---
title: "Public API of the TYPO3 linkvalidator"
manual: "Link Validator"
version: "main"
permalink: "https://docs.typo3.org/permalink/typo3/cms-linkvalidator:linkvalidatorapi-linktypeinterface@main"
source: "Development/Api/Index.rst"
rendered: "2026-09-22T20:19:04+00:00"
---

# Public API of the TYPO3 linkvalidator {#linkvalidatorapi-linktypeinterface}

The following classes and interfaces are frequently used by developers
of third party extensions. For the complete API have a look into the code.

-   `\TYPO3\CMS\Linkvalidator\Linktype\AbstractLinktype`
-   `\TYPO3\CMS\Linkvalidator\Linktype\LinktypeInterface`
-   `\TYPO3\CMS\Linkvalidator\Linktype\LabelledLinktypeInterface`

The following events can be listened to:

-   [BeforeRecordIsAnalyzedEvent](https://docs.typo3.org/permalink/t3coreapi:beforerecordisanalyzedevent)
-   [ModifyValidatorTaskEmailEvent](https://docs.typo3.org/permalink/t3coreapi:modifyvalidatortaskemailevent)