---
title: "Configuration Module"
manual: "TCA_API"
version: "2.2"
permalink: "https://docs.typo3.org/permalink/maikschneider/tca-api:configuration-module@2.2"
source: "Developer/ConfigurationModule.rst"
rendered: "2026-10-12T13:17:40+00:00"
---

# Configuration Module {#configuration-module}

When `typo3/cms-lowlevel` is installed, TCA_API registers a provider in the
TYPO3 backend **Configuration** module (**System → Configuration**).
The provider displays all loaded resource definitions as an interactive tree,
which is useful for debugging your setup and verifying that definitions are
loaded and parsed as expected.

![TCA_API configuration tree in the TYPO3 Configuration module](../Images/ConfigurationModule.jpg)

## What is shown {#what-is-shown}

Each resource definition is listed by its `resourceName` and expanded into all
resolved properties. All values reflect the parsed state after `ApiDefinitionLoader`
has normalised the raw PHP arrays — so what you see is exactly what the extension acts
on at runtime.

> [!NOTE]
> The tree is read-only. It reflects the in-memory state after the DI
> container has been warmed up. Clear the TYPO3 caches after changing a
> resource definition file to see the updated values.