---
title: "Specialized services"
manual: "LLM Foundation"
version: "main"
permalink: "https://docs.typo3.org/permalink/netresearch/nr-llm:api-specialized-services@main"
source: "Api/SpecializedServices.rst"
rendered: "2026-11-12T15:41:35+00:00"
---

# Specialized services {#api-specialized-services}

These paths serve translation, image, speech or document operations rather
than a generic chat request. Credential lookup, pricing units and result types
can differ. See [Verifying the specialized services](https://docs.typo3.org/permalink/netresearch/nr-llm:administration-specialized-services@main) for configuration
and explicit quota-spending checks.

-   `Specialized\Translation\TranslatorInterface` is an extension point for
    registered translators. It requires identity/name, static priority,
    availability, language-pair support, language discovery, single and batch
    translation, and detection. Translation returns [TranslatorResult](https://docs.typo3.org/permalink/netresearch/nr-llm:api-translator-result@main).
    Prefer [TranslationService](https://docs.typo3.org/permalink/netresearch/nr-llm:api-translation-service@main) as the consumer facade.
-   `Specialized\Translation\TranslatorRegistryInterface` supplies registered
    translators; registration does not mean usable credentials exist.
-   `Specialized\Image\ImageGeneratorInterface` abstracts image generation
    for consumers. Match its result and options to the selected generator;
    not every generator implements every provider-specific option.
-   `Specialized\Document\PdfRasterizerInterface` provides document
    rasterization. It needs the configured local runtime; it is not an LLM.
-   `Specialized\Speech\TextToSpeechService` and
    `WhisperTranscriptionService` are public concrete services with
    `SpeechSynthesisResult` and `TranscriptionResult`. This revision has
    no separate public speech-service interface to recommend.

The `@api` classification is per type/member; an interface's existence does
not automatically make every implementation a stable extension point. See
[API stability](https://docs.typo3.org/permalink/netresearch/nr-llm:api-stability@main). Keep provider credentials in nr-vault and supply a
trusted budget/actor context rather than treating a caller-supplied user ID
as authentication.