ResourcesIntegrationsVoices (Text-to-speech)

Microsoft

Use Microsoft’s MAI text-to-speech voices for your Vapi voice agent.

Microsoft is a text-to-speech provider you can use for your voice agent’s voice, offering the MAI-Voice-2 voices from Azure AI Speech. This page covers what Microsoft is and how to select a voice.

What is Microsoft

Microsoft provides the MAI-Voice-2 text-to-speech voices through Azure AI Speech. On Vapi, you select a Microsoft voice for an assistant.

You can use Microsoft through Vapi’s default integration, or use your own account by connecting it in Integrations.

Text-to-speech

Set voice.provider to microsoft and voice.voiceId to a voice. Microsoft offers many voices, you can browse and copy a voice’s ID from the Voice Library.

$curl -X PATCH "https://api.vapi.ai/assistant/ASSISTANT_ID" \
>  -H "Authorization: Bearer $VAPI_API_KEY" \
>  -H "Content-Type: application/json" \
>  -d '{
>    "voice": { "provider": "microsoft", "voiceId": "en-US-Ethan:MAI-Voice-2" }
>  }'

For additional API configuration options, review the MicrosoftVoice fields in the Create Assistant API reference.

Voices

Compare every text-to-speech provider Vapi supports.