add_site_image
This function lets you add an image to your site.
 site_id int optional
Site ID (required only when using a metasite API key)
 image_url string required
URL of the image
 title string optional
Optional image title
 method string required
must be set to 
add_site_image language string optional
by specifying a 2-letter (ISO 639-1) language code (all capital letters e.g. EN, DE, FR, ES, IT) you can change the language of the text values returned
 api_key string required
your API key - 
Click here to get your key. If your API key uses a hash key, you must also include the parameters 
hash_key and hash_timestamp.
 id int
Unique ID of the photo
Click here to test this function in the API playground.