---
title: "Observed listing changes (1 unit)"
method: GET
path: "/v1/listing_changes"
---

# Observed listing changes (1 unit)

`GET /v1/listing_changes`

## Request

- Base URL: `https://api.theusedcarindex.com`
- URL: `https://api.theusedcarindex.com/v1/listing_changes`
- Auth: one of:
  - HTTP bearer
  - API key in header `X-API-Key`

## Query parameters

- `make` string
- `model` string
- `year` integer
- `vin` string
- `event_type` 'new' | 'price_drop' | 'relisted' | 'delisted'
- `since` string, date: Inclusive start date.
- `until` string, date: Inclusive end date.
- `limit` integer
- `cursor` string: Opaque next_cursor; retain the same filters.

## Response `200`

Success

- ListingChanges
  - `events` ListingEvent[], required
    - `id` integer, required
    - `event_date` string, date, required
    - `event_type` 'new' | 'price_drop' | 'relisted' | 'delisted', required
    - `vin` string, required
    - `make` string, required
    - `model` string, required
    - `year` integer, required
    - `price_old` number, nullable, required
    - `price_new` number, nullable, required
    - `mileage` number, nullable, required
    - `listing_url` string, uri, required
    - `source` string, required
  - `next_cursor` string, nullable, required
  - `collectors` object, required
    - `status` 'no_active_sources' | 'active', required
    - `sources_active` integer, required
    - `last_run_at` string, nullable, required
  - `notes` string[], required

## Other responses

- `400`: RFC 9457 problem with stable code; 429 includes Retry-After.
- `401`: RFC 9457 problem with stable code; 429 includes Retry-After.
- `403`: RFC 9457 problem with stable code; 429 includes Retry-After.
- `404`: RFC 9457 problem with stable code; 429 includes Retry-After.
- `405`: RFC 9457 problem with stable code; 429 includes Retry-After.
- `413`: RFC 9457 problem with stable code; 429 includes Retry-After.
- `415`: RFC 9457 problem with stable code; 429 includes Retry-After.
- `429`: RFC 9457 problem with stable code; 429 includes Retry-After.
- `500`: RFC 9457 problem with stable code; 429 includes Retry-After.
- `503`: RFC 9457 problem with stable code; 429 includes Retry-After.

---

[API](https://skmtc.dev/theusedcarindex/apis/the-used-car-index.md) · [All operations](https://skmtc.dev/theusedcarindex/apis/the-used-car-index/llms.txt) · [OpenAPI document](https://skmtc.dev/theusedcarindex/apis/the-used-car-index/revisions/80dd1305d05c?raw)