Add an emoji reaction to a message. Send a JSON body with the chatJid and the messageId of the target message, plus the emoji to apply. Send an empty-string emoji to remove your reaction. For group messages you may pass senderJid to identify the original sender; it is inferred from the available message history when omitted. Returns the result.

API Features

Any emoji Apply any emoji reaction to a message in a direct chat or group

Toggle off Send an empty emoji string to remove your existing reaction

Group-aware Optional senderJid disambiguates the target message's author in groups

Live API Demo

POST /api/project/whatsapp-messaging/react-message

API Response (JSON)

{}

curl -X POST 'https://api.opendata-api.com/api/project/whatsapp-messaging/react-message?key=<API_KEY>&sessionId=<sessionId>' \ -H 'Content-Type: application/json' \ -d '{"body":"{\"chatJid\":\"8613800138000@s.whatsapp.net\",\"messageId\":\"ABCD1234\",\"emoji\":\"👍\"}"}'

curl -X POST 'https://api.opendata-api.com/api/project/whatsapp-messaging/react-message?key=<API_KEY>&sessionId=<sessionId>' \
  -H 'Content-Type: application/json' \
  -d '{"body":"{\"chatJid\":\"8613800138000@s.whatsapp.net\",\"messageId\":\"ABCD1234\",\"emoji\":\"👍\"}"}'

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If you encounter API issues or need other API requirements, please contact us.

Use Cases

Acknowledge a customer message with a 👍 to signal receipt
Build interactive bots that react to commands or keywords
Mirror human-like engagement in a conversational flow

Related operations

Guides

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WhatsApp: React to a Message with an Emoji