PractiTest
practitest.com › resources › what is api testing? the beginner’s guide | practitest
What is API Testing? The Beginner’s Guide | PractiTest
July 10, 2025 - The UI may have data input edits, for example, that help ensure the data passed in an API is correct and valid. However, you should test for invalid data inputs at the API level to see how invalid data is handled – not only by the API, but also by the sending and receiving components.
Inflectra
inflectra.com › Ideas › Topic › API-Testing.aspx
API Testing: What is It & How Does It Work? | Inflectra
API testing involves validating the functionality, reliability, security, and performance of the connectors between systems to determine whether they meet predetermined expectations.
Can anyone recommend an open API for testing purposes?
Restful booker API Restful-booker an API that you can use to learn more about API Testing or try out API testing tools against. Restful-booker is a Create Read Update Delete Web API that comes with authentication features and loaded with a bunch of bugs for you to explore. The API comes pre-loaded with 10 records for you to work with and resets itself every 10 minutes back to that default state. Restful-booker also comes with detailed API documentation to help get you started with your API testing straight away. More on reddit.com
17
6
October 6, 2022API testing
For API testing, I only look at response codes and response schema, but I check several kinds of scenarios. I test ranges including both value ranges and string length ranges (max, max +1, min, min -1) I test data types. (should it be a string? Send an int. etc) I omit parameters and check the right response code for optional vs required I test with authenticated and unauthenticated users I test users with and without permissions I test both true and false for bool parameters I actually pull the whole response and grab the schema from the swagger file and use a schema validator to make sure they are the same. For integration testing, I basically do front end E2E tests on the backend where it makes sense. More on reddit.com
26
43
August 7, 2024[Guide] Mastering API Testing: A Practical Roadmap for Beginners
Really appreciate you putting this guide together, super helpful and honestly felt like it came from someone who's been there lol. Would love to share something that helped our team recently, someone on Reddit actually suggested this tool called Keploy for API and integration testing, and we decided to give it a shot. Didn't expect much at first, but it turned out to be crazily good. We’ve got a small QA team and used to spend a ton of time doing manual testing. Keploy basically records API calls while you're using the app (via a Chrome extension), then turns those into test cases automatically. It seriously saved us so much time, especially during sprints. Just thought I’d share in case someone else finds it useful, definitely wasn’t on my radar until that Reddit comment, and now it’s part of our workflow. Again, loved the guide, bookmarking this one! More on reddit.com
13
27
December 27, 2024What are the best beginner-friendly tools for learning API testing?
I would suggest postman More on reddit.com
29
107
August 25, 2025What are the types of API Testing?
1. Functional Testing
2. Security Testing
3. UI Testing
4. Penetration Testing
5. Load Testing
6. Runtime/ Error Detection Testing
7. Fuzz Testing
8. Validation Testing
9. Interoperability and WS Compliance Testing
inflectra.com
inflectra.com › Ideas › Topic › API-Testing.aspx
API Testing: What is It & How Does It Work? | Inflectra
Why is API Testing Important?
The move to cloud computing has highlighted the importance of Application Programming Interfaces (APIs). With the rise in cloud applications and interconnect platforms, API testing is a necessity. Many of the services that we use every day rely on hundreds of different interconnected APIs, if any one of them fails then the service will not work!
inflectra.com
inflectra.com › Ideas › Topic › API-Testing.aspx
API Testing: What is It & How Does It Work? | Inflectra
What is an example of API testing?
In order to better understand API testing, let's consider a healthcare app that enables users to book appointments with local doctors and view lab results. It connects with healthcare providers' systems via APIs so that patients can check appointment availability, request appointments, and access their medical results.
postman.com
postman.com › home › api platform › what is api testing? a guide to testing apis
What is API Testing? A Guide to Testing APIs | Postman
05:07
How to test like a "real" API dev - YouTube
02:33:29
How Do You Perform API Testing? Hands-On REST API Testing with ...
04:48
What is API Testing? - YouTube
09:48
How Do You Test an API Manually? | API Testing Manually | API Testing ...
Session1: Introduction to API Testing
Master API Testing Beyond Postman!
Google Play
play.google.com › store › apps › details
Teste: API, Scripts & Terminal - Apps on Google Play
Teste is the first mobile app to test any type of API on the go. Including REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, HTTPS. Main features: - All types of HTTP requests: GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS, COPY, LINK, UNLINK, ...
Testim
testim.io › blog › api-testing
API Testing: A Developer's Tutorial and Complete Guide
March 31, 2025 - So what are API tests? API testing validates the functionality, behavior, and performance of web services. An API test sends an HTTP request to the service layer and then validates the response.
ReqBin
reqbin.com
Online API Testing Tool | Test Your API Online
ReqBin is an online API testing tool for REST, SOAP and HTTP APIs. Paste an endpoint URL, pick a method, and send the request from your browser — no account, no install. You get back the status code, the response time in milliseconds, and ...
Beeceptor
beeceptor.com › use cases › sample api for testing
Sample API For Testing | Beeceptor
Get access to free sample APIs for testing REST, frontend, and automation workflows. Beeceptor provides ready-to-use mock APIs and dummy endpoints for developers to experiment, debug, learn, and validate API integrations without backend setup.
Postman
postman.com › home › api platform › what is api testing? a guide to testing apis
What is API Testing? A Guide to Testing APIs | Postman
API testing is a process that confirms an API is working as expected. There are several types of API tests, and each one plays a distinct role in ensuring that the API's functionality, security, and performance remain reliable.
Published: June 29, 2021
BrowserStack
browserstack.com › home › guide › what is api testing? [types, examples & tools for 2026]
What is API Testing? [Types, Examples & Tools for 2026] | BrowserStack
May 18, 2026 - Modern applications depend on APIs to exchange data between services, applications, databases, and external platforms. API testing helps verify whether these interactions work reliably under different conditions before they affect users or business operations.
Medium
medium.com › @hsnhksrn › api-testing-post-get-put-delete-791629926799
API Testing (POST,GET,PUT,DELETE) | by Hasnah | Medium
February 26, 2019 - API testing is used to determine whether the output is well-structured and useful to another application or not, checks the response on basis of input (request) parameter, and checks how much time the API is taking to retrieve and authorise ...
JSONPlaceholder
jsonplaceholder.typicode.com
JSONPlaceholder - Free Fake REST API
JSONPlaceholder is a free online REST API that you can use whenever you need some fake data: in documentation and tutorials, in code examples, in a quick prototype, or simply to test things locally.
HTTPie
httpie.io › app
HTTPie for Web — API testing client
Start testing REST, GraphQL, and HTTP APIs from the browser in 1s. Free, no account needed.
Reddit
reddit.com › r/qualityassurance › can anyone recommend an open api for testing purposes?
r/QualityAssurance on Reddit: Can anyone recommend an open API for testing purposes?
October 6, 2022 -
The title more or less, at the moment I am learning rest sharp, but I have not found a decent open API for writing tests, something that isn't too easy nor too difficult.
Preferably with some POST and GET methods, so I can write tests for getting data I posted.
Also if anyone can link me a example of how to develop a API testing framework, how to order namespaces any such :)
Thanks in advance.
Top answer 1 of 8
7
Restful booker API Restful-booker an API that you can use to learn more about API Testing or try out API testing tools against. Restful-booker is a Create Read Update Delete Web API that comes with authentication features and loaded with a bunch of bugs for you to explore. The API comes pre-loaded with 10 records for you to work with and resets itself every 10 minutes back to that default state. Restful-booker also comes with detailed API documentation to help get you started with your API testing straight away.
2 of 8
3
Trello https://developer.atlassian.com/cloud/trello/rest/api-group-actions/ Sign up for free, you're limited to 10 boards.
Telerik
telerik.com › teststudio-apis
API Testing – Verify the Integrity of Your Web Services
API Testing is a type of functional software testing that verifies and validates the functionality, mechanics, reliability, performance and security of APIs.
Parasoft
parasoft.com › home › api testing
What Is API Testing? A Complete Guide - Parasoft
September 5, 2025 - Outside of RESTful APIs, transactions include various endpoints, for example: ... Testers test APIs that a development team produces. In addition, they test the APIs the team uses in the application, including any third-party APIs.
Yale
developers.yale.edu › how-info › how-do-i-test-apis
How do I test APIs? | Yale API Portal
Web Browser - Test APIs directly in a browser if authentication for the API is none or API key based.
freeCodeCamp
freecodecamp.org › news › rules-of-api-testing-for-beginners
API Testing Best Practices – How to Test APIs for Beginners
December 16, 2022 - Achieving this goal is not an easy task and there are many ways in which a tester can go about doing it effectively. You can conduct API testing manually or automatically, and it is often considered a part of integration testing.
StackHawk
stackhawk.com › stackhawk, inc. › tooling guides › 11 best api testing tools for 2026
Top 11 API Tools for Testing in 2026
June 17, 2026 - Compare 11 leading options for API testing tools for 2026, including StackHawk, Postman, SoapUI, and more to choose the right fit.
F5
f5.com › glossary: cybersecurity terms & definitions
What Is API Testing? | F5
July 31, 2025 - End-to-end testing, to ensure that complete, real-world workflows involving multiple APIs and systems perform as intended. The testing involves chaining requests together and confirming that each element in the process functions properly.
IBM
ibm.com › home › think › topics › api testing
What Is API Testing? | IBM
November 17, 2025 - API testing is the process of verifying that an application programming interface (API) functions as intended.