automation.action

.md

Event POST <your callback URL>

An automation reached a notify step for a contact - your product's turn to act (create a follow-up, alert the bursar...). data is what you put on the step.

Verify every callback

Check X-PaalChat-Signature on the raw body, reject timestamps older than 5 minutes, and de-duplicate on X-PaalChat-Delivery. Answer 2xx within 10 seconds. See Webhooks and callbacks.

Headers

X-PaalChat-Event string

X-PaalChat-Delivery string

Unique per event (equals body id). De-duplicate on it.

Format uuid.

X-PaalChat-Signature string

t=<unix seconds>,v1=<hex HMAC-SHA256(secret, "<t>.<raw body>")>. Reject if invalid or older than 300 seconds.

Pattern ^t=\d+,v1=[a-f0-9]{64}$.

Body

id string

Equals X-PaalChat-Delivery.

Format uuid.

sandbox boolean

true for sandbox businesses (test keys) - nothing reached WhatsApp.

event any

Always automation.action.

occurred_at string

Format date-time.

business object

external_id string business.external_id

data object

automation_id integer data.automation_id

run_id integer data.run_id

contact_id integer data.contact_id

contact_external_id string | null data.contact_external_id

conversation_id integer | null data.conversation_id

data object data.data

The notify step's own data.

// routes/api.php: Route::post('/paalchat/callback', PaalChatCallbackController::class); public function __invoke(Request $request) { $header = (string) $request->header('X-PaalChat-Signature'); $raw = $request->getContent(); if (! preg_match('/^t=(\d+),v1=([a-f0-9]{64})$/', $header, $m) || abs(time() - (int) $m[1]) > 300 || ! hash_equals(hash_hmac('sha256', $m[1].'.'.$raw, config('services.paalchat.callback_secret')), $m[2])) { abort(401); } // Process each delivery once. if (! Cache::add('paalchat:'.$request->header('X-PaalChat-Delivery'), true, now()->addDays(2))) { return response()->noContent(); } $event = json_decode($raw, true); if ($event['event'] === 'automation.action') { FollowUp::create(['paalchat_contact_id' => $event['data']['contact_id'], 'details' => $event['data']['data']]); } return response()->noContent(); }

{ "id": "2e3f4a5b-6c7d-4e8f-9a0b-1c2d3e4f5a6b", "event": "automation.action", "occurred_at": "2026-11-02T08:00:04+00:00", "business": {"external_id": "presec"}, "sandbox": false, "data": { "automation_id": 3, "run_id": 881, "contact_id": 41, "contact_external_id": "parent-77", "conversation_id": 7, "data": {"reason": "fees_overdue"} } }