Post-Transfer Transcript Stream (WebSocket)

{
  "event": "transcript_segment",
  "call_id": "9d404c1b-6a23-4b21-a7f9-64f8456ba0ec",
  "segment": {
    "start": 12.4,
    "end": 15.1,
    "speaker": 1,
    "speaker_label": "user",
    "text": "I was calling about my appointment on Thursday.",
    "confidence": 0.97
  }
}

{ "event": "stream_end", "call_id": "9d404c1b-6a23-4b21-a7f9-64f8456ba0ec" }

// 1. Get a connection URL (server-side)
const res = await fetch(
  `https://api.bland.ai/v1/calls/${callId}/transcript-stream/token`,
  { method: "POST", headers: { authorization: BLAND_API_KEY } },
);
const { data } = await res.json();

// 2. Connect (safe in a browser — the URL carries only a short-lived credential)
const ws = new WebSocket(data.url);

ws.onmessage = (event) => {
  const msg = JSON.parse(event.data);
  if (msg.event === "transcript_segment") {
    const s = msg.segment;
    console.log(`[${s.start}s] ${s.speaker_label}: ${s.text}`);
  } else if (msg.event === "stream_end") {
    console.log("Transfer ended");
  }
};