Create a webhook

{  "id": "wh_ep_q5w8e2r7t1y4u9i3o6p0a2s5",  "projectId": "proj_tz4a98xxat96iws9zmbrgj3a",  "name": "Orders backend",  "description": null,  "url": "https://example.com/webhooks/voidhash",  "events": [    "subscription.created",    "subscription.renewed",    "purchase.refunded"  ],  "environment": "production",  "status": "active",  "consecutiveFailures": 0,  "lastSuccessAt": null,  "createdAt": "2026-03-01T10:00:00.000Z",  "secret": "whsec_..."}

{  "error": {    "type": "invalid_request",    "code": "invalid_webhook_url",    "message": "Webhook URL must point to a public address, not localhost or a private network",    "param": "url"  }}

{  "error": {    "type": "unauthenticated",    "code": "invalid_api_key",    "message": "This secret key is not valid."  }}

{  "error": {    "type": "permission_denied",    "code": "permission_denied",    "message": "Insufficient permissions."  }}

{  "error": {    "type": "not_found",    "code": "project_not_found",    "message": "There is no project proj_tz4a98xxat96iws9zmbrgj3a, or this credential cannot use it.",    "param": "projectId"  }}

{  "error": {    "type": "internal",    "code": "internal_error",    "message": "Something went wrong on our side. Try again, and contact support with the Request-Id header if it keeps failing."  }}