diff --git a/include/curl_wrapper.hpp b/include/curl_wrapper.hpp
index 0daf771..73c748a 100644
--- a/include/curl_wrapper.hpp
+++ b/include/curl_wrapper.hpp
@@ -199,6 +199,13 @@ protected:
         return _curl_buffer_body;
     }
 
+    /*!
+     *  @brief  Set OAuth 2.0 Bearer Access Token.
+     *
+     *  @since  0.1.0
+     */
+    void set_access_token(const string_view access_token);
+
 private:
     CURL *_connection;
     char _curl_buffer_error[CURL_ERROR_SIZE];
diff --git a/src/connection.cpp b/src/connection.cpp
index 498384d..f74a816 100644
--- a/src/connection.cpp
+++ b/src/connection.cpp
@@ -30,6 +30,11 @@ Connection::Connection(Instance &instance)
     {
         CURLWrapper::set_proxy(proxy);
     }
+
+    if (!_instance.get_access_token().empty())
+    {
+        CURLWrapper::set_access_token(_instance.get_access_token());
+    }
 }
 
 string Connection::endpoint_to_uri(const endpoint_variant &endpoint) const
diff --git a/src/curl_wrapper.cpp b/src/curl_wrapper.cpp
index 86d3073..d7e152f 100644
--- a/src/curl_wrapper.cpp
+++ b/src/curl_wrapper.cpp
@@ -166,6 +166,33 @@ answer_type CURLWrapper::make_request(const http_method &method, string uri,
     return answer;
 }
 
+void CURLWrapper::set_access_token(const string_view access_token)
+{
+    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
+    CURLcode code{curl_easy_setopt(_connection, CURLOPT_XOAUTH2_BEARER,
+                                   access_token.data())};
+    if (code != CURLE_OK)
+    {
+        throw CURLException{code, "Could not set authorization token.",
+                _curl_buffer_error};
+    }
+
+    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
+    code = curl_easy_setopt(_connection, CURLOPT_HTTPAUTH, CURLAUTH_BEARER);
+    if (code == CURLE_NOT_BUILT_IN) // libcurl < 7.61.0.
+    {
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
+        code = curl_easy_setopt(_connection, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
+    }
+    if (code != CURLE_OK)
+    {
+        throw CURLException{code, "Could not set authorization token.",
+                _curl_buffer_error};
+    }
+
+    debuglog << "Set authorization token.\n";
+}
+
 size_t CURLWrapper::writer_body(char *data, size_t size, size_t nmemb)
 {
     if(data == nullptr)