Client libraries and SDKs
Official client libraries
Client libraries wrap the Marketing API in the idioms of your language, so you can work with audiences, campaigns, and reports without hand-rolling requests. Each is generated from the same specification as the API reference, so every endpoint is covered. Pick a language for installation and examples on GitHub.
Mobile SDK
The Mailchimp Mobile SDK implements a mobile-oriented subset of the Marketing API for iOS and Android, so your app can add contacts to an audience, update them, and log in-app events. See the Mobile SDK documentation for installation, initialization, and reference.
Source repositories: Mailchimp-SDK-iOS and Mailchimp-SDK-Android.
Other Mailchimp APIs
Building against Mailchimp Transactional as well? Its client libraries are listed on the Tools page, alongside everything above.