{"id":175735,"date":"2024-01-04T19:59:00","date_gmt":"2024-01-04T18:59:00","guid":{"rendered":"https:\/\/datascientest.com\/en\/?p=175735"},"modified":"2024-01-04T19:59:17","modified_gmt":"2024-01-04T18:59:17","slug":"api-rest-what-is-it-whats-it-for","status":"publish","type":"post","link":"https:\/\/datascientest.com\/en\/api-rest-what-is-it-whats-it-for","title":{"rendered":"API Rest: What is it? What&#8217;s it for?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"175735\" class=\"elementor elementor-175735\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2b967eb e-flex e-con-boxed e-con\" data-id=\"2b967eb\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c5c2985 elementor-widget elementor-widget-heading\" data-id=\"c5c2985\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">Today, web and mobile applications are ubiquitous in our daily lives. Companies are constantly looking for ways to improve the user experience and performance of their applications. This is where REST APIs (API for Application Programming Interface and REST for REpresentational State Transfer) come in.<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b64983d elementor-widget elementor-widget-text-editor\" data-id=\"b64983d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>REST APIs are programming interfaces that enable communication between different applications, systems and web services. They have become an essential part of modern application development, and are used in many fields.<\/p><p>Whether you&#8217;re ordering a meal online, exploring the content of your favorite streaming platform or sharing a photo on a social network, you&#8217;re interacting with a REST API.<\/p><p>In this article, we&#8217;ll take a closer look at what REST APIs are and how they work.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c5aa671 e-flex e-con-boxed e-con\" data-id=\"c5aa671\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-70271b2 elementor-widget elementor-widget-heading\" data-id=\"70271b2\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">API Rest operating principles <\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9811ffc elementor-widget elementor-widget-text-editor\" data-id=\"9811ffc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Roy Fielding first defined the principles of REST architecture in 2000. It is based on the following pillars:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c08e58 elementor-widget elementor-widget-html\" data-id=\"2c08e58\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style type=\"text\/css\">\n  .tg  {border-collapse:collapse;border-spacing:0;}\n  .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\n    overflow:hidden;padding:10px 5px;word-break:normal;}\n  .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\n    font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}\n  .tg .tg-jtou{background-color:#c0c0c0;border-color:inherit;color:#ffffff;text-align:center;vertical-align:top}\n  .tg .tg-fkky{background-color:#6434fc;border-color:inherit;color:#efefef;font-size:20px;font-weight:bold;text-align:center;\n    vertical-align:top}\n  .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top}\n<\/style>\n<table class=\"tg\" style=\"undefined;table-layout: fixed; width: 700px\">\n  <colgroup>\n    <col style=\"width: 200px\">\n    <col style=\"width: 500px\">\n  <\/colgroup>\n  <thead>\n    <tr>\n      <th class=\"tg-fkky\">Principle<\/th>\n      <th class=\"tg-fkky\">Description<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td class=\"tg-jtou\">Client-Server<\/td>\n      <td class=\"tg-0pky\">Client-server architecture, where the client sends a request to the server and waits for its response. The server processes the request and sends the response back to the client.<\/td>\n    <\/tr>\n    <tr>\n      <td class=\"tg-jtou\">Statelessness<\/td>\n      <td class=\"tg-0pky\">APIs do not store the session state on the server side. Thus, each request is treated independently.<\/td>\n    <\/tr>\n    <tr>\n      <td class=\"tg-jtou\">Caching<\/td>\n      <td class=\"tg-0pky\">Responses can be cached, eliminating some client-server interactions, improving system scalability and performance.<\/td>\n    <\/tr>\n    <tr>\n      <td class=\"tg-jtou\">Secure Transport Layer<\/td>\n      <td class=\"tg-0pky\">The secure HTTPS protocol can be used to ensure the security of data transferred between the client and the server.<\/td>\n    <\/tr>\n    <tr>\n      <td class=\"tg-jtou\">Code on Demand<\/td>\n      <td class=\"tg-0pky\">Servers can temporarily extend or modify a client's functionality by transferring executable code to it.<\/td>\n    <\/tr>\n    <tr>\n      <td class=\"tg-jtou\">Uniform Interface<\/td>\n      <td class=\"tg-0pky\">To achieve application uniformity, the following interface constraints are used:\n        <ul>\n          <li>Resource Identification<\/li>\n          <li>Resource Manipulation through Representations<\/li>\n          <li>Self-descriptive Messages<\/li>\n          <li>Hypertext as the Engine of Application State (HATEOAS)<\/li>\n        <\/ul>\n      <\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-213f452 elementor-widget elementor-widget-image\" data-id=\"213f452\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/datascientest.com\/wp-content\/uploads\/2023\/05\/image2-1.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\"><\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-69d632c elementor-align-center button-principale elementor-widget elementor-widget-button\" data-id=\"69d632c\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"https:\/\/datascientest.com\/en\/data-scientist-course\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Understanding how REST APIs work<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ae293fc e-flex e-con-boxed e-con\" data-id=\"ae293fc\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2ab5a3a elementor-widget elementor-widget-heading\" data-id=\"2ab5a3a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What is CRUD?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-73ef4a5 elementor-widget elementor-widget-text-editor\" data-id=\"73ef4a5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The CRUD principle is a method for describing the basic operations that can be performed on data from a database or API.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-59ac020 elementor-widget elementor-widget-image\" data-id=\"59ac020\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/datascientest.com\/wp-content\/uploads\/2023\/05\/image3-1.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\"><\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-146d387 elementor-widget elementor-widget-text-editor\" data-id=\"146d387\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong>CRUD stands for Create, Read, Update &amp; Delete.<\/strong> Let&#8217;s take a look at what each of these terms means:<\/p><ul><li>Create consists in <a href=\"https:\/\/datascientest.com\/en\/data-sources-understanding-the-definition-and-inner-workings\">adding new data to the data source.<\/a> For example, for a contact management application, create will add a new contact with its information (name, email, telephone, etc.).<\/li><li>Read, to <strong>retrieve existing data<\/strong> from the data source. Again in our contact management application, reading will enable the user to consult the details of saved contacts.<\/li><li><a href=\"https:\/\/datascientest.com\/en\/data-owner-everything-you-need-to-know-about-this-job\">Update, to modify existing data<\/a>. Using the same example, the user can modify the telephone number of an existing contact.<\/li><li>Delete, to delete existing data. For example, you can delete a contact from your contact list<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b974079 e-flex e-con-boxed e-con\" data-id=\"b974079\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e9a0644 elementor-widget elementor-widget-heading\" data-id=\"e9a0644\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Anatomy of a query<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d415185 elementor-widget elementor-widget-text-editor\" data-id=\"d415185\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>A query is composed of the following elements:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fd65718 elementor-widget elementor-widget-image\" data-id=\"fd65718\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/datascientest.com\/wp-content\/uploads\/2023\/05\/image4-1.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\"><\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f7e1b7b elementor-widget elementor-widget-text-editor\" data-id=\"f7e1b7b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The method can be defined as a verb that stipulates what you expect from your request, in line with the <a href=\"https:\/\/datascientest.com\/en\/crud-definition-and-operation\">CRUD principles. <\/a>The most common methods are :<\/p><ul><li><strong>GET:<\/strong> The server responds to your request by displaying the desired data. This is the Read operation<\/li><li><strong>POST:<\/strong> The server creates a new entry in the database, and notifies you of the result. This method executes a Create operation<\/li><li><strong>PUT \/ PATCH:<\/strong> These two methods update an entry in the database and notify you of the result. They perform an Update operation<\/li><li><strong>DELETE:<\/strong> Deletes an <a href=\"https:\/\/datascientest.com\/en\/refactoring-databases-and-code-comprehensive-guide-to-the-essentials\">entry from the database<\/a>, and notifies you of the result. This method performs a Delete operation<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7ef5fce elementor-widget elementor-widget-text-editor\" data-id=\"7ef5fce\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>There are others, but they are much less frequently used: <strong>HEAD, CONNECT, OPTIONS and TRACE.<\/strong><\/p><p>The base URL, or request address, is the address you wish to use to <a href=\"https:\/\/datascientest.com\/en\/api-the-path-to-seamless-integration\">access the API.<\/a><\/p><p>The endpoint is the location of the data you wish to interact with<\/p><p>Queries are a set of indications designating what you wish to obtain, in key-value form, linked by &amp;, and preceded by ?<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0892350 elementor-widget elementor-widget-text-editor\" data-id=\"0892350\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>We&#8217;ve just seen what <strong>makes up a query.<\/strong> Two important elements remain:<\/p><p>The <strong>headers<\/strong>, which are used to give additional information to the client and server. There are many header parameters, the full list of which is available on the <strong>Mozilla website.<\/strong><\/p><p>They are always in key-value form.<\/p><p>The body of the request is the result returned to you from the server. This result also includes a return code informing you of the success or failure of the request. Codes <strong>2XX indicate success, codes 4XX and 5XX indicate<\/strong> an error (e.g. 400 for an incorrect request, 404 for a resource not found, 501 for an authentication error, etc.).<\/p><p>Finally, codes 3XX indicate a URL redirect.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-82e28d8 e-flex e-con-boxed e-con\" data-id=\"82e28d8\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0bce6af elementor-widget elementor-widget-heading\" data-id=\"0bce6af\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Anatomy of a query<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0a269b8 elementor-widget elementor-widget-text-editor\" data-id=\"0a269b8\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>A query is composed of the following elements:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cb1cdf9 elementor-widget elementor-widget-image\" data-id=\"cb1cdf9\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/datascientest.com\/wp-content\/uploads\/2023\/05\/image4-1.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\"><\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-530c112 elementor-widget elementor-widget-text-editor\" data-id=\"530c112\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The method can be defined as a verb that stipulates what you expect from your request, in line with the <strong>CRUD principles<\/strong> seen above. The most common methods are:<\/p><ul><li><strong>GET:<\/strong> The server responds to your request by displaying the desired data. This is the Read operation<\/li><li><strong>POST:<\/strong> The server creates a <a href=\"https:\/\/datascientest.com\/en\/olap-everything-you-need-to-know-about-this-database-organization\">new entry in the database<\/a>, and notifies you of the result. This method executes a Create operation<\/li><li><strong>PUT \/ PATCH:<\/strong> These two methods update an entry in the database and notify you of the result. They perform an Update operation<\/li><li><strong>DELETE:<\/strong> <a href=\"https:\/\/datascientest.com\/en\/50-million-raised-to-develop-the-next-vector-databases\">Deletes an entry from the database<\/a>, and notifies you of the result. This method performs a Delete operation<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bfe7b04 elementor-widget elementor-widget-text-editor\" data-id=\"bfe7b04\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>There are others, but they are much less frequently used: HEAD, CONNECT, OPTIONS and TRACE.<\/p><p>The base URL, or request address, is the address you wish to use to <a href=\"https:\/\/datascientest.com\/en\/api-integration-in-python-databases-made-easy\">access the API.<\/a><\/p><p>The endpoint is the location of the data you wish to interact with<\/p><p>Queries are a set of indications designating what you wish to obtain, in key-value form, linked by &amp;, and preceded by ?<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fea02a2 elementor-widget elementor-widget-text-editor\" data-id=\"fea02a2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>We&#8217;ve just seen what makes up a query. Two important elements remain:<\/p><p>The headers, which are used to give additional information to the client and server. There are many header parameters, the full list of which is available on the <strong>Mozilla website<\/strong>. They are always in key-value form.<\/p><p>The <strong>body of the request<\/strong> is the result returned to you from the server. This result also includes a return code informing you of the success or failure of the request. Codes 2XX indicate success, codes 4XX and 5XX indicate an error (e.g. 400 for an incorrect request, 404 for a resource not found, 501 for an authentication error, etc.). Finally, codes 3XX indicate a URL redirect.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-140270d e-flex e-con-boxed e-con\" data-id=\"140270d\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-228b214 elementor-widget elementor-widget-heading\" data-id=\"228b214\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Authentification<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-592f245 elementor-widget elementor-widget-text-editor\" data-id=\"592f245\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>A REST web service must be able to authenticate requests before it can send a response. This authentication verifies the identity of the person making the request.<\/p><p>The most common authentication methods are as follows:<\/p><ul><li><strong>HTTP basic authentication:<\/strong> The client sends the username and password in the request header, which are then re-encoded in base64 for transmission.<\/li><li><strong>API keys:<\/strong> The server assigns you a unique key, usually a string of alphanumeric characters.<\/li><li><strong>OAuth:<\/strong> This is the most advanced level of security. The server first requests a password, then an additional token to complete the authentication process.<\/li><li>The token can also be checked at regular intervals and have a certain lifetime.<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5d76c49 e-flex e-con-boxed e-con\" data-id=\"5d76c49\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2fe250b elementor-widget elementor-widget-heading\" data-id=\"2fe250b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Conclusion<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9d8e3ea elementor-widget elementor-widget-text-editor\" data-id=\"9d8e3ea\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>This article has given you an insight into <strong>REST APIs<\/strong>, their power and scope. <strong>REST APIs<\/strong> are ubiquitous when it comes to web services and applications. We haven&#8217;t gone into the details of <strong>REST API development<\/strong> here, but the various DataScientest courses will give you an insight into this aspect.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8bda907 elementor-align-center button-principale elementor-widget elementor-widget-button\" data-id=\"8bda907\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"https:\/\/datascientest.com\/en\/data-scientist-course\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Discover our Data Science courses<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d20adc7 e-flex e-con-boxed e-con\" data-id=\"d20adc7\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-375b458 elementor-widget elementor-widget-html\" data-id=\"375b458\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [{\n    \"@type\": \"Question\",\n    \"name\": \"CRUD, what is it?\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"The CRUD principle is a method that aims to describe the basic operations that can be performed on data from a database or API.\"\n    }\n  },{\n    \"@type\": \"Question\",\n    \"name\": \"API Rest operating principles\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Client-server architecture, where the client sends a request to the server and waits for its response. The server processes the request and sends the response to the client.\"\n    }\n  },{\n    \"@type\": \"Question\",\n    \"name\": \"Authentication\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"A REST web service must be able to authenticate requests before it can send a response. This authentication verifies the identity of the person making the request.\"\n    }\n  }]\n}\n<\/script>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Today, web and mobile applications are ubiquitous in our daily lives. Companies are constantly looking for ways to improve the user experience and performance of their applications. This is where REST APIs (API for Application Programming Interface and REST for REpresentational State Transfer) come in. REST APIs are programming interfaces that enable communication between different [&hellip;]<\/p>\n","protected":false},"author":67,"featured_media":175737,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_theme","format":"standard","meta":{"content-type":"","inline_featured_image":false},"categories":[2425],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.7 (Yoast SEO v21.7) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>API Rest: What is it? What&#039;s it for?<\/title>\n<meta name=\"description\" content=\"The specific purpose of a REST API can vary depending on the context and the application it&#039;s designed for. 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