Mailchimp Filters

gform_mailchimp_allow_resubscription

Use this filter to modify whether a user that currently has a status of unsubscribed on your list is resubscribed.

gform_mailchimp_field_value

Use this filter to modify a value before it is sent to the Mailchimp API.

gform_mailchimp_keep_existing_groups

Use this filter to modify whether a user that is already subscribed to your list has their groups replaced when submitting the form a second time.

gform_mailchimp_lists_params

This filter allows the request parameters to be modified when getting MailChimp lists.

gform_mailchimp_override_empty_fields

This filter can be used to prevent empty form fields erasing values already stored in the mapped Mailchimp MMERGE fields when updating an existing subscriber.

gform_mailchimp_request_args

This filter allows the request arguments to be modified before sent to Mailchimp.

gform_mailchimp_subscription

This filter modifies the subscription object before it is executed.

http_request_timeout

https://developer.wordpress.org/reference/hooks/http_request_timeout/.

Mailchimp Feed Meta

The Feed Object meta for the Mailchimp add-on is an associative array containing the properties which determine how the add-on should process the form submission.