---
title: "Get a flattened list of resource categories"
method: GET
path: "/resource-categories/flattened"
tags: ["Resource categories"]
---

# Get a flattened list of resource categories

`GET /resource-categories/flattened`

Get a flattened list of resource categories.

## Response `200`

OK

## Other responses

- `default` — Error

## Changes

- **2026-03-18** `e271d0e41f6d` — 5 info
  - api operation id `get_resource_categories_flattened` removed and replaced with `getResourceCategoriesFlattened`
  - the endpoint scheme security `XF-Api-Key` was added to the API
  - the endpoint scheme security `XF-OAuth2` was added to the API
  - added the new optional `header` request parameter `XF-Api-User` to all path's operations
  - …1 more
- **2026-03-06** `0f490cfb7931` — 2 info
  - api tag `Resource categories` added
  - api tag `resource-categories` removed
- **2026-02-05** `488d42c463a9` — 1 info
  - endpoint added
- **2026-02-03** `fc0a40f3b859` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/xenforo-ltd/apis/xenforo-api/changes/resource-categories/flattened/get.md)

---

[API](https://skmtc.dev/xenforo-ltd/apis/xenforo-api.md) · [All operations](https://skmtc.dev/xenforo-ltd/apis/xenforo-api/llms.txt) · [OpenAPI document](https://skmtc.dev/xenforo-ltd/apis/xenforo-api/revisions/b15eba33657a?raw)