Quickstart

const BASE = 'https://api.countrystatecity.in/v1';
const headers = { 'X-CSCAPI-KEY': process.env.CSC_API_KEY };

const get = (path) => fetch(`${BASE}${path}`, { headers }).then((r) => r.json());

const countries = await get('/countries');
const states = await get('/countries/IN/states');
const cities = await get('/countries/IN/states/MH/cities');

console.log(countries.length, states.length, cities.length);

import os
import requests

BASE = "https://api.countrystatecity.in/v1"
HEADERS = {"X-CSCAPI-KEY": os.environ["CSC_API_KEY"]}

def get(path):
    return requests.get(f"{BASE}{path}", headers=HEADERS).json()

countries = get("/countries")
states = get("/countries/IN/states")
cities = get("/countries/IN/states/MH/cities")

print(len(countries), len(states), len(cities))

<?php
$base = 'https://api.countrystatecity.in/v1';
$ctx = stream_context_create(['http' => [
    'header' => 'X-CSCAPI-KEY: ' . getenv('CSC_API_KEY'),
]]);

$get = fn ($path) => json_decode(file_get_contents($base . $path, false, $ctx), true);

$countries = $get('/countries');
$states = $get('/countries/IN/states');
$cities = $get('/countries/IN/states/MH/cities');