The REST API (Representational State Transfer) is a web services API based on the URI. It conforms to all the architectural style constraints and allows business users to download and run the code with ease, using JavaScript and HTTP protocols. On the other hand, SOAP (Simple Object Access Protocol) is its protocol. SOAP can get more complex in terms of security and messaging.

Understanding the REST API Security

Most APIs are HTTP protocol-based, which makes it essential to secure the API from fake and fraudulent users. Several web users have integrated the website with the security system to protect the data. There are two things to keep in mind when talking about REST API security.

Understanding the REST API Security


It is a process that api manager assures the business owner that the users accessing the REST API are who they claim to be. In this process, the user logins to the web with a username and password or security tokens provided beforehand. It ensures that the company's web access does not fall into the wrong hands.

REST API commonly uses security methods like:

  • Cookie-based authentication

  • Token-based authentication

  • OpenID

  • Third-party access like (OAuth, API token)

  • SAML to access multiple applications with a single login credential

For a web application only, cookies (XSRF, JWT, and XSS) and token-based authentications work well. If you consider securing the REST API for web applications and mobile access, token authentication is the best option.


It is a set of rules that determines the user's activity. It restricts the users from performing certain actions and keeps track of what a user does. Without authorization, any user can easily access the system and delete any sensitive information on purpose or by accident. Authorization prevents this from happening. So, it is important to consider both factors using API security tools.

Understanding The SOAP Security

SOAP security is a messaging protocol that prevents unauthorized users from accessing messages that contain user information through api gateway. Usually, it is achieved using the WS (Web Standard) security. As cyber security has become the top concern for every renowned company, it has become necessary to ensure that web API security stays intact and prevents malware attacks and fraudulent activities.

The WS security consists of a set of principles that provide confidentiality and certain authentication processes to ensure that the SOAP security is tight. WS security includes passwords, digital signatures, and encryption. SOAP security protects sensitive data by integrating security with the API infrastructure in end-to-end api management.

Difference Between REST API Security vs SOAP Security

While SOAP API is its Protocol, rest api management is an Architectural Style The SOAP API makes use of the service interface, and the REST API uses URIs (Uniform Resource Identifiers). SOAP API is designed according to the functionalities that the API exposes. The SOAP API is an XML-based protocol that enables the communication between two or more users. The SOAP API's sole concern is to prevent unauthorized users from accessing sensitive information in the messages. On the other hand, REST API is HTTP-based. It uses HTTP to request and access data, which can be used to GET, PUT, POST, and DELETE different types of data types.

Difference Between REST API Security vs SOAP API Security

REST API Accesses Resource Data, Whereas SOAP API Performs the Operation

REST API offers a plethora of data formats like HTML, XML, JSON, and plain text. It accesses data when you enter the URL and select the HTTP method for GET, POST, or PATCH. It sends numerous responses to the REST API, which accesses the resource data. Whereas, SOAP API is limited to only XML. The data format includes the SOAP envelope, header, and body. SOAP API helps create, recover, and delete previous records like passwords, customer information, and leads.

SOAP API Requires More Bandwidth, But REST API Only Requires URL as a Resource

Although SOAP API has an envelope-style of payload transport, REST API is a web service that does not require many resources. SOAP API requests require a considerable amount of bandwidth as it contains more volume of data compared to the REST API. As a result, more bandwidth can incur more unnecessary traffic.

The Security Method Is Different In Both APIs

SOAP API supports Web Services security, WSS, which is ideal for integration with enterprise-level API security tools. It also supports the SSL (Secure Sockets Layer) for end-to-end encryption. It is enterprise-level protection, which is not present in the REST API security.

Some common ways of securing the REST API are:

  • Authentication and authorization

  • Always use HTTPS

  • User-machine-generated API keys

  • OAuth 2.0 to secure a wide number of REST APIs

  • OpenID, an open-source authentication protocol

The best practices for WSS are:

  • Keeping track of auditing and logging management

  • Keeping track of phone calls to the web service

  • Avoiding adding sensitive information

  • Maintaining a proper authentication

  • Tracking the overall business operation

REST API supports HTTP protocol and HTTPS. Both APIs use SSL to protect sensitive data. However, WS security offers an additional layer of security in the SOAP API to ensure that the right server only reads the message content.

REST API Calls Can Be Cached, But SOAP API Calls Cannot Be Cached

Caching the data means that it can be reused in the future without sending another request to the server. REST APIs require you to implement the cache method to ensure scalability and performance go hand-in-hand. The SOAP APIs requests are sent through the POST request, and it is likely that the responses to not be cached at the HTTP level.

REST And SOAP API Handle The App Payload In A Different Way

REST API uses HTTP and JSON to lighten the payload of your application. However, SOAP API only uses XML, which makes it more challenging and complex. SOAP API has a strict communication policy that is tightly coupled with the server compared to the lightweight REST API. On the other hand, REST API offers a higher level of security between the two technologies, which makes it convenient to update and make changes while also maintaining good interaction with the clients.

Methods Of API Security Testing

API security testing plays a major role in ensuring that the API remains secured and under load. It provides confidentiality, availability, and integrity of the data and resources. Some of the best-advanced security methods to secure APIs are:

  • Run tests using specific API testing tools

  • Create test cases

  • Authentication and authorization

  • Having a resource-level of access control over the APIs

  • Conduct regular API security tests and automation of the process at an early stage

  • Use API security tools to integrate with the existing workflow

  • Run dynamic API security tests to mitigate vulnerabilities

  • Run static API security tests to check the code and identify the root cause

  • Use software composition analysis to capture open-source vulnerabilities and remove bugs

  • Conduct invalid inputs from an API as an untrusted source to check the agility

  • Try injection attacks to see if the API rejects the requests

  • Alter the parameters to see if the API sense-checks and validates them

  • Check the server access controls

  • Have a tight and confidential password management

  • Send unhandled HTTP requests to ensure unnecessary methods are not allowed on the server

Summing It Up

When it comes to determining the right API for web services, business users prefer the REST API security method unless the enterprise-level application demands tight security provided by SOAP API. REST API offers lightweight communication using HTTP protocols and small payloads like the JSON data format. It enhances the use of caching and requires fewer resources. However, SOAP API offers enterprise-level security, which should be integrated with the legacy system using SOAP.

In conclusion, whatever technology you prefer to choose, the key to it is developing a feasible API using the best and easy practices and security tools. The API platform developed by 500apps helps you connect with multiple APIs through a single API. The application enables you to boost your delivery speed and provides advanced levels of API security for your application development. For more information on API security tools and tricks, visit the 500apps website now.

Know Why is Best for Unified API Platform?
Join the SaaS Revolution
  • All-in-One Suite of 50 apps

  • Unbelievable pricing - ₹999/user

  • 24/5 Chat, Phone and Email Support


Email Finder Author Finder Email Validator Email List Email Hunter Email Checker Email Lookup Email Extractor Email Address Finder Email Scraper Find Emails CRM Software CRM Sales CRM CRM Software Enterprise CRM Software Cloud CRM Software Sales Enablement Workflow Automation Retail CRM Call Center CRM Real Estate CRM Sales Tool SDR Software Sales Engagement Platform Sales Qualified Leads Lead Management Tool Sales Tracking Sales Automation Outbound Sales Sales Prospecting Follow Up Leads Lead Management Call Center Software Call Center Software Outbound Call Center Auto Dialer Software Dialer Call Monitoring Automatic Call Distributor Answering Machine Detection Cloud Contact Center Software Virtual Call Center Call Management Time Tracking Time Tracking Employee Monitoring Time Tracker Time Tracking Software Timesheet Employee Time Clock Employee Tracking App Timekeeping Tracking App Time Clock App Applicant Tracking System ATS Applicant Tracking System Application Tracking System Applicant Software Recruiting Software ATS System Applicant Tracking Applicant Tracker Recruitment Software Candidate Relationship Management Systems Video Interviews Assessment Management Recruitment Software Video Interview Virtual Interview Coding Interview Interview Tool Online Assessment Employment Assessment Test Position Management Hiring App HRMS Software Human Resource Management HRMS Software HR Software Payroll Software Human Resource Software Employee Onboarding HRMS HR System Employee Management Document Management AI Writer Lead Enrichment AI Email Writer Sales Pitch Writer AI LinkedIn Outreach SEO Email writer Backlink Email Writer LinkedIn Chrome Extension Opening Line Writer Lead Generation Linkedin Search Prospect Lead Generation Sales Generation Data Enrichment CRM Integrations Technology Search Search with Email Integrations Website Search OKR Tool KPI OKR Task Management Performance Review Employee Performance Evaluation Employee Review Performance Management System OKR Goals MBO Email Notifications Learning Management System LMS Elearning Enterprise Learning Management Professional Development Employee Training Learning Management System Learning Platform Asynchronous Learning Training Management Knowledge Management Chatbot Chatbot AI Chatbot Customer Service Chatbot Online Chatbot Create Chatbot Messenger Chatbot Chatbot Software Website Chatbot Software Survey Bot Bot Builder Help Desk Software Ticketing Tool User Experience Help Desk Software Ticketing System Helpdesk Ticketing System Feedback Management Service Desk Software Support Ticketing Software Helpdesk Support Software Customer Service Ticketing System Live Chat Customer Service Software Live Chat Software Live Chat App Live Chat System Website Live Chat Live Chat Tool Web Chat Software Live Chat Support Software Customer Service Tool Live Chat Service Customer Feedback Customer Feedback Survey Customer Feedback Management Software Feedback Management Tool Customer Satisfaction Survey Software Customer Feedback Management System Client Feedback Software Survey Analysis Feedback Survey Software Feedback Management System User Feedback Software Customer Onboarding Customer Success Management Onboarding Process Workflows Customer Retention Customer Journey Onboarding Checklist User Segmentation Personalization Customized Templates Popup Builder API Platform End To End API Management Unified API Control REST API Management Web API Gateway API Documentation API Management API Integration API Development Unlimited Projects API Gateway Single Sign on Authentication Software Application Management Password Management SSO Configuration SSO Single Sign-On Access Management Easy Set-Up Single Login Secure Login App Builder App Builder Platform Low Code Application Platforms Low Code Development Build Your Own App Low Code App Software Drag And Drop Builder Custom Application Low Code Platform Low Code No Code Bespoke Software App Widgets Custom Widget File Picker Playground OAuth Keys File Manager Website Monitoring Reporting Web Application Monitoring Website Monitoring App Monitoring Performance Monitor App Baseline Analysis Location Insights Alerting System Reporting Wireframe Tool Design UI UX Project Management Mock Designer Wireframe Designer Website Mockup UI Prototyping Image Library Project Management Real-Time Updates Design UI UX Website Builder Website Builder Webpage Builder Website Creator Landing Page Creator Website Maker Blog Builder Ecommerce Website Builder Website Analytics Website Development Landing Page Builder Email Marketing Email Marketing Software Bulk Email Sender Automated Email Email Campaign Systems Email Automation Software Autoresponders Email Blast Service Email Marketing Email Marketing Automation Drip Campaigns Social Media Management Instagram Post Scheduler Social Media Analytics Social Media Management Social Media Planner Social Media Calendar Social Media Scheduling Social Media Listening Social Media Monitoring Social Listening SEO Tool Keyword Tool Link Building SEO Optimizer Website Audit On-Page SEO Broken Link Checker Rank Tracker Website Grader SEO Competitor Analysis Website Recording Website Analytics Click Tracking Usability Testing Website Monitoring Mouse Tracking Visitor Recording Session Replay Conversion Funnels Website Recording Website Visitor Tracker Website Personalization Lead Generation Tool Popup Maker Lead Generation Software Popup Builder Website Personalization Software Lead Capture Software Popup Builder Lead Capture Tool Lead Generation App Website Personalization App Content Planner Content Planner AI Writer Social Media Content Planner Ai Content Writer Social Media Content Calendar Content Generator AI Blog Writer Content Marketing Software Social Media Calendar Social Media Planner Push Notification Push Notification Push Messages Push Notification Service Push Service Push Notification App Custom Notifications Mobile Push Notifications Push Notification For Website Push Notification Tool Push Notification Providers Image Personalization Email Marketing Template Countdown Clock Personalization Software Personalized Software Countdown Clock Countdown Timer In Email Personalization Tool Personalized Images Personalized Videos Conversational Chatbot PPC Management Keyword Research PPC Management PPC Marketing Keyword Finder Keyword Generator Shopping Ads Adwords Reports Keyword Research Tool Keyword Suggestion Tool Team Chat Team Chat Software Collaboration Software Team Collaboration Team Communication Online Collaboration Collaboration Tool Teamwork Collaboration Virtual Communication Team Collaboration Software Business Phone System Virtual Phone Numbers Virtual PBX Toll Free Numbers Business Phone System IVR PBX Small Business Phone System PBX System VoIP Phone Cloud Phone Video Conferencing Video Conferencing Video Call Recording Virtual Conferencing Software Virtual Meetings Virtual Meeting Platforms Virtual Conference Platforms Online Conference Platforms Video Calling Software Cloud Meetings Video Conferencing Software Email Provider Email Software Software For Emails Hosted Emails Email With Domain Custom Email Address Email Hosting Business Email Address Email Encrypted Custom Domain Email Project Management Software Project Management Task Management Project Planner Project Management Tool Task Management Software Project Planning Software Project Management App Task Management App Project Management System Project Management Software Form Builder Form Builder Survey Builder Order Forms Web Forms Form Maker Form Creator Form Designer Survey Maker Survey Creator Custom Form Appointment Scheduling Appointment Scheduling Software Appointment Scheduling System Meetings Scheduler Appointment Scheduling App Online Appointment Scheduling Online Scheduling App Appointment Scheduler Appointment Booking App Calendar Scheduler Online Scheduler Robotic Process Automation RPA Tools RPA RPA Automation Robotic Automation Software Data Scraper Web Scraper Robotic Automation Website Scraper Business Process Automation Robotic Process Automation Business Process Management Workflow Management Business Process Modelling Business Process Automation BPMN BPM Software BPM Tool Business Process Management Workflow Software Workflow Automation Business Process Mapping App Integration Workflow Software Workflow App Workflow Automation Process Automation Application Integration Data Integration Tool Workflow Management Software Data Integration Software Workflow Tool Marketing Automation Electronic Signature Signature Maker Digital Signature Software Digital Signature Pdf Signer Esign Online Signature Signature Creator Sign Documents Online Electronic Sign E Signature

Get Started with 500apps Today is a part of 500apps Infinity Suite

Please enter a valid email address
Sign Up 14-day FREE Trial