The document discusses application programming interfaces (APIs), covering their definition, typology, types, usability, and protocols, particularly focusing on open APIs. It outlines the advantages of public, private, and partner APIs, as well as the skills required for frontend and backend developers. The conclusion emphasizes the importance of APIs in enhancing productivity and allowing communication between different software systems.

1. PREPARED By:
Saad Alsubaie
SUPERVISOR:
Dr. Khalid Nazim
API (Application Programming interface)
2022/2023
winter Semester

2. Contents
1. Introduction
2. API Definition
3. API Typology
4. Types of API
5. Usability of WEB APIs
6. Types of API protocols
7. Open API
8. Frontend Developer Vs. Backend Developer
9. Conclusion
10. Reference

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The unsung hero of our connected world is the
application programming interface or API.
Since API becomes more usable, this leads to think
how to make it flexible and easier.
Open API is the idea that the engineers end up with it.
Here is some explanation about the concept of open
API, the history and how to use it.
Introduction

4. API Definition
API is a set of rules and specifications
that a software program can follow to
access services provided by another
software program.
It serves as an interface between
different software programs and
facilitates their interaction, similar to
the way computers interact with each
other in a human-computer interface.

5. API
Typology
Public APIS allow companies to
publicly expose information and
functionalities.
Public APIs Private APIs Partner APIs
Advantages
• Delegated R&D .
• Increased reach,
traffic.
• New revenue stream.
Advantages
• Rationalized
infrastructure
• Reduced costs
• Increased flexibility
• Improved internal
operations
Advantages
• Value-added service
• Up sell
• Must have for
business partners
Partner APIS are used to facilitate
communication and integration of
software.
used internally facilitate the
integration of different applications
and systems used by a company.

6. Types of
API
Local API
is the original form of API
which is the OS APIs that
provide services to
application programs
Program API
is based on RPC (Remote
Procedure Call)technology
that making a remote
program execution from
another servers.
Web API
also known as Web
Service, is
application/device
communicate to each
others via World Wide
Web (HTTP architecture).

7. • Photos can be shared from sites like Flickr and Photobucket to
social network sites like Facebook and MySpace.
• Content can be dynamically posted. Sharing live comments
made on Twitter with a Facebook account.
• Content can be embedded, e.g. embedding a presentation from
SlideShare on a LinkedIn profile.
Usability of WEB APIs

8. Types of API protocols
SOAP (Simple Object Access
Protocol)
Simple Object Access Protocol (SOAPI) is a protocol
for exchange of structured information on a
decentralized and distributed platform using XML
(eXtensible Markup Language).
REST (Representational State
Transfer)
supports many format (JSON, XML,
etc)and doesn’t employ any additional
messaging layer.

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An open API means
 Open API does not mean free! “Open” Means “As Open as You’d Like”
 Openly documented
 Available via self-service (i.e. developers can sign up on a website, get an API key, with no hassle)
 And using open Internet technologies (SOAP, REST, RSS).
 An open API provider creates the infrastructure and then each partner does the technical, business and legal
work on their end.
 The Open API provider does the partnership work once, partners need only onboard themselves.
Open API

10. Open API
Legal Considerations
Like in any
business,
platform
providers should
ensure due
diligence on the
legal side of the
API.
These are some
of the legal
problems that
could spring up
while opening up
the API for a
platform.
No Copyright
EU : The Court holds
that neither the
functionality of a
computer program nor
the programming
language and the
format of data files
used in a computer
program .
US : So long as the
specific code used to
implement a method is
different, anyone is free
under the Copyright
Act to write his or her
own code.

11. Parameter Frontend Backend
Skillsets HTML, CSS, and JavaScript. The database, Server, API, etc.
Team • Front-end developers design the
• look of the website.
• Back-end developers develop an application that supports
the frontend.
Stand-alone Service • Front-end development service can’t be offered
independently.
• Back end development can be offered as an independent
service in the form of BaaS.
Goal
• Front-end developers should make sure that the
website is accessible to all users, and it remains
responsive in all views – mobile and desktop.
• The back-end team may need to create an application
around the front-end and support it. Moreover, they need
to make sure that the website opens up and functioning
properly.
Average Salary $104,405 per year $120,798 per year
Most popular tools jQuery, HTML5 MySQL, PHP

12. Conclusion We conclude from APIs their definition ,
usage , and the ability to increase
productivity.
The main objective is to provide a list of
functions completely independent of the
mechanism in which they were
implemented, to allow others to
communicate with them through any other
mechanism.

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 https://medium.com/microservices-learning/the-evolution-of-distributedsystems-fec4d35beffd
 https://slideplayer.com/slide/14475822/
 https://www.ibm.com/cloud/learn/api
 https://www.slideshare.net/bepeduapuluh5/api-docs-55101503
 https://frontendmasters.com/guides/front-end-handbook/2018/what-is-a- FD.html
 https://www.guru99.com/what-is-backend-developer.html
Reference