---
title: "Marking the duplicate listing item."
method: POST
path: "/api/v4/locations/listings/mark-as-duplicate"
tags: ["Listings"]
---

# Marking the duplicate listing item.

`POST /api/v4/locations/listings/mark-as-duplicate`

Flags one or more detected listing items as confirmed duplicates so Listings API can suppress them.

## Request body

- object
  - `input` MarkAsDuplicateInput, required
    - `listingItemIds` string[], required
    - `locationId` string

## Response `200`

Successful response

- MutationResultType — (also defined by crawler)
  - `success` boolean, required
  - `errors` MutationErrorType[]
    - `code` string
    - `message` string, required
    - `path` string[]

## Other responses

- `400` — Bad request
- `401` — Unauthorized
- `500` — Server error

## Changes

- **2026-07-26** `f41a4d1dfdb8` — 1 breaking, 2 warning
  - added the new required request property `input`
  - removed the request property `listingItemIds`
  - removed the request property `locationId`

[Change history](https://skmtc.dev/listingsapi/apis/listings-api/changes/api/v4/locations/listings/mark-as-duplicate/post.md)

---

[API](https://skmtc.dev/listingsapi/apis/listings-api.md) · [All operations](https://skmtc.dev/listingsapi/apis/listings-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/listingsapi/listings-api/revisions/2d0f7a88fc45/schema)