v2
latestOpenAPI 3.1.02026-08-01302833.9 KBUnified Agent APIs
Unified Send Message
Unified messaging.
Send a message via SMS or WhatsApp. Default channel is 'auto', which sends via SMS. Set channel='whatsapp' to use WhatsApp explicitly.
WhatsApp opt-in requirement: WhatsApp Business API only delivers free-form messages to recipients who have messaged your Business number within the last 24 hours. Without prior opt-in, Meta accepts the API call and returns a message ID, but silently drops the message. SMS has no such restriction and delivers reliably.
post/v1/messages/send
Request body
Response
Successful Response
{"stackTrail":"paths:/v1/messages/send:post:responses:200:content:application/json:schema","oasType":"schema","type":"unknown"}