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API is acronym for the term Application Programming Interface. Simply put, it’s a set of tools and protocols that allow programmers to create applications that interact with other systems, regardless of programming language platforms.

Thus, it allows developers to create programs that take advantage of the resources of other applications and platforms, expanding their possibilities and functionality.

What is the API for

APIs are used to allow different applications and systems to interact and exchange data and information more efficiently and easily, regardless of their development platforms.
This can help increase productivity and efficiency, as programmers don’t have to recreate the same functionality in their own applications, but can take advantage of features already available in other systems.
Furthermore, APIs can also be used to allow different platforms and devices to interact with each other, which can be very useful in cases where it is necessary to share data between different systems.
For example, an API can be used to allow a smartphone application to communicate with a database management system, allowing users to access and modify data stored in the database from their mobile devices.

Advantages of the API

There are several advantages to using APIs in your application development projects:
  • Improves developer productivity: APIs allow programmers to take advantage of features already available in other systems, which can help them build applications faster and more efficiently.
  • Facilitates systems integration: APIs allow different applications and platforms to interact with each other more easily and efficiently, which can help simplify the systems integration process.
  • Improves security: Well-designed APIs can provide an extra layer of security on your systems, allowing data to be shared more securely across different applications and platforms.
  • Allows the creation of more powerful applications: By taking advantage of the resources available in other systems, APIs allow developers to create more powerful applications capable of performing more complex tasks.
  • Makes accessing new markets easier: By allowing your apps to integrate with other systems and platforms, APIs can help expand your apps’ reach and grow your user base.

API Disadvantages

While there are many advantages to using APIs in application development projects, there are also some disadvantages that should be considered:
  • Third-party dependency: When using APIs from other systems, you are dependent on those platforms and their availability and stability. If the platform becomes unavailable or has issues, it could negatively affect your application.
  • Security risks: APIs can pose a vulnerability on your systems as they allow other applications to access your data and resources.
  • It is important to take care when selecting and implementing APIs to ensure that they are secure and do not pose a risk to your system.
  • Costs: Using APIs may incur costs, as some platforms may charge for using their APIs. It is important to evaluate these costs and verify if the use of APIs is really viable for your project.
  • Complexity: In some cases, using APIs can make application development more complex, as you have to deal with the logic and constraints imposed by the platform providing the API. This may require more time and effort on the part of developers.

Where to start with API programming

If you want to start programming APIs, there are a few steps that can help you get started on your project:
  • Choose the programming language: There are several programming languages ​​that can be used to create APIs, such as Java, Python, C# and Ruby. Choose the language that you are most comfortable with and that meets your needs and demands.
  • Define what your API should do: Before you start programming, it’s important to have a clear idea of ​​what your API should do and what its features and functionality will be. This can help you plan your project and create a consistent and efficient structure for your API.
  • Choose a framework: There are several frameworks and libraries that can help you create APIs faster and easier. Choose a framework that is compatible with the programming language you have chosen and that offers the functionality and features you need.
  • Start coding: Now that you have a clear idea of ​​what your API is supposed to do, a programming language and a framework, it’s time to start coding. Start with the simplest parts and add new features and features as you progress through the project.
  • Test and debug your API: Before releasing your API, it’s important to test it and fix any bugs or crashes that might have occurred during development. This can help ensure that your API works correctly and provides a consistent, flawless experience for your users.

How it works in practice

In general, the operation of an API in practice involves three main steps:
  1. The developer creates an API request, which is a message that contains instructions on what the API should do.
  2. The API receives the request and executes the instructions contained in the message, processing the necessary data and performing the requested actions.
  3. After receiving the request, it returns a response to the request, which can be a set of data or an error message, depending on the result of the operation performed.
  4. These steps take place in real time, allowing different applications and systems to communicate and share data efficiently and securely.


A common example of an API is the Google Maps application programming interface (API). This API allows developers to embed the Google maps service into their own apps and websites, allowing users to view maps and get directions and directions.
api código

API código

To use this API, developers send API requests to the Google Maps server with instructions on what they want the API to do, such as display a map at a certain location or find a route between two points.
The Google Maps API then processes these requests, performs the requested actions, and returns the requested information to developers who can embed it in their applications.
The Google Maps API can also be used with the Python programming language. To do this, the developer must first install the Google Maps client library for Python using the pip package manager:
pip install googlemaps
Then the developer must create a Google developer account and get an API key. With the API key in hand, the developer can send API requests to the Google Maps server using the Google Maps Client Library for Python. For example, the following Python code can be used to display a map of New York City:
import googlemaps
gmaps = googlemaps.Client(key='SUA_CHAVE_DE_API')
# Obtém o objeto do mapa para exibir a cidade de Nova York
mapa = gmaps.static_map(center="Nova York, NY", zoom=12, size="600x400")
# Salva o mapa em um arquivo de imagem
with open("mapa_nova_york.png", "wb") as f:
This API request will return a Google map object in image format, which can be saved to a file and embedded into a website or application by the developer. In addition, the developer can also use the Google Maps API to obtain route and direction information between two points, display markers and information balloons on a map, among other features.
In conclusion, APIs (Application Programming Interfaces) are very useful tools for application developers as they allow different applications and systems to interact and share data with each other more efficiently. They can also help improve an app’s security and privacy by allowing developers to control access to certain data and functionality.
How an API works in practice involves three main steps: the developer creates an API request, the API processes the request and performs the requested actions, and the API returns a response to the request. These processes take place in real time, allowing different applications and systems to communicate and share data efficiently and securely.
See more publications like this one about API, clicking here .

Luis Alexandre da Silva

Professor e Consultor de tecnologia em desenvolvimento de sistemas.Possui mestrado em Ciência da Computação pela UNESP (2016), especialização em Gestão Integrada de Pessoas e Sistemas de Informação pela FIB (2008) e graduação em Análise de Sistemas pela Universidade do Sagrado Coração (1997).Por fim, tem experiência em Gerenciamento de Projetos, Linguagens de Programação e Banco de Dados. Atuando principalmente nos seguintes temas: ensino, gerenciamento de projetos, ITIL, Desenvolvimento WEB e processos BPO.

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