Start batch operation
documentedBegin processing a batch operations request.
POST /batchesBatch Operationsno implementation yet0 runsInput
server_prefix*
Mailchimp server prefix (data center)
us19
list_id*
Mailchimp Audience/List ID
abcd1234
email_address*
Subscriber email address
user@example.com
Calls Mailchimp as you (your API key is your account); keychains.dev holds the credentials.