diff --git a/docs/faq.rst b/docs/faq.rst
index 03c5ce54..a75e6b0a 100644
--- a/docs/faq.rst
+++ b/docs/faq.rst
@@ -60,3 +60,51 @@ setting the ``expect`` request option to ``false``:
 
     // Disable the expect header on all client requests
     $client->setConfig('defaults/expect', false)
+
+How can I add custom cURL options?
+==================================
+
+cURL offer a huge number of `customizable options <http://us1.php.net/curl_setopt>`_.
+While Guzzle normalizes many of these options across different adapters, there
+are times when you need to set custom cURL options. This can be accomplished
+by passing an associative array of cURL settings in the **curl** key of the
+**config** request option.
+
+For example, let's say you need to customize the outgoing network interface
+used with a client.
+
+.. code-block:: php
+
+    $client->get('/', [
+        'config' => [
+            'curl' => [
+                CURLOPT_INTERFACE => 'xxx.xxx.xxx.xxx'
+            ]
+        ]
+    ]);
+
+How can I add custom stream context options?
+============================================
+
+You can pass custom `stream context options <http://www.php.net/manual/en/context.php>`_
+using the **stream_context** key of the **config** request option. The
+**stream_context** array is an associative array where each key is a PHP
+transport, and each value is an associative array of transport options.
+
+For example, let's say you need to customize the outgoing network interface
+used with a client and allow self-signed certificates.
+
+.. code-block:: php
+
+    $client->get('/', [
+        'config' => [
+            'stream_context' => [
+                'ssl' => [
+                    'allow_self_signed' => true
+                ],
+                'socket' => [
+                    'bindto' => 'xxx.xxx.xxx.xxx'
+                ]
+            ]
+        ]
+    ]);
diff --git a/src/Adapter/StreamAdapter.php b/src/Adapter/StreamAdapter.php
index aa7b0d19..b6c7728c 100644
--- a/src/Adapter/StreamAdapter.php
+++ b/src/Adapter/StreamAdapter.php
@@ -3,13 +3,19 @@
 namespace GuzzleHttp\Adapter;
 
 use GuzzleHttp\Event\RequestEvents;
+use GuzzleHttp\Exception\AdapterException;
 use GuzzleHttp\Exception\RequestException;
 use GuzzleHttp\Message\MessageFactoryInterface;
 use GuzzleHttp\Message\RequestInterface;
 use GuzzleHttp\Stream;
 
 /**
- * HTTP adapter that uses PHP's HTTP stream wrapper
+ * HTTP adapter that uses PHP's HTTP stream wrapper.
+ *
+ * When using the StreamAdapter, custom stream context options can be specified
+ * using the **stream_context** option in a request's **config** option. The
+ * structure of the "stream_context" option is an associative array where each
+ * key is a transport name and each option is an associative array of options.
  */
 class StreamAdapter implements AdapterInterface
 {
@@ -286,4 +292,17 @@ class StreamAdapter implements AdapterInterface
             fwrite($value, "\n");
         };
     }
+
+    private function add_stream_context(
+        RequestInterface $request,
+        &$options,
+        $value,
+        &$params
+    ) {
+        if (!is_array($value)) {
+            throw new AdapterException('stream_context must be an array');
+        }
+
+        $options = array_replace_recursive($options, $value);
+    }
 }
diff --git a/tests/Adapter/StreamAdapterTest.php b/tests/Adapter/StreamAdapterTest.php
index 9a61d053..2c8967c6 100644
--- a/tests/Adapter/StreamAdapterTest.php
+++ b/tests/Adapter/StreamAdapterTest.php
@@ -337,4 +337,43 @@ class StreamAdapterTest extends \PHPUnit_Framework_TestCase
         $opts = stream_context_get_options($this->getStreamFromBody($body));
         $this->assertEquals($url, $opts['http']['proxy']);
     }
+
+    public function testPerformsShallowMergeOfCustomContextOptions()
+    {
+        $body = $this->getSendResult([
+            'stream' => true,
+            'config' => [
+                'stream_context' => [
+                    'http' => [
+                        'request_fulluri' => true,
+                        'method' => 'HEAD'
+                    ],
+                    'socket' => [
+                        'bindto' => '127.0.0.1:0'
+                    ],
+                    'ssl' => [
+                        'verify_peer' => false
+                    ]
+                ]
+            ]
+        ])->getBody();
+
+        $opts = stream_context_get_options($this->getStreamFromBody($body));
+        $this->assertEquals('HEAD', $opts['http']['method']);
+        $this->assertTrue($opts['http']['request_fulluri']);
+        $this->assertFalse($opts['ssl']['verify_peer']);
+        $this->assertEquals('127.0.0.1:0', $opts['socket']['bindto']);
+    }
+
+    /**
+     * @expectedException \GuzzleHttp\Exception\RequestException
+     * @expectedExceptionMessage stream_context must be an array
+     */
+    public function testEnsuresThatStreamContextIsAnArray()
+    {
+        $this->getSendResult([
+            'stream' => true,
+            'config' => ['stream_context' => 'foo']
+        ]);
+    }
 }