Send reaction

Send an emoji reaction to a message

POST /message/sendReaction/:instanceName

Send reaction

cURL

curl --request POST \
  --url https://api.example.com/message/sendReaction/:instanceName \
  --header 'Content-Type: application/json' \
  --data '
{
  "key": {
    "remoteJid": "<string>",
    "fromMe": true,
    "id": "<string>"
  },
  "reaction": "<string>"
}
'

import requests

url = "https://api.example.com/message/sendReaction/:instanceName"

payload = {
    "key": {
        "remoteJid": "<string>",
        "fromMe": True,
        "id": "<string>"
    },
    "reaction": "<string>"
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    key: {remoteJid: '<string>', fromMe: true, id: '<string>'},
    reaction: '<string>'
  })
};

fetch('https://api.example.com/message/sendReaction/:instanceName', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.example.com/message/sendReaction/:instanceName",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'key' => [
        'remoteJid' => '<string>',
        'fromMe' => true,
        'id' => '<string>'
    ],
    'reaction' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.example.com/message/sendReaction/:instanceName"

	payload := strings.NewReader("{\n  \"key\": {\n    \"remoteJid\": \"<string>\",\n    \"fromMe\": true,\n    \"id\": \"<string>\"\n  },\n  \"reaction\": \"<string>\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.example.com/message/sendReaction/:instanceName")
  .header("Content-Type", "application/json")
  .body("{\n  \"key\": {\n    \"remoteJid\": \"<string>\",\n    \"fromMe\": true,\n    \"id\": \"<string>\"\n  },\n  \"reaction\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/message/sendReaction/:instanceName")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"key\": {\n    \"remoteJid\": \"<string>\",\n    \"fromMe\": true,\n    \"id\": \"<string>\"\n  },\n  \"reaction\": \"<string>\"\n}"

response = http.request(request)
puts response.read_body

200

{
  "key": {},
  "message": {}
}

Request

React to a message with an emoji. Reactions appear next to the message and are visible to all chat participants.

instanceName · string · required

Name of the instance

Body parameters

key · object · required

Message key identifying the message to react to

Show Key properties

remoteJid · string · required

Chat JID (e.g., “[e-mail]” for individual, “[e-mail]” for group)

fromMe · boolean · required

Whether the message to react to is from you (true) or from the other participant (false)

id · string · required

Message ID to react to

reaction · string · required

Emoji to react with (e.g., ”👍”, “❤️”, ”😂”). Use an empty string "" to remove a reaction.

Response

key · object

Message key information

message · object

Reaction message details

Example request

cURL

curl -X POST https://your-api.com/message/sendReaction/my-instance \
  -H "apikey: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "key": {
      "remoteJid": "[e-mail]",
      "fromMe": false,
      "id": "3EB0F2F5E6B5F5B5F5B5F5B5F5B5F5B5"
    },
    "reaction": "👍"
  }'

const response = await fetch('https://your-api.com/message/sendReaction/my-instance', {
  method: 'POST',
  headers: {
    'apikey': 'YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    key: {
      remoteJid: '[e-mail]',
      fromMe: false,
      id: '3EB0F2F5E6B5F5B5F5B5F5B5F5B5F5B5'
    },
    reaction: '👍'
  })
});

const data = await response.json();
console.log(data);

Common reactions

Add a reaction

Send any emoji as the reaction value:

{
  "key": { ...messageKey },
  "reaction": "❤️"
}

Common reactions:

• 👍 Thumbs up
• ❤️ Heart
• 😂 Laughing
• 😮 Surprised
• 😢 Sad
• 🙏 Thank you

Remove a reaction

To remove your reaction, send an empty string:

{
  "key": { ...messageKey },
  "reaction": ""
}

Getting the message key

To react to a message, you need its message key. You can obtain this from:

1. Webhook events: When you receive a message via webhook, the key object is included
2. Send message response: When you send a message, the response includes the message key
3. Message history: Retrieve messages using the chat endpoints

The message key format varies:

• Individual chats: [e-mail]
• Group chats: [e-mail]
• Business chats: number@lid (for Business API)

You can change your reaction by sending a new reaction to the same message. The previous reaction will be replaced.