Send File / Media
Send an image, video, audio, or document over WhatsApp via the ChatSyncs API, using a public media URL or a media_id from Upload Media. Use when a developer asks how to send a file/image/video to a WhatsApp number.
Body
Your ChatSyncs API key (not a WhatsApp/Meta access token). Where to find it.
"API-KEY"
The WhatsApp account's phone number ID. Where to find it.
"PHONE-NUMBER-ID"
The subscriber's phone number, with country code, digits only.
"PHONE-NUMBER"
Public HTTPS URL of the file. Required if media_id isn't set.
"https://example.com/image.jpg"
A WhatsApp media ID from Upload Media or Graph. Required if media_url isn't set; requires media_type when used alone.
One of image, video, audio, document. Required when using media_id alone, or when media_url has no file extension.
Caption for an image, video, or document (not supported for audio). Falls back to message if omitted.

