For AI agents: a documentation index is available at the root level at /llms.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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Voice AgentsModels
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DocumentationAPI ReferenceSelf HostModel CardsClient LibrariesIntegrationsDeveloper ToolsDeprecationsChangelog
Voice AgentsModels
DocumentationAPI ReferenceSelf HostModel CardsClient LibrariesIntegrationsDeveloper ToolsDeprecationsChangelog
    • General
    • Lightning v3.1
    • Pulse STT
    • Hydra
  • General
  • Lightning v3.1
  • Pulse STT
  • Hydra
Pricing

General

August 10, 2026
August 10, 2026

Speech to Text: VAD events on the live WebSocket API reference

The Pulse STT live WebSocket now models the acoustic voice-activity events in the API reference: speech_started and speech_ended, emitted alongside transcription messages when the connection sets vad_events=true. See VAD events for the payloads and usage.

The events have been in production; this documents them on the WebSocket reference.

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