Backstory

The other day isEven API made it to the frontpage of Hacker News and one commenter requested the odd version of it. Well, I present to you IsOddApi!

Implementation

The best part? It uses isEven API in the backend and inverts the answer XD

I saw this as a learning opportunity and took it. I got to use flask, a lightweight WSGI web application framework. Given the very simple nature of the API, I thought to package it all as a Docker container. You can find the codes at mitanshu7/IsOddApi and mitanshu7/IsOddApiWebsite.

The website uses The smallest Docker image to serve static websites to make it lean.

Outcome

isOdd API is a RESTful API that returns json.

API URL: https://isoddapi.onrender.com/api/

GET /isodd/<number>/

Returns whether a given number is odd. Allowed numbers depend on your API tier. See Pricing below.

URL Parameters

number: the number you want to check

Example

https://isoddapi.onrender.com/api/isodd/7/

{
  "ad": "1995 NISSAN Maxima, green, leather, loaded, CD, auto start, sunroof, 4-door, great condtion, NOT FOR SALE",
  "isodd": true
}