v1
latestOpenAPI 3.1.02026-08-04576672.7 KBVapi Synthesize
Vapi custom TTS webhook.
With message.call.id: clause POSTs of one agent turn share a TTS session (KV continuation). Without it (test harness, non-Vapi callers): a stateless one-shot synthesis.
post/vapi/synthesize
Query parameters
voice_idstring nullable
model_idstring nullable
Headers
x-voice-idstring nullable
Request body
Response
Successful Response
{"stackTrail":"paths:/vapi/synthesize:post:responses:200:content:application/json:schema","oasType":"schema","type":"unknown"}