[Документация Yandex Cloud](../../../../index.md) > [speechkit](../../../index.md) > Справочники API > Распознавание > API v3 gRPC (англ.) > Overview

# SpeechKit Recognition API v3: gRPC reference

The SpeechKit Speech To Text Service API v3 allows application developers to use speech recognition technologies. <br>The service does not operate with resources. Actions are performed by making RPC calls. For more information about API architecture, see [API Concepts](../../../../api-design-guide/index.md).

**Interface definitions** available at [GitHub](https://github.com/yandex-cloud/cloudapi/tree/master/yandex/cloud/ai/stt/v3).

**Service URL**: `stt.api.ml.yandexcloud.kz`

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||Service | Description ||
|| [AsyncRecognizer](AsyncRecognizer/index.md) | A set of methods for asynchronous speech recognition: recognize pre-recorded audio and receive results by request. ||
|| [Operation](Operation/index.md) | A set of methods for managing operations for asynchronous API requests. ||
|| [Recognizer](Recognizer/index.md) | A set of methods for streaming speech recognition. ||
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