the same MPO stats APIs used for multi-seller campaigns. The key difference is using the right combination of identifiers to get data at the correct granularity.

Available stats endpoints

Endpoint	Use case
`GET /marketplace-performance-outcomes/stats/campaigns`	Template-level aggregation across all sellers
`GET /marketplace-performance-outcomes/stats/sellers`	Per-seller aggregation across campaigns
`GET /marketplace-performance-outcomes/stats/seller-campaigns`	Per seller-campaign (most granular)

You can find full endpoint details in the
Marketplace Performance Outcomes – Stats Reference.

Choosing the right identifiers

Use the appropriate combination of identifiers depending on the granularity you need:

Identifier	When to use
`campaignId` (template)	Filter stats for all sellers under a specific template
`sellerId`	Filter stats for a specific seller across templates
`sellerCampaignId`	Filter stats for a specific seller on a specific template (most precise)

Monitoring after onboarding

After creating a seller's first budget and once the Single-Seller campaign is provisioned:

Allow for the asynchronous provisioning delay before expecting impressions.
Query GET /marketplace-performance-outcomes/stats/seller-campaigns with:
- sellerId = the onboarded seller
- campaignId = the template campaign ID
Monitor impression volume and spend; if a productSet is configured, a whitelist with many invalid or inactive IDs may result in under-delivery.