Skip to main content
Session text is a free-form reply. It works only inside the 24-hour customer service window, counted from the customer’s last message. Outside that window, WhatsApp rejects it and the assistant sends an approved template instead.

​
Ask this

​
What the assistant calls

1

Find the thread

list_conversations finds the chat. Pass phoneNumberRef when the account has more than one sending number. list_conversation_messages reads that conversation id.
2

Send text

After you ask it to send, send_message uses type: text, the text body, and to with the country code. GreenTick strips formatting and validates the number before it calls WhatsApp.
Text cannot be scheduled. scheduledAt on a text message returns INVALID_SCHEDULE. A failed send was not delivered. The assistant reports the error and stops. Details are on Messages. If the window is closed, use Send an approved template.