Stream a transcript over WebSocket

Polling GET /transcripts/... works, but for a live UI you want segments pushed as they’re produced. The gateway exposes a multiplexed WebSocket at /ws that fans transcripts out in real time.

Connect and authenticate

Connect to /ws on the gateway and authenticate with your API key — as a header, or as an api_key query parameter when the client can’t set headers:

ws://localhost:18056/ws          # header:  X-API-Key: <API_KEY>
ws://localhost:18056/ws?api_key=<API_KEY>

A missing key gets a missing_api_key error frame; an invalid key is rejected with close code 4401. Send a subscribe action naming the meetings you want. The socket multiplexes — subscribe to several at once:

{ "action": "subscribe",
  "meetings": [ { "platform": "google_meet", "native_id": "abc-defg-hij" } ] }

The gateway authorizes each meeting against your key and acks with what you’re now subscribed to:

{ "type": "subscribed", "meetings": [ { "platform": "google_meet", "native_id": "abc-defg-hij" } ] }

Transcript segments then stream in as frames. Live drafts arrive as completed: false and are replaced by completed: true confirmations — render the draft, then overwrite it when the confirmation lands. health frames surface engine/no-signal faults in-band.

Unsubscribe and keepalive

{ "action": "unsubscribe", "meetings": [ { "platform": "google_meet", "native_id": "abc-defg-hij" } ] }
{ "action": "ping" }     // → { "type": "pong" }

Example (Node)

import { WebSocket } from "ws";

const ws = new WebSocket("ws://localhost:18056/ws", { headers: { "X-API-Key": process.env.API_KEY } });

ws.on("open", () => ws.send(JSON.stringify({
  action: "subscribe",
  meetings: [{ platform: "google_meet", native_id: "abc-defg-hij" }],
})));

ws.on("message", (raw) => {
  const msg = JSON.parse(raw);
  if (msg.type === "subscribed") return console.log("subscribed", msg.meetings);
  if (msg.segments) for (const s of msg.segments)
    console.log(s.completed ? "✓" : "…", s.speaker, s.text);
});

Error frames

`error`	Meaning
`missing_api_key`	no key supplied
`invalid_api_key`	key rejected (socket closes 4401)
`invalid_json`	payload wasn’t a JSON object
`invalid_subscribe_payload`	`meetings` missing, empty, or has no valid `{platform, native_id}`
`unknown_action`	`action` wasn’t `subscribe` / `unsubscribe` / `ping`

Prefer pull-based? Stick with polling the transcript endpoint.

Start here

How-to: Meetings

How-to: Agents

How-to: Meetings + agents

Core

Concepts

Architecture

API reference

Deployment & operations

Roadmap

Governance

Stream a transcript over WebSocket

Connect and authenticate

Unsubscribe and keepalive

Example (Node)

Error frames

​Connect and authenticate

​Subscribe

​Unsubscribe and keepalive

​Example (Node)

​Error frames

Connect and authenticate

Subscribe

Unsubscribe and keepalive

Example (Node)

Error frames