Find pet by ID.

const response = await fetch('/api/v3/pet/{petId}', {
  method: 'GET',
  headers: {
    'api_key': 'YOUR_API_KEY'
  }
});

const data = await response.json();
console.log(data);

import requests

headers = {
    "api_key": "YOUR_API_KEY"
}

response = requests.get("/api/v3/pet/{petId}", headers=headers)

print(response.json())

<?php
$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => '/api/v3/pet/{petId}',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_CUSTOMREQUEST => 'GET',
  CURLOPT_HTTPHEADER => [
  'api_key: YOUR_API_KEY'
  ],
]);

$response = curl_exec($curl);
curl_close($curl);

echo $response;

using System.Net.Http;

var client = new HttpClient();
var request = new HttpRequestMessage(new HttpMethod("GET"), "/api/v3/pet/{petId}");
request.Headers.Add("api_key", "YOUR_API_KEY");
var response = await client.SendAsync(request);
var body = await response.Content.ReadAsStringAsync();
Console.WriteLine(body);

import java.net.URI;
import java.net.http.*;

HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
    .uri(URI.create("/api/v3/pet/{petId}"))
    .header("api_key", "YOUR_API_KEY")
    .method("GET", HttpRequest.BodyPublishers.noBody())
    .build();

HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.body());