Speech-to-speech (EVI)

Hume is sunsetting the TTS and EVI APIs. Access ends November 13, 2026 at 12:01 a.m. EST, and both APIs remain fully supported until then. Any data in your account is permanently deleted after November 13, 2026. To compare alternative voice models, see Real World VoiceEQ. For questions, contact Hume support or email [email protected].

The EVI API provides a WebSocket endpoint for real-time voice conversations and REST endpoints for managing configs, prompts, tools, and chat history.