Introduction to APIs, Postman and API testing in 25 minutes (GET vs POST)

This video is a quick introduction to APIs and Postman in just 25 minutes. I will briefly explain what an API is and how you can call (aka consume) an API with Postman.

You will learn about the HTTP request methods (also known as HTTP verbs) like GET, POST, DELETE and how to send a JSON request body.

API Documentation (with Swagger):

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[vdespa]

👉 Want to learn more about Postman? Check my Postman online course.

[ajlozadaro]

It is the cleanest, most professional and clearest video I have seen so far. I congratulate you for the contribution.

[myself]

One hell of an tutorial. Thank You, means a lot.

[AiryFake]

I love the cat notes :) And the tutorials are very interesting..!

[utubeutube]

Great video! Very helpful. Thanks for posting.

[nargizreza]

I appreciate you for work you have done

[jplobianco]

Excelent video! Very helpful. I am loving your courses on udemy. Keep up the good work Valentin!

[staulik]

Your class is awesome, by the way: what about send-me that shirt? lol

[Andrew_OHara]

Thank you, this helped alot! Great tutorial :)

[martinvanek]

Awesome! thank you very very much! Pressing subscribe :)

[amanpathania]

@Valentin Despa: Quick question: while deleting the record, we did not give any Authorization? May I know why? Or can i say that Delete method did not need any Authorization (in this case, API with delete method can run without Authorization)

I would appreciate your response.

[gdd]

Thank you, is very helpful. I'm doing the udemy course also.
I haven't managed to get my head around the swagger docs for api's, hoping you could help please. Do these docs essentially detail all the endpoints of the api has, and are used as a reference point for using postman? Who creates these docs and do testers request it from the devs?

[meghasandesam]

Dear Valantine, Your TShirt is nice with POSTMAN Logo. do we get online from Amazon? BTW Im from India

[sharmak]

Hi Valentine, This is a good video for the starters indeed with good example. Am currently working on postman from more than a year, I have a question may be good idea to ask here and help me n community if possible. The question is, I have a collection that runs end to end in different environment in CLI using npm (Fully automated using pre requisite scrips to generate random data for each field). Now I want to dockerise it so that I can ship into Jenkins pipe line and run it in schedule. Would be great if you can make a video on this. Thanks again

[coolkostian]

Is it possible to cover a 'Negative' API test scenario in POSTMAN? I'm verifying that Error: 400 is expected and 1/2 of my test is passing and another is failing with "Failed | AssertionError: expected false to be truthty" is there any way to avoid this assertion error?

[debopriyasarkar]

1.In the first request I am generating token using basic Auth 2. In the next request, using the generated token, I am sending a request payload where I want to set like if the username, password combination (in the first request) is suppose a and b, then I want my tradingAgent field to be suppose B, else C or other combinations How can I achieve this, I am new to postman and javascripting.

My second request looks like this

"sequence": "5533",
"tradingAgent": "{{tradingAgent}}",
I understand in the pre-requisite script I have to write..but the below doesnt work..enter image description here

var username =
if (username = ("a")) (password = ("b")) pm.environment.set("tradingAgent", "B");
else
pm.environment.set("tradingAgent", "C")