Web API: Web api is an object in appian by which we can expose our data to third party software and we are transferring our data from appian to third party and we have two different ways to create an web api like by selecting an option from available template and create from scratch. Integration Objects: Integration is an object by which we can communicate from different system with the help of api and there are different method we have in integration. "Web API - An external system makes a request to Appian Integration - Appian makes a request to an external system"