Chat reply API

Inbound direction: your system (custom AI, Make, n8n, backend) posts a reply into the webinar room chat.

Access: early access. Webivio support enables it on your account (whitelist like Live). Without the grant the endpoint returns 403, and the webinar.chat.message event is hidden in webhook settings.

Typical AI flow:

Webivio emits outbound webhook webinar.chat.message (text + message_id + participant data).
Your service generates a reply.
You call this endpoint with account token wvapi_….

The token is the same as in the Stats API: Settings → API tokens.

Auth

Authorization: Bearer wvapi_YOUR_TOKEN

X-Api-Key: wvapi_YOUR_TOKEN

Endpoint

POST /api/public/v1/webinars/{webinarId}/chat/reply
Content-Type: application/json

Body — private reply

Visible only to the participant linked to the webhook message:

{
  "text": "Thanks for the question — we will cover it in the recording shortly.",
  "visibility": "private",
  "replyToMessageId": "uuid-from-webhook-data.message_id"
}

Body — public reply

Like a moderator broadcast to participants:

{
  "text": "Welcome to the webinar!",
  "visibility": "public"
}

Field	Required	Description
`text`	yes	1–4000 characters
`visibility`	yes	`"private"` or `"public"`
`replyToMessageId`	when `private`	Participant message UUID (`data.message_id` from the webhook)

Responses

Private:

{ "ok": true, "mode": "reply", "messageId": "…" }

Public:

{ "ok": true, "mode": "broadcast", "inserted": 42 }

Typical errors: 401 (token), 404 (webinar / message), 400 (validation / no participants), 429 (rate limit).

Notes

Replies from this API do not re-emit webinar.chat.message.
Chat history export: panel Chat messages (CSV/TXT) — no public list API yet.
Rate limits: same as Stats API (~60/min, ~600/h per token).