Rooms

Start speech-to-text on all room participants

post/rooms/{id}/stt

Request body

languagestring required

Language code (e.g. "en", "es")

partialboolean required

Emit partial (non-final) transcripts

provider'elevenlabs' | 'deepgram' | 'deepgram_flux' | 'azure' | 'speechmatics'

STT provider: "elevenlabs" (default), "deepgram" (/v1/listen), "deepgram_flux" (/v2/listen, conversational turn detection), "azure" or "speechmatics"

api_keystring

API key override (falls back to ELEVENLABS_API_KEY, DEEPGRAM_API_KEY, AZURE_SPEECH_KEY or SPEECHMATICS_API_KEY env var depending on provider)

modelstring

Provider-specific model. Deepgram: default "nova-3". Deepgram Flux: "flux-general-en" (default) or "flux-general-multi". Speechmatics: "standard" (default) or "enhanced".

keytermsstring[]

Terms to boost recognition of (Deepgram, Deepgram Flux, and Speechmatics — where they become additional_vocab).

endpointinginteger

Deepgram: milliseconds of silence before a segment is finalized; 0 disables endpointing. Speechmatics: maps to max_delay, clamped to 700-4000 ms; 0 leaves the provider default.

utterance_end_msinteger

Deepgram: milliseconds of silence after which an stt.turn event with event=utterance_end is emitted. Deepgram requires interim results for this, which are requested automatically and still suppressed unless partial is true. Speechmatics: milliseconds of silence that close a turn and emit an stt.turn event with event=end_of_turn — default 600, capped at 2000, and 0 disables turn detection.

eager_eot_thresholdnumber

Deepgram Flux only: end-of-turn confidence that fires an eager_end_of_turn stt.turn event, enabling speculative generation. Must be between 0.3 and 0.9. When unset, no eager_end_of_turn or turn_resumed events are emitted at all.

eot_thresholdnumber

Deepgram Flux only: end-of-turn confidence required to close a turn. Deepgram default 0.7.

eot_timeout_msinteger

Deepgram Flux only: milliseconds of silence after which a turn is closed regardless of confidence. Deepgram default 5000.

language_hintsstring[]

Deepgram Flux only: candidate language codes for the "flux-general-multi" model.

Response

STT started

instance_idstring

Instance identifier

statusstring required

Changes

Changed in 7 of the 67 revisions of this API.4118

Aug 24, 2026bed02e8b88861See the full diff
- ○
  added the new speechmatics enum value to the request property provider
  request-property-enum-value-added
Aug 10, 2026c951ca5dcd0810See the full diff
- ○
  added the new optional request property eager_eot_threshold
  new-optional-request-property
- ○
  added the new optional request property endpointing
  new-optional-request-property
- ○
  added the new optional request property eot_threshold
  new-optional-request-property
- ○
  added the new optional request property eot_timeout_ms
  new-optional-request-property
- ○
  added the new optional request property keyterms
  new-optional-request-property
- ○
  added the new optional request property language_hints
  new-optional-request-property
- ○
  added the new optional request property model
  new-optional-request-property
- ○
  added the new optional request property utterance_end_ms
  new-optional-request-property
- ○
  added the new azure enum value to the request property provider
  request-property-enum-value-added
- ○
  added the new deepgram_flux enum value to the request property provider
  request-property-enum-value-added
Apr 13, 20268fca8ce718d01See the full diff
- ▲
  removed the enum value azure of the request property provider
  request-property-enum-value-removed
Apr 6, 20263eeffdee9d4f1See the full diff
- ○
  added the new azure enum value to the request property provider
  request-property-enum-value-added
Mar 26, 20267856459e2b721See the full diff
- ○
  added the new optional request property provider
  new-optional-request-property
This revision also has 1 change that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog
Mar 26, 2026d09c97c6ca8c14See the full diff
- ●
  removed the request property provider
  request-property-removed
- ○
  the request property language became optional
  request-property-became-optional
- ○
  the request property partial became optional
  request-property-became-optional
- ○
  added the required property leg_ids to the response with the 200 status
  response-required-property-added
- ○
  added the required property room_id to the response with the 200 status
  response-required-property-added
This revision also has 40 changes that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog
Mar 26, 2026818619c99a1d31See the full diff
- ▲
  the request property language became required
  request-property-became-required
- ▲
  removed the required property leg_ids from the response with the 200 status
  response-required-property-removed
- ▲
  removed the required property room_id from the response with the 200 status
  response-required-property-removed
- ○
  the request property partial with a default value became required
  request-property-became-required-with-default
This revision also has 6 changes that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog

Full history