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                     MULESOFT
WHAT ARE THE THREE TYPES OF 
APIS IN MULESOFT?
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Introduction
 In MuleSoft, the three types of APIs follow the API-led connectivity 
approach. Each type has a distinct role in the overall architecture, and 
together they help build scalable, reusable, and manageable integration 
solutions.
 MuleSoft is a leading integration platform for connecting applications, data, and 
devices.
 It enables organizations to build application networks using APIs.
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What is API-Led Connectivity?
 API-led connectivity is a methodology for connecting data 
to applications through reusable and purposeful APIs.
 It organizes APIs into three distinct layers: System, 
Process, and Experience.
 Key Principles
 Decouples systems for greater flexibility and reuse.
 Promotes modular, scalable architecture.
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Why API-Led Architecture?
 API-led architecture offers a structured and reusable approach to 
integration that improves the speed, flexibility, and scalability of 
development. 
 By organizing APIs into layers—System, Process, and Experience—it 
enables teams to decouple systems and work independently. This modular 
design allows for faster development, easier maintenance, and the ability 
to scale solutions without disrupting the entire system.
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Overview of the 3 API Types
i. Experience API
ii. Process API
iii. System API
iv. Brief one-liner for each
In MuleSoft’s API-led connectivity approach, there are three core types of APIs: 
System APIs, Process APIs, and Experience APIs. Each plays a specific role in the 
architecture. System APIs provide direct access to backend systems like 
databases, ERPs, or legacy applications, abstracting their complexity. 
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Experience APIs – Introduction
 Experience APIs are the top layer in the API-led connectivity model. Their main 
role is to deliver information in a format tailored to the needs of specific users, 
channels, or applications. These APIs focus on customizing and presenting data 
for a particular audience, such as a mobile app, web portal, or third-party 
partner. By separating the presentation layer from the business logic and system 
integration.
 APIs (Application Programming Interfaces) allow different software systems to 
communicate.
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Experience APIs – Use Case
 Scenario: A Retail E-Commerce Platform
 Challenge: The retail company wants to provide different 
experiences for customers, partners, and internal users through a 
mobile app, a web portal, and a partner API.
 Solution: Mobile App (CustomeExperience): The Experience API 
delivers personalized product recommendations, order status.
 MuleSoft uses an API-led connectivity approach to build 
integrations.
 It breaks down integration into three reusable layers: 
System, Process, and Experience APIs.
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Process APIs – Introduction
 Role: Orchestrate business processes by combining and transforming data 
from multiple systems.
 Data Transformation: Process APIs shape and process data from System 
APIs to serve specific business needs.
 Business Logic: They implement business rules and logic to align data with 
organizational requirements.
 Integration: Facilitate complex integrations across multiple systems, ensuring 
that data is consistent and accurate.
 Key Purpose: Provide a reusable, decoupled layer between backend systems 
(System APIs) and user-facing interfaces (Experience APIs).
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Process APIs – Use Case
 Scenario: A Healthcare System
 Challenge: A healthcare organization needs to integrate multiple 
systems: electronic health records (EHR), patient management 
systems, insurance databases, and appointment scheduling systems. 
They want to create a unified "Patient Summary" view for doctors 
and healthcare providers.
 Rocess API can play a crucial role in integrating data from multiple 
systems such as electronic health records (EHR), patient management, 
insurance databases, and appointment scheduling
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