call.recording.ready

Fires when a call recording has been processed and is available for download.

2026-06-27

Status: This event will start emitting once gateway-go upstream signals land. The contract documented here is stable.

call.recording.ready fires once the recording pipeline has written and indexed the audio file for a completed call. It carries a presigned URL for download; the URL expires according to your workspace's storage-tier retention policy. The event is routed per-number via voice_callback_url / events_url and is not subscribable as a workspace webhook.

{
  "kind": "call.recording.ready",
  "event_id": "01900000-0000-7000-8000-000000000001",
  "workspace_id": "01900000-0000-7000-8000-000000000002",
  "occurred_at": "2026-06-27T10:06:00.000Z",
  "data": {
    "call_id": "01900000-0000-7000-8000-000000000003",
    "number_id": "01900000-0000-7000-8000-000000000004",
    "recording_id": "01900000-0000-7000-8000-000000000005",
    "duration_seconds": 295,
    "size_bytes": 2457600,
    "download_url": "https://storage.example.com/recordings/...?X-Amz-Expires=3600",
    "expires_at": "2026-06-27T11:06:00.000Z"
  }
}

Every webhook delivery includes the following request headers:

Header	Description
`X-Sautikit-Signature`	HMAC-SHA256 of the raw body, hex-encoded. Verify with your subscription secret.
`X-Sautikit-Idempotency-Key`	Unique delivery ID for deduplication.
`X-Sautikit-Event`	Literal event kind: `call.recording.ready`.

At-least-once: The dispatcher may deliver the same event more than once. Deduplicate using event_id or the X-Sautikit-Idempotency-Key header.
Retry schedule: Up to 5 attempts with exponential backoff (1-2-4-8-16 seconds). After exhausting attempts the delivery row moves to dead_letter.
Timeout: Your endpoint must respond within 10 seconds. A non-2xx response or timeout counts as a failed attempt.

import { createHmac } from "node:crypto";
 
export async function POST(req) {
  const sig = req.headers["x-sautikit-signature"];
  const body = await req.text();
  const expected = createHmac("sha256", process.env.WEBHOOK_SECRET)
    .update(body)
    .digest("hex");
  if (sig !== expected) return new Response("Forbidden", { status: 403 });
 
  const event = JSON.parse(body);
  if (event.kind === "call.recording.ready") {
    const { call_id, download_url, expires_at } = event.data;
    // download before expires_at, then store in your own bucket
    console.log(`Recording for call ${call_id} ready: ${download_url} (expires ${expires_at})`);
  }
  return new Response("OK", { status: 200 });
}

Configure voice_callback_url / events_url on the Numbers Routing tab.
Fetch recording metadata via GET /v1/calls/{id}/recording.
See Storage tier docs for retention policy details.

{
  "kind": "call.recording.ready",
  "event_id": "01900000-0000-7000-8000-000000000001",
  "workspace_id": "01900000-0000-7000-8000-000000000002",
  "occurred_at": "2026-06-27T10:06:00.000Z",
  "data": {
    "call_id": "01900000-0000-7000-8000-000000000003",
    "number_id": "01900000-0000-7000-8000-000000000004",
    "recording_id": "01900000-0000-7000-8000-000000000005",
    "duration_seconds": 295,
    "size_bytes": 2457600,
    "download_url": "https://storage.example.com/recordings/...?X-Amz-Expires=3600",
    "expires_at": "2026-06-27T11:06:00.000Z"
  }
}

Header

Description

X-Sautikit-Signature

HMAC-SHA256 of the raw body, hex-encoded. Verify with your subscription secret.

X-Sautikit-Idempotency-Key

Unique delivery ID for deduplication.

X-Sautikit-Event

Literal event kind: call.recording.ready.

At-least-once: The dispatcher may deliver the same event more than once. Deduplicate using event_id or the X-Sautikit-Idempotency-Key header.

Retry schedule: Up to 5 attempts with exponential backoff (1-2-4-8-16 seconds). After exhausting attempts the delivery row moves to dead_letter.

Timeout: Your endpoint must respond within 10 seconds. A non-2xx response or timeout counts as a failed attempt.

import { createHmac } from "node:crypto";
 
export async function POST(req) {
  const sig = req.headers["x-sautikit-signature"];
  const body = await req.text();
  const expected = createHmac("sha256", process.env.WEBHOOK_SECRET)
    .update(body)
    .digest("hex");
  if (sig !== expected) return new Response("Forbidden", { status: 403 });
 
  const event = JSON.parse(body);
  if (event.kind === "call.recording.ready") {
    const { call_id, download_url, expires_at } = event.data;
    // download before expires_at, then store in your own bucket
    console.log(`Recording for call ${call_id} ready: ${download_url} (expires ${expires_at})`);
  }
  return new Response("OK", { status: 200 });
}