Rest VS Soap API
Tags: webdev, programming, newbie, hasanelsherbiny
Published: 2023-08-02 19:10:00

in previous post we have talked about [What Is API](https://dev.to/hasanelsherbiny/what-is-api-21bc)

we have mentioned that there are two types of them, in this post will walk through the details of each type and when to use each one.

## REST API:
REST, often hailed as a more modern and lightweight approach, stands for Representational State Transfer. It is an architectural style that follows certain principles for building networked applications. REST APIs utilize standard HTTP methods (GET, POST, PUT, DELETE) to perform operations on resources, which are represented in various formats like JSON or XML.

Advantages of REST API:

a. Simplicity and Scalability: REST APIs are easy to implement and understand, making them highly scalable and flexible.

b. Stateless: Each request from the client to the server contains all the information necessary for the server to understand and process it. This statelessness simplifies server-side processing and allows better caching mechanisms.

c. Widely Supported: REST is widely supported by various programming languages and platforms, making it an accessible choice for developers.

d. Better Performance: Due to its lightweight nature and stateless communication, REST APIs typically offer better performance compared to SOAP.

When to use REST API:

REST is suitable for scenarios where simplicity, scalability, and performance are crucial factors.
When building mobile applications, Single Page Applications (SPAs), or any resource-based application where CRUD (Create, Read, Update, Delete) operations are predominant.
For projects with limited resources, such as small to medium-sized applications or startups.


## SOAP API:
SOAP, which stands for Simple Object Access Protocol, is a messaging protocol that uses XML for data exchange. Unlike REST, SOAP is a standardized protocol with strict rules and specifications. It employs a more complex structure, using XML to define the request and response messages.

Advantages of SOAP API:

a. Reliability: SOAP provides built-in error handling and supports ACID (Atomicity, Consistency, Isolation, Durability) transactions, ensuring data integrity.

b. Security: SOAP incorporates WS-Security standards, providing a higher level of security for message transmission.

c. Language and Platform Agnostic: SOAP's reliance on XML makes it compatible with different programming languages and platforms.

When to use SOAP API:

When working in enterprise-level environments where security, reliability, and transaction support are critical.
For scenarios where a standardized and formal contract between client and server is essential, particularly in situations where multiple parties are involved.
When integrating with legacy systems that are designed around SOAP-based communication.


## Conclusion:

Choosing between REST API and SOAP API depends on the specific needs and requirements of your project. REST API is favored for its simplicity, scalability, and wide support, making it ideal for resource-based applications and scenarios where performance is crucial. On the other hand, SOAP API is well-suited for enterprise-level applications that demand robust security, reliable transactions, and standardized contracts.

Ultimately, understanding the strengths and weaknesses of each API type will enable developers to make informed decisions when building applications and ensure that the chosen API aligns perfectly with the project's goals and objectives.