Integrate Mailchimp API to a regular form

General information for the website: I need to integrate a mailchimp API to a regular form that is not hackable
Kind of development: Customization of existing website
Num. of web pages/modules: 1
Description of every page/module:

We're trying to add the Mailchimp API - https://apidocs.mailchimp.com/ to a regular form

We want someone to share us a working code on how to integrate it inside a regular form.

The regular mailchimp redirect is not working for us.

We will only entertaining those people who knows how to add an API of Mailchimp to a regular form
Description of requirements/features: We're trying to add the Mailchimp API - https://apidocs.mailchimp.com/ to a regular form



Specific technologies required: Mailchimp
Similar urls: https://apidocs.mailchimp.com/
Extra notes:

The codes must be well tested and its not hackable.