Create Subscriber
Create a WhatsApp subscriber/contact via the ChatSyncs API without waiting for them to message your bot first — request parameters, GET and POST examples, and the response shapes for success, duplicate, and account-not-found cases. Use when a developer asks how to add a contact programmatically or bulk-import subscribers from their own system.
Body
Your ChatSyncs API key (not a WhatsApp/Meta access token). Where to find it.
"API-KEY"
The WhatsApp account's phone number ID to create this subscriber under. (Note: camelCase.) Where to find it.
"PHONE-NUMBER-ID"
The subscriber's name.
"NAME"
The subscriber's number, with country code and no + sign, digits only. (Note: camelCase.)
"MOBILE"

