---
title: "Merchant Updates"
method: GET
path: "/summaries/delta"
tags: ["Merchant Group Summaries"]
---

# Merchant Updates

`GET /summaries/delta`

This endpoint retrieves only the updated merchants since your last query, including geo-specific rates and performance metrics.

## Query parameters

- `campaignId` integer, required
- `page` integer
- `pageSize` integer
- `since` string, date-time

## Headers

- `If-None-Match` string
- `Accept-Encoding` 'gzip'

## Response `200`

Successfully retrieved merchant group summaries

- IOCollectionResponse
  - `results` MerchantGroupSummaryResponse[]
    - `groupId` integer
    - `name` string
    - `description` string
    - `terms` string
    - `sovrnPreferred` boolean
    - `logoImageUrl` string
    - `category` string[]
    - `sovrn` NetworkSummary
      - `CPA` CPASummary[]
        - `geo` string
        - `averageEpc` number, float
        - `averageOrderValue` number, float
        - `calculatedCommissionRate` number, float
        - `rates` MerchantRateDto[]
          - `currentRate` number, double
          - `rateFormat` string
          - `action` string
          - `details` string
        - `domains` string[]
      - `CPC` CPCSummary
        - `calculatedEpc` number, float
  - `page` integer
  - `perPage` integer
  - `totalItems` integer

## Other responses

- `304` — No changes since the specified timestamp
- `400` — Bad request parameters
- `401` — Unauthorized request
- `404` — Resource not found
- `429` — Too many requests (rate limit exceeded)
- `500` — Internal server error

---

[API](https://skmtc.dev/sovrn/apis/rest.md) · [All operations](https://skmtc.dev/sovrn/apis/rest/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/sovrn/rest/revisions/cb783ced960d/schema)