Second Edition (PDF Book)

Second Edition of our complete, hands-on, and easy to digest .NET 8 program that gets you from zero to building production-ready APIs in just a few weeks. 

Ultimate ASP.NET Core Web API – Second is by far the best resource (#1 in all Web Development on Gumroad) on building APIs in .NET. With our help, you’ll be able to absorb the materials at 3x the speed, AND you’ll have fun doing it.


Why Learn ASP.NET Core Web API?

Why should you invest your time and money into this program?

Ever since .NET Core 1.0 was introduced, the whole .NET ecosystem seems to have been given a new life. The framework has been revitalized and now with the .NET 8, it has become a force to be reckoned with.

Not many technologies achieve this level of polish, stability, maturity, and speed. Creating a flexible yet stable technology is quite a feat, and that’s exactly what ASP.NET Core developers have achieved.

On top of that, REST APIs have become a defacto standard in the industry because of their ability to decouple backend and frontend parts of the application and the ability to serve thousands of clients simultaneously.

But you already know all that. Let us ask you something:

  • Did you have trouble finding a job in web development?
  • Have you been frustrated by your lack of understanding of APIs?
  • Do you feel you’re struggling to get your head around a lot of REST concepts?
  • Do you think you should earn more money?

If your answer is “yes” to any of these questions, then this is the right book and program for you.

We’ve been there. We know how to help you.

We strongly suggest you read all the content on this page. This will provide enough information for you to know what you are buying, what we cover in our books, and what we don’t. Also, you can find the table of contents for each book and some preview chapters of the main book. Of course, if you want to go straight away to the pricing table, you can do that here.

“Excellent book!”

“This is great content created by the Code Maze team. Everything you need to know about the best practices to become a better software developer. The guide will cover all necessary areas required to start a new project, covering topics such as project start-up, logging, database modeling, and repository pattern, REST, security and much more!
I recommend Code Maze’s authority on delivering high-level software development guidance!”

Ray Carneiro

Former Microsoft MVP, Senior Cloud Solution Architect, Microsoft

What’s inside



























































After helping more than 4000 readers through comments and emails, we’ve compiled bonus materials to help you absorb the material even faster.

Bonus #1

From Complete Noob to Six-Figure Backend Developer (Worth: $15)


  Workbook’s main goal is to continue building on everything you’ve learned from our main book. That way you can maintain and improve your knowledge and achieve your goal of Mastering ASP.NET Core Web API. You have to understand, the key to success is to put into practice everything you learn and to improve your understanding of the topic. This workbook provides exactly that for you.  

Bonus #2

Practice and Learn with Ease on Real World Projects

(Worth: $10)

Practical Postman Collection!

To make it even easier for you we made a JSON request collection that you can use to practice the knowledge and skills that you learned in our program. By Practicing on Real-World Examples, you’re making sure that you’re getting the most experienced and practical skills that can be used as an advantage on your future projects.

Bonus #3

Everything that you need to be Combined to Make your Learning as Easy and Efficient as Possible!

(Worth: $10)



The HTTP Reference Tables is a bonus material that will help you develop your API more quickly. We compiled everything related to HTTP so you don’t ever need to search the internet for a status code or anything else related to HTTP inside your API. By using this ebook, you’re going to save a lot of time and be more efficient.

Bonus #4

Changing the Way You Plan, Build and Deliver Applications

(Worth: $27)


Docker is one of the greatest innovations that happened in the last few years. It has opened new horizons in software development and it spun off many innovative solutions and projects. Docker images and containers are rapidly becoming THE way to do software development. 

Our main goal will be to show off the tremendous power of Docker and ASP.NET Core when combined.

Bonus #5

How to Use the Full Potential of Freelancing from your Bedroom (or Office)

(Worth: $13)

Freelancing Unleashed

When we started to write our Ultimate ASP.NET Core Web API book, we had one idea in our heads. How can we help our readers even more? Starting a career in software development can be hard. Being a junior developer is hard, too. But what about being your own boss and making more money than on a corporate job? In this bonus material, we help you discover is freelancing really for you and how to maximize the opportunity of freelancing platforms.

Bonus #6


IdentityServer 4/Duende, OpenID Connect,
OAuth2 and ASP.NET Core Identity for User Management

(Worth: $37)



Security is important and we all know it. But due to its implementation complexity, security is usually put off to the end of the development cycle, and sometimes even neglected.

So make sure your application is secure and tight, and make use of the mechanisms ASP.NET Core provides.

Bonus #7

Implementing Dapper ORM in 

(Worth: $25)


We’ve received a lot of feedback about our main book and a lot of developer said they would love to have an alternative
way to develop without using Entity Framework Core.

So, we’ve heard you, and here’s an extra bonus
that can help you use your favorite ORM – Dapper.

dapper book cover

Bonus #8

Surround Yourself with Like-Minded People Who are on the Same Path as You

(Worth: $$$ – depends on you)

Private Facebook Community

Join an energetic community of developers on the same wavelength as you. A developer is lonely when you’re surrounded by “normal people” who just don’t get it. Get inspired, ask questions, generate ideas, make friends and have fun!

“Taking REST API to another level”

“Interested in building your first REST API with ASP.NET Core, but you have no experience with ASP.NET Core whatsoever? Look no further than this book! The guys from Code Maze did an excellent job of packing a plethora of information in 400 pages book, that would get you on the right track. After reading, you’ll gain enough knowledge to tackle the creation of your own, production-ready, REST API. Two thumbs up and kudos to Code Maze team! :slightly_smiling_face:

Miroslav Popovic

Technical Lead, Dev Community Leader, Conference Speaker, Seavus

From Developers to Developers…!

‘Ultimate ASP.NET Core Web API’ and all of its Bundle Bonuses are designed to help you excel your Career and Life

Vladimir Pecanac

Hi, my name is Vladimir Pecanac, and I am a full-time .NET developer and DevOps enthusiast. I founded this blog so I can share the things I learn in the hope of both helping others and acquiring more knowledge on the topics I write about.

I feel that many technical articles are written in an unnecessarily complicated way to sound more authoritative and serious. My goal is to challenge that trend and write down-to-earth, simple articles that are easy to read and understand.

The best way to learn is to teach.

Marinko Spasojevic

Hi, my name is Marinko Spasojevic. Currently, I work as a full-time .NET, ASP.NET CORE, ANGULAR, and BLAZOR developer and my passion is web application development.

Just getting something to work is not enough for me. To make it just how I like it, it must be readable, reusable, and easy to maintain.

Prior to being an author on the Code Maze blog, I had been working as a professor of Computer Science for several years. So, sharing knowledge while working as a full-time developer comes naturally to me.

My hope is that the experience and knowledge I share will help you improve your own.

Is There A Guarantee?


Before you make a purchase, please visit and inspect the Table of Contents section. You can find several preview sections as well. 

Also, once purchased, if you want to make sure the books are good enough for you, you should read and check them online

We strongly believe in quality, and that by the time you completely finish the book, you will have a complete ASP.NET Core knowledge and a solid understanding of the core fundamentals of API development.

If for some reason you don’t feel like that is true, then you will receive a full refund (100% of the money you invested in our bundle) within 30 days (7 days for team licenses) from the day of the purchase.

Pretty simple. No questions asked.

“Quality Materials on Everything Involving .NET”

I’ve been working in Brazil with systems development for 25 years, and with .NET since its launch.

Over the years I’ve always looked for quality materials on best practices and everything involving .NET, until I came across the materials on the Code Maze website. If you’ve had any contact with the free materials made available on the Code Maze website, you can be sure that the paid content is of equal or better quality, and worth every penny.

I had already invested in the first version of this material, as well as the material about Blazor, and now I decided to invest in the second version of ASP.NET Core. As I already imagined, based on what I’ve read so far, it’s already been worth the investment.

The folks at Code Maze deserve congratulations!


Software Engineer

“Almost 400 Pages of Content Right to the Point”

Previously, when I bought the first version, I started to think about how much had changed with this new version, and looking in detail, the changes are brutal!

If you have purchased the first version and are still not sure about investing in this new version, I recommend it, it is worth every dollar. You will save many hours of watching videos, reading documentation, and trying different solutions until you get to the right one.

Almost 400 pages of content right to the point, no irrelevant content. The best thing apart from the content is the price, it can’t be beaten.

Isaac Zarzuri

QA Automation Tester and Web Developer at Encora

“Worthy investment”

“I cannot say enough good things about this book, and the bonus features. It is almost like having someone over your shoulder telling you what to do. The writing is clear and consistent, easy to follow, and just plain fun. Every topic is there. I can’t even imagine the hours that would need to be spent to get all of this information. I highly recommend it. If you can make only one investment this year, this is it. “

Paul Speranza

.NET Consultant, ASG Software Services, Inc.

“I’ve been waiting for this book for a long time!”

“It’s been four years that I am working as a Software Engineer. Basically during this time, I got to know what I have to learn to make a consistent career. Luckily I stumbled upon “Code Maze” while doing Google searches. I started to follow this site from the very beginning and I felt like that finally got something that I was seeking for. Then one day I saw they launched a book regarding the “Ultimate ASP.NET Core Web API” program with a bunch of bonuses. I read the book contents where I found everything I need to achieve my goals. Most importantly I just want to mention that ‌I got intense support from the book author Marinko Spasojevic. The man who debugs my code and gives solutions whenever  I face difficulties. Yeah, it’s a long and true story. Lastly, I just want to say I know what I am learning and I know I am with the right community.

Shahed Ahmed

Software Engineer, Azolution Software and Engineers Limited

“Extraordinary .NET and C# source of code and knowledge”

“I love your vision and perception of simplicity and pragmatism. Code Maze is an excellent place for getting the latest best practices related to the web development world. Explanations followed by hands-on activities and code descriptions are the best way to learn and apply the knowledge and skills in further or undergoing projects. Just keep the ball rolling, you rock guys!”

Miodrag Cekikj

Technical Lead, Speaker, Softelligence

“Avoided months of trial and error”

“With a real REST Web API, there is a lot MORE than what meets the eyes than building basic CRUD operations. You will find this out AFTER you go into production and see how fast that Web API you wrote, falls apart.
Welcome to “ULTIMATE ASP.NET CORE WEB API”. This is a COMPLETE book and source code that takes you through from A to Z steps, in proper order, that you need to build a full-fledged and complete Web API project structure that you can then add all your entities, DTOs, Endpoints and etc. to it.
What I did in one week with this book, saved me months of trial and error to get everything working properly.
I won’t go into the details of what this book offers, you can read them on their website, but for a small fee, you will save a lot of time, mistakes, and money. That’s it!
The premium plan gives you a lot more value, as you get several other books, like security, docker and etc.
Ah, and the BEST support from the authors.
Good luck and see you there…”

Ben Hayat

Software Engineer & Architect, Micro Intelligence Corp - Sarasota, Florida

“Got my money back in time saved”

I’m an iOS/Android developer and need to build backends to support my apps. There were a lot of recommended books teaching ASP.NET Core MVC but I only wanted a Web API. Sadly, I wasted time and money on bloated materials before discovering this book which is exactly the style I prefer. It’s more practical and makes for a great reference when building products.
Initially, I bought the basic pack but upgraded soon after to access the Facebook group. I’ve found having a support community invaluable when learning anything new and the authors answer member questions frequently.

Sam Shearing

App Developer, Mayon Digital Pty Ltd

“High-quality book from Code Maze authors”

“A book that you’ll want to have in your hands while working on any .NET Core Web API related project! The book has simple explanations and examples that can actually be applied on a project, unlike most of the examples I’ve seen in other books.

It is amazing how Code Maze authors explain some difficult topics in very simple and down-to-earth manner.

Good job guys! Highly recommended book for anyone who wants to start with .NET Core and for those who want to improve their current knowledge on the topic!”

Goran Todorovic

Senior Software Developer, Invenda

“Fills the gaps”

Ultimate ASP.NET Core Web API is the stop next to the Microsoft documentation. A step-by-step approach and detailed explanations helped me with all the blurry things I have left with after reading the documentation. From beginning to end, from project creation to deployment. If we add the fact that I got access to the private community and even more content by purchasing the Premium edition, buying this package has been an excellent choice. It justified the money invested 100%.

Sulejman Ferizovic

Software Engineer, TNT Soft

“Landed a Job!”

First of all, let me say a big THANK YOU! I’m a student of your Web API eBook and check this out: my study and understanding of it allowed me to get a new job for a company as a .NET backend developer.
How awesome is that!? 😀
I bought the basic version and now the premium version because it is worth every penny! Awesome eBook and awesome the way you wrote it and explained everything, I devoured it!
Rui Barreira

Software Engineer

Not Convinced Yet?

If you’re still not sure whether this is what you need, let’s have a look
at how our students have rated the materials. Ultimate ASP.NET Core Web API – Second Edition is
the #1 Product in the Web Development category on Gumroad.

gumroad stars

We value students feedback and that helps us create a perfect 5-star product
suited for both beginners and experts alike.


Which package should I buy?

That mostly depends on your budget. Obviously, the Premium package is the best value for money (saves you 40%), but the book by itself is still 400 pages of goodies that will help you build production-ready APIs.

Could I just find all this on the Internet for free?

You can certainly find a solution, but it takes time and effort as with most things nowadays. However, the internet is often full of outdated solutions and time-wasters. This program, on the other hand, contains fresh and updated information and uses the latest .NET framework (.NET 8). This means you no longer have to waste your time or money searching for a solution.

What if I don’t like it?

That would make us very sad… But if you don’t like the book or don’t find the book useful, we don’t want your money. Just reply to your purchase receipt within 30 days (7 days for team licenses) and we’ll issue a refund.

Can I get a discount?

Contact us in the chat for more information. We can provide discounts for those who have problems purchasing the program. We do offer different pricing tiers too, so you can buy the most affordable one for you.

Where can I learn more about you?

We have a lot of free content on code-maze.com. Parse through the articles and learn more about our style and content we offer for free. Then imagine this book is our content on steroids.

I still have questions…

Feel free to check out our complete FAQ. You can find more questions covered on that page. You can also email us or use the chat to the bottom left to ask us anything.

Choose a Plan Or Contact Us for More Info About the Content or Prices


All packages include .NET 6, .NET 7 and .NET 8 source code!

Interested in Team Licences? Check them out (up to 53% OFF).