diff --git a/readme.md b/readme.md
index 4f20ff4..ab87ee2 100644
--- a/readme.md
+++ b/readme.md
@@ -90,17 +90,24 @@ Expected settings are as follows:
 ```php
 use Noweh\TwitterApi\Client;
 
-$settings['account_id']
-$settings['access_token'],
-$settings['access_token_secret'],
-$settings['consumer_key'],
-$settings['consumer_secret'],
-$settings['bearer_token'],
-$settings['free_mode'] = false; // Optional
+$settings = [
+    'account_id' => 'YOUR_ACCOUNT_ID',
+    'access_token' => 'YOUR_ACCESS_TOKEN',
+    'access_token_secret' => 'YOUR_TOKEN_SECRET',
+    'consumer_key' => 'YOUR_CONSUMER_KEY',
+    'consumer_secret' => 'YOUR_CONSUMER_SECRET',
+    'bearer_token' => 'YOUR_BEARER_TOKEN',
+    'free_mode' => false, // Optional
+    'api_base_uri' => 'https://api.twitter.com/2/', // Optional
+]; 
 
 $client = new Client($settings);
 ```
 
+By changing the value of `'api_base_uri'` you can have the requests target a different server, for instance, a simulated one, thus making testing your application in isolation easier.
+
+For a quick mock server setup you can use [mockoon](https://mockoon.com/).
+
 ### API Functionality
 All API calls are triggered when the `performRequest()` method is invoked.
 Depending on the context, this method can either be empty or contain data that will be sent as PostData (refer to examples of each call below).
diff --git a/src/AbstractController.php b/src/AbstractController.php
index e819024..cb8e2fc 100644
--- a/src/AbstractController.php
+++ b/src/AbstractController.php
@@ -62,6 +62,9 @@ abstract class AbstractController
     /** @var array<string> $post_body */
     protected array $post_body = [];
 
+    /** @var string> $baseUri */
+    private string $api_base_uri;
+
     /**
      * Creates object. Requires an array of settings.
      * @param array<string> $settings
@@ -74,6 +77,12 @@ public function __construct(array $settings)
         $this->parseSettings($settings);
     }
 
+    private function getAPIBaseURI(): string
+    {
+        return $this->api_base_uri;
+    }
+    
+
     /**
      * Perform the request to Twitter API
      * @param array<string, mixed> $postData
@@ -90,7 +99,7 @@ public function performRequest(array $postData = [], $withHeaders = false)
 
             if ($this->auth_mode === 0) { // Bearer Token
                 // Inject the Bearer token header
-                $client = new Client(['base_uri' => self::API_BASE_URI]);
+                $client = new Client(['base_uri' => $this->getAPIBaseURI()]);
                 $headers['Authorization'] = 'Bearer ' . $this->bearer_token;
             } elseif ($this->auth_mode === 1) { // OAuth 1.0a User Context
                 // Insert Oauth1 middleware
@@ -103,7 +112,7 @@ public function performRequest(array $postData = [], $withHeaders = false)
                 ]);
                 $stack->push($middleware);
                 $client = new Client([
-                    'base_uri' => self::API_BASE_URI,
+                    'base_uri' => $this->getAPIBaseURI(),
                     'handler' => $stack,
                     'auth' => 'oauth'
                 ]);
@@ -205,6 +214,7 @@ private function parseSettings(array $settings): void
         $this->access_token = $settings['access_token'];
         $this->access_token_secret = $settings['access_token_secret'];
         $this->free_mode = $settings['free_mode'] ?? false;
+        $this->api_base_uri = $settings['api_base_uri'] ?? self::API_BASE_URI;
     }
 
     /**