curl --request GET \
  --url https://spotify-api31.p.rapidapi.com/api/v1/playlists/tracks \
  --header 'x-rapidapi-key: <api-key>'

import requests

url = "https://spotify-api31.p.rapidapi.com/api/v1/playlists/tracks"

headers = {"x-rapidapi-key": "<api-key>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {'x-rapidapi-key': '<api-key>'}};

fetch('https://spotify-api31.p.rapidapi.com/api/v1/playlists/tracks', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://spotify-api31.p.rapidapi.com/api/v1/playlists/tracks",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "x-rapidapi-key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://spotify-api31.p.rapidapi.com/api/v1/playlists/tracks"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("x-rapidapi-key", "<api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://spotify-api31.p.rapidapi.com/api/v1/playlists/tracks")
  .header("x-rapidapi-key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://spotify-api31.p.rapidapi.com/api/v1/playlists/tracks")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["x-rapidapi-key"] = '<api-key>'

response = http.request(request)
puts response.read_body

{
  "data": [
    {
      "id": "5ftED3IYts5K7gChGOUuHG",
      "name": "Despacito",
      "uri": "spotify:track:5ftED3IYts5K7gChGOUuHG",
      "duration": 247663,
      "artists": [
        {
          "name": "Luis Fonsi",
          "uri": "spotify:artist:4V8Sr092TqfHkfAA5fXXqG"
        }
      ],
      "contentRating": {
        "label": "NONE"
      },
      "playability": {
        "playable": true
      }
    }
  ],
  "message": "Success",
  "statusCode": 200,
  "pagination": {
    "total": 100,
    "hasMore": true,
    "continuation": "CDsQ8FsiEwje95_F1pmRAxXlsykDHUX"
  }
}

{
  "message": "Bad request"
}

{
  "message": "Invalid API key"
}

{
  "message": "You are not subscribed to this API, please subscribe before using"
}

{
  "success": false,
  "message": "Internal Server Error",
  "status_code": 500,
  "cost": 0,
  "explain": "Internal Server Error"
}