When you learn WordPress HTTP API, you’ll see so many possibilities around, because you can use HTTP API to interact with any external service’s API (no matter, Facebook, MailChimp or some sort of currency converter) or even with another WordPress website!

MailChimp Webhooks API – both PHP and WordPress integrations

Batches in MailChimp API

Interacting with Twitter API in WordPress: How to get your favorite tweets

WooCommerce REST API – Create Products with Attributes

WooCommerce REST API – Create, Update or Remove Products

REST API – Create, Update or Delete posts using Basic Auth and HTTP API

Begin with REST API – Display others blogs latest posts

Weather Forecast Widget / Shortcode

MailChimp API 3.0 – Get All List Members

FaceBook login for WordPress

3 Ways of Getting Shares for URL using Facebook 3.0 API

MailChimp API 3.0 Working with Interest Groups

MailChimp API 3.0 and WordPress HTTP API

How to connect Instagram API using wp_remote_get() function in WordPress