ResourcesIntegrationsVoices (Text-to-speech)

LMNT

Use LMNT text-to-speech voices with your Vapi voice agent.

LMNT provides streaming text-to-speech voices for Vapi assistants, including voices from its catalog and supported cloned voices.

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

Text-to-speech

Set voice.provider to lmnt and voice.voiceId to a voice. LMNT offers many voices and supports voice cloning. You can browse and copy a voice’s ID from the Voice Library; the default voice is morgan.

$curl -X PATCH "https://api.vapi.ai/assistant/ASSISTANT_ID" \
>  -H "Authorization: Bearer $VAPI_API_KEY" \
>  -H "Content-Type: application/json" \
>  -d '{
>    "voice": {
>      "provider": "lmnt",
>      "voiceId": "morgan",
>      "language": "auto"
>    }
>  }'

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

Configuration options

OptionAccepted valuesDescription
voiceIdLMNT voice IDSelects a preset, shared, or cloned LMNT voice.
languageSupported language code or autoSelects a language or enables automatic detection.
speed0.25 to 2Controls speaking speed.

Supported languages

Set voice.language to auto to automatically detect the language, or use one of the supported language codes below.

The following languages are included in LMNT’s supported language catalog and accepted by Vapi.

LanguageLanguage code
Arabicar
Assameseas
Bengalibn
Chinesezh
Czechcs
Danishda
Dutchnl
Englishen
Finnishfi
Frenchfr
Germande
Hindihi
Indonesianid
Italianit
Japaneseja
Koreanko
Malayalamml
Marathimr
Polishpl
Portuguesept
Russianru
Slovaksk
Spanishes
Swedishsv
Tamilta
Telugute
Thaith
Turkishtr
Ukrainianuk
Urduur
Vietnamesevi
Voices

Compare every text-to-speech provider Vapi supports.