---
title: "Developer Guide"
manual: "TCA_API"
version: "2.2"
permalink: "https://docs.typo3.org/permalink/maikschneider/tca-api:developer@2.2"
source: "Developer/Index.rst"
rendered: "2026-10-12T13:17:40+00:00"
---

# Developer Guide {#developer}

This chapter covers the extensibility features of TCA_API: PSR-14 events, custom
operation handlers, and the request attribute API.

-   [PSR-14 Events](https://docs.typo3.org/permalink/maikschneider/tca-api:psr-14-events@2.2)
-   [Custom Operation Handlers](https://docs.typo3.org/permalink/maikschneider/tca-api:custom-operation-handlers@2.2)
-   [Request Attributes](https://docs.typo3.org/permalink/maikschneider/tca-api:request-attributes-1@2.2)
-   [Architecture](https://docs.typo3.org/permalink/maikschneider/tca-api:architecture-1@2.2)
-   [Configuration Module](https://docs.typo3.org/permalink/maikschneider/tca-api:configuration-module-1@2.2)