number.provisioned

Fires when a phone number is claimed from inventory and assigned to the workspace.

2026-06-27

number.provisioned fires when a DID is claimed from inventory and assigned to the workspace. This event was previously published as number.assigned; the wire string was renamed to number.provisioned in the frontend-alignment wave. Subscriptions using the old number.assigned literal must be updated; the validator returns webhooks.event_unsupported for the old name.

This event is subscribable via workspace webhooks (POST /v1/webhooks).

{
  "kind": "number.provisioned",
  "event_id": "01900000-0000-7000-8000-000000000001",
  "workspace_id": "01900000-0000-7000-8000-000000000002",
  "occurred_at": "2026-06-27T10:00:00.000Z",
  "data": {
    "number_id": "01900000-0000-7000-8000-000000000003",
    "e164": "+254700000001",
    "country_code": "KE",
    "capabilities": ["voice", "sms"],
    "series_id": "01900000-0000-7000-8000-000000000004",
    "rental_start_at": "2026-06-27T10:00:00.000Z"
  }
}

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: `number.provisioned`.

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 === "number.provisioned") {
    const { number_id, e164, capabilities } = event.data;
    console.log(`Number provisioned: ${e164} (${number_id}), capabilities: ${capabilities.join(", ")}`);
    // update internal phone book, configure routing...
  }
  return new Response("OK", { status: 200 });
}

Subscribe via POST /v1/webhooks with events: ["number.provisioned"].
Fetch full number details via GET /v1/numbers/{id}.
Pair with number.released to track full number lifecycle.

This event is subscribable via workspace webhooks (POST /v1/webhooks).

{
  "kind": "number.provisioned",
  "event_id": "01900000-0000-7000-8000-000000000001",
  "workspace_id": "01900000-0000-7000-8000-000000000002",
  "occurred_at": "2026-06-27T10:00:00.000Z",
  "data": {
    "number_id": "01900000-0000-7000-8000-000000000003",
    "e164": "+254700000001",
    "country_code": "KE",
    "capabilities": ["voice", "sms"],
    "series_id": "01900000-0000-7000-8000-000000000004",
    "rental_start_at": "2026-06-27T10:00:00.000Z"
  }
}

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: number.provisioned.

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 === "number.provisioned") {
    const { number_id, e164, capabilities } = event.data;
    console.log(`Number provisioned: ${e164} (${number_id}), capabilities: ${capabilities.join(", ")}`);
    // update internal phone book, configure routing...
  }
  return new Response("OK", { status: 200 });
}