Replying to an incoming message with a quote

Keep the original message

To quote an incoming WhatsApp message, store the original webhook payload and pass its complete key and message objects back in replyToObject when calling POST /api/send-message.

Do not remove, rebuild or edit nested fields such as messageContextInfo, deviceListMetadata, senderPn, senderLid or remoteJid. Do not construct your own contextInfo.

Build the reply

For an incoming messages.upsert webhook, build your request from the saved objects:

const incoming = webhook.data.messages;

const payload = {
    to: incoming.key.remoteJid,
    text: "Thanks! We received your message.",
    replyToObject: {
        key: incoming.key,
        message: incoming.message
    }
};

Send this payload using the session that received the message. Keep the original objects unchanged for @lid chats as well; do not rewrite their identifiers.

replyTo and replyToObject are different

replyTo accepts the integer msgId returned for a message previously sent through WasenderApi. It cannot be used to quote an incoming webhook message.

An incoming WhatsApp message ID is not a WasenderApi msgId. The message-info endpoint does not convert it into one. Use replyToObject for incoming messages.

If the quote is missing

Compare the saved webhook with your outgoing request to check for dropped or modified fields. Your application must retain the original objects needed for the quote.

For further help, contact support with your session ID, the original webhook and the send-message payload. Remove authorization headers, API keys and unrelated personal data while preserving the structure needed to diagnose the issue.