APIs finally make sense
A free, hands-on course for anyone who works with developers but doesn't write code. Understand APIs, test real endpoints, and finally speak the same language.
Start the course→Learn by doing
Throughout the course, you send real API calls and see the results instantly. No tool to install, everything happens right here. Go ahead, try this one.
Who is this for?
Product Managers
Who want to write better specs and talk to engineers with confidence.
Business teams
Who work with technical products and need to understand integrations.
Students
In tech, business, or design programs who want a head start.
Junior developers
Who can code but want the bigger picture of API design.
This course is for you if
You want to speak the same language as developers.
Endpoint, payload, REST, 401. You get the gist in meetings but you couldn’t explain it. This course fixes that.
You don’t want to install anything or write code.
Nothing to configure, no terminal to open. You learn by clicking buttons and reading real API responses, right in the browser.
You want to evaluate APIs and ask the right questions.
Compare providers, test endpoints yourself, spot good documentation. By the end, you’ll know what to look for and what to ask your engineering team.
What you’ll learn
7 chapters. About 2h40.
- 01
JSON — the language APIs speak
Learn to read and understand the data structure behind every API response.
16 min
- 02
Make your first API calls
Endpoints, requests, and responses explained in plain product language.
30 min
- 03
How APIs are designed
Databases, REST conventions, and why your engineers structure routes the way they do.
23 min
- 04
Understand authentication
API keys, tokens, and OAuth explained. Why some requests get rejected.
26 min
- 05
Read API documentation
Navigate real developer docs and quickly find the information you need.
22 min
- 06
Webhooks and real-time data
When the server calls you back. Notifications, events, and async flows.
15 min
- 07
APIs at work
Real integrations, API evaluation, testing with Postman, and talking to your team.
27 min
Built by people who get it
Made by Raphaëlle, a Product Manager with 15 years of experience, and Mathieu, a teacher and former developer. She knows what non-technical people struggle with. He knows how to explain it. Every lesson was tested on real people before going live.
You probably have questions
Do I need to know how to code?+
Not at all. If you can use a spreadsheet, you can do this.
How long does it take?+
About 2h40. You can go through it in one sitting or spread it over a week.
Why is it free?+
Understanding APIs shouldn’t cost anything. This course is free, with no account required, and it always will be.
Will I be able to build an API after this?+
That’s not the goal. You’ll understand, test, and talk about APIs with confidence. Building them is your engineers’ job.
Free, forever
This course is open-source and published under the Creative Commons BY 4.0 license. You are free to share, adapt, and use it however you like, even for your company. No catch, no paywall, no hidden agenda. Just a gift to the community.
