Preview a WhatsApp reply window

Calculate the 24-hour service-window boundary from an inbound timestamp and proposed reply timestamp with UTC offsets. This does not approve a template, establish consent, calculate a provider bill or send a message.

Opening this form does not run the check.

Example JSON request

{
  "last_inbound_at": "2026-10-24T12:00:00+02:00",
  "proposed_reply_at": "2026-10-25T11:30:00+01:00",
  "display_timezone": "Europe/Warsaw"
}

Supported fields and limits (JSON Schema)

{
  "additionalProperties": false,
  "properties": {
    "last_inbound_at": {
      "maxLength": 50,
      "minLength": 1,
      "title": "Last Inbound At",
      "type": "string"
    },
    "proposed_reply_at": {
      "maxLength": 50,
      "minLength": 1,
      "title": "Proposed Reply At",
      "type": "string"
    },
    "display_timezone": {
      "default": "UTC",
      "maxLength": 80,
      "minLength": 1,
      "title": "Display Timezone",
      "type": "string"
    }
  },
  "required": [
    "last_inbound_at",
    "proposed_reply_at"
  ],
  "title": "WhatsAppWindowInput",
  "type": "object"
}

Tool version: public-whatsapp-window-v1