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POST
Messenger only lets a business answer a person who wrote first. So this endpoint replies in a conversation (conversationId) and can’t start one. You can reply within 24 hours of the contact’s last message. After that, the send is refused with 403 until they write again. Plans with Messenger (Pro and up) can use this endpoint. On other plans it returns 403.
Every send checks Do Not Disturb (DND) first. If the contact has DND on, the send is refused with 403 and nothing is sent. If DND can’t be checked, the send is refused too.
string
Workspace UUID (required for account API keys, optional for workspace API keys)
string
required
Reply in this conversation. It must be a Messenger conversation in the workspace.
string
required
The text

When messageId is null

Sometimes the message goes out but Nedzo can’t save it. The answer is still 201, and messageId is null. The contact got the message, so don’t send it again. Then conversationId is the conversation you sent into. If that conversation had ended, the message may have gone out on a new thread that does not show in the log.

Errors