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

# Merchant Updates

`GET /summaries/delta`

## Request

- Base URL: `https://viglink.io/merchants/rates`
- URL: `https://viglink.io/merchants/rates/summaries/delta`
- Auth: API key in header `Authorization`

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/merchant-group-summaries-api.md) - [All operations](https://skmtc.dev/sovrn/apis/merchant-group-summaries-api/llms.txt) - [OpenAPI document](https://skmtc.dev/sovrn/apis/merchant-group-summaries-api/revisions/1418cb002d50?raw)