---
title: "Get changefile for a date"
method: GET
path: "/changefiles/{date}"
tags: ["Changefiles"]
---

# Get changefile for a date

`GET /changefiles/{date}`

## Request

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

Get details for a specific date's changefile, including which entity types changed, how many records, and download links in JSONL and Parquet formats. 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).

## Path parameters

- `date` string, date, required

## Query parameters

- `api_key` string, required

## Response `200`

Successful response

- object
  - `meta` object
    - `count` integer: Number of entity types with changes
    - `date` string, date: The changefile date
  - `results` object[]
    - `entity` string: The entity type (e.g., works, authors, institutions)
    - `records` integer: Number of created or modified records
    - `formats` object
      - `jsonl` object
        - `size_bytes` integer: File size in bytes
        - `size_display` string: Human-readable file size
        - `url` string, uri: Download URL for gzipped JSONL file
      - `parquet` object
        - `size_bytes` integer: File size in bytes
        - `size_display` string: Human-readable file size
        - `url` string, uri: Download URL for Parquet file

## 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/:date/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)