---
title: "Mark listings as duplicates"
method: POST
path: "/locations/listings/mark-as-duplicate"
tags: ["Listings"]
---

# Mark listings as duplicates

`POST /locations/listings/mark-as-duplicate`

## Request

- Base URL: `https://api.synup.com/api/v4`
- URL: `https://api.synup.com/api/v4/locations/listings/mark-as-duplicate`
- Auth: none required
- TypeScript: <https://skmtc.dev/synup/apis/synup-api/docs/locations/listings/mark-as-duplicate/post.ts> (a function with typed inputs; its response is checked against the schema)

This API flags one or more listings as duplicates for a specific location.

**Behavior:**
- Identifies listings that represent the same business but appear separately across different directories.
- Helps maintain data consistency by marking duplicate entries for review or removal.

## Headers

- `Authorization` string, required
- `Content-Type` string, required

## Request body

- object
  - `input` object, required
    - `locationId` string, required: The unique identifier of the location
    - `listingItemIds` string[], required: Array of listing IDs to mark as duplicates

## Response `200`

Listings marked as duplicates successfully

- object
  - `data` object
    - `markAsDuplicate` object
      - `clientMutationId` string, nullable: Optional client-provided mutation identifier
      - `errors` string[], nullable: Array of error messages if any occurred
      - `success` boolean: Indicates if the operation was successful
      - `warnings` string[], nullable: Array of warning messages if any occurred

## Other responses

- `400`: Bad request - invalid input parameters
- `401`: Unauthorized - invalid or missing API key
- `403`: Forbidden - insufficient permissions
- `404`: Location or listings not found

---

[API](https://skmtc.dev/synup/apis/synup-api.md) - [All operations](https://skmtc.dev/synup/apis/synup-api/llms.txt) - [OpenAPI document](https://skmtc.dev/synup/apis/synup-api/revisions/67de2d51c22e?raw)