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API Design Checklist¶
Helps you review an API design against one complete checklist before it ships.

A printable tick-box checklist for API design reviews: 78 checks across naming, errors, pagination, versioning, security, reliability, observability, LLM endpoints and launch. Free.
- For
- Backend developers and reviewers
- Level
- Intermediate
- Format
- PDF · 2 pages · light + dark
- Pages
- 2
- Language
- English
- Delivery
- Instant download after you enter your email
- Licence
- Free to share unchanged, with credit
- Support
- aiwithpriyabrat@gmail.com
Who it's for¶
For: Backend developers and reviewers. Level: Intermediate.
What you get¶
| File | What it is |
|---|---|
api-design-checklist.pdf | Light version, 2 pages |
api-design-checklist-dark.pdf | Dark version, 2 pages |
Highlights
- 2-page PDF, light and dark versions
- 78 checks from naming to launch
- LLM endpoint checks
What's inside¶
- Naming, methods, request and response bodies
- Status codes, one error format, pagination and versioning
- Authentication, object-level authorisation and input safety
- Reliability, performance and observability checks
- LLM endpoint checks and a launch checklist: 78 boxes to tick
Preview and sample pages¶
Real pages rendered from the PDF.
Requirements and compatibility¶
| You need | Any PDF reader — your web browser is enough |
| Works on | Desktop, tablet and phone Light version for printing, dark version for screens |
| Format | PDF · 2 pages · light + dark |
| Pages | 2 |
| Paper size | A4 |
| Language | English |
How to use it¶
- Open the PDF in any PDF reader, including your web browser.
- Print the light version on A4 paper; use the dark version on a screen.
What's included and what's not¶
Included
- api-design-checklist.pdf
- api-design-checklist-dark.pdf
Not included
- Editable source files: the download is the PDF
Licence¶
Free downloads may be downloaded, printed and shared unchanged, with credit: keep the author's name, the website link and the footer on every page. You may not sell them, include them in a paid product, or remove or change the author credit. Full wording: Terms, section 2.
Delivery and support¶
The download starts as soon as you enter your email or continue with Google.
Support: email aiwithpriyabrat@gmail.com or use the contact page. We reply within 2 working days (Monday–Friday).
FAQ¶
Is it really free?
Yes. Enter your email (or continue with Google) and the download starts straight away. No payment and no account. You'll get an occasional email about new free notes and cheat sheets; unsubscribe any time.
Which version should I download?
The light version prints well; the dark version is easier on screens. The content is the same.
Can I share it?
Yes, unchanged and with credit: keep the author's name, the website link and the footer on every page. You may not sell it or include it in a paid product.
Your next step¶
Next: REST API Design Cheat Sheet. The checklist says what to check; the cheat sheet explains each rule, with examples and status codes.
Related products¶
Free to start with: FastAPI notes (free)

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