Upsert member
documentedUpdate or create a list member.
POST /lists/{list_id}/members/{subscriber_hash}Membersno implementation yet0 runsInput
dc*
Mailchimp data center (dc)
us1
list_id*
Mailchimp List ID
List ID
subscriber_hash*
Subscriber MD5 hash
MD5 hash of email
email_address*
Subscriber email address
user@example.com
first_name
First name
First name
last_name
Last name
Last name
Calls Mailchimp as you (your API key is your account); keychains.dev holds the credentials.