---
title: "List changefile dates"
method: GET
path: "/changefiles"
tags: ["Changefiles"]
---

# List changefile dates

`GET /changefiles`

## Request

- Base URL: `https://api.openalex.org`
- URL: `https://api.openalex.org/changefiles`
- Auth: API key in query parameter `api_key`

List all available changefile dates. Each date has downloadable files containing every entity record that was created or modified on that day. For a full guide on using changefiles to keep your local data current, see [Download Changefiles](/download/changefiles). **Requires a paid plan** — contact sales@openalex.org or see [pricing](https://openalex.org/pricing).

## Query parameters

- `api_key` string, required

## Response `200`

Successful response

- object
  - `meta` object
    - `count` integer: Number of available changefile dates
  - `results` object[]
    - `date` string, date: The changefile date (YYYY-MM-DD)
    - `url` string, uri: URL to get details and download links for this date

## Other responses

- `429`: Rate limit exceeded

## Changes

- **2026-10-04** `7524ef121829`: 1 info
  - endpoint added
- **2026-08-04** `60b6c8bd0799`: 1 breaking
  - api path removed without deprecation

[Operation history](https://skmtc.dev/openalex/apis/openalex-api/changes/changefiles/get.md)

---

[API](https://skmtc.dev/openalex/apis/openalex-api.md) - [All operations](https://skmtc.dev/openalex/apis/openalex-api/llms.txt) - [OpenAPI document](https://skmtc.dev/openalex/apis/openalex-api/revisions/c19f2b12a2e3?raw)