Receiving Events

message.reaction

A reaction was added to or removed from a message.

Event payload

{
  "id": "evt_2f9c1a4b7e",
  "type": "message.reaction",
  "provider": "whatsapp",
  "account_id": "acc_8c21d0",
  "occurred_at": "2026-06-08T12:35:40Z",
  "data": {
    "conversation": { "id": "8613912345678", "type": "user" },
    "sender": { "id": "8613912345678", "type": "user", "name": "Jordan Lee" },
    "message": {
      "id": "wamid.HBgZ",
      "target_message_id": "wamid.HBgM"
    },
    "event": { "kind": "message_reaction", "reaction": "👍" }
  }
}

Notes

data.event.reaction holds the emoji — an empty string means the reaction was removed. data.message.id is the reaction itself and data.message.target_message_id points at the message being reacted to.