One workflow ID.
Fresh sessions.

① Create a session

curl https://api.alentra.app/v1/sessions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Idempotency-Key: order_o456" \
  -F 'workflow_id=wf_customer_onboarding' \
  -F 'metadata={"case_id":"case_4815"}' \
  -F '[email protected];type=application/pdf'

Response:
{
  "id": "sess_abc123",
  "workflow_id": "wf_customer_onboarding",
  "workflow_revision": 3,
  "url": "https://alentra.app/s/sess_abc123",
  "status": "created",
  "expires": "2026-04-26T12:34:56Z"
}

② Receive a signed webhook on every step

POST https://your-app.com/alentra-webhook
X-Alentra-Event: step.completed
X-Alentra-Timestamp: 1785088800
X-Alentra-Signature: <hmac-sha256 of timestamp.body>
X-Alentra-Delivery-Id: sess_abc123:step.completed:0

{
	"event": "step.completed",
	"delivery_id": "sess_abc123:step.completed:0",
	"data": {
    "session_id": "sess_abc123",
    "stage": 0,
    "primitive": "identify",
		"audit_id": "sess_abc123_0",
		"claims": { "first_name": "Jane", "country": "US" }
  }
}