diff --git a/src/Methods/Shh/Post.php b/src/Methods/Shh/Post.php
new file mode 100644
index 0000000..a4708fb
--- /dev/null
+++ b/src/Methods/Shh/Post.php
@@ -0,0 +1,64 @@
+<?php
+
+/**
+ * This file is part of web3.php package.
+ * 
+ * (c) Kuan-Cheng,Lai <alk03073135@gmail.com>
+ * 
+ * @author Peter Lai <alk03073135@gmail.com>
+ * @license MIT
+ */
+
+namespace Web3\Methods\Shh;
+
+use InvalidArgumentException;
+use Web3\Methods\EthMethod;
+use Web3\Formatters\PostFormatter;
+use Web3\Validators\PostValidator;
+
+class Post extends EthMethod
+{
+    /**
+     * validators
+     * 
+     * @var array
+     */
+    protected $validators = [
+        PostValidator::class
+    ];
+
+    /**
+     * inputFormatters
+     * 
+     * @var array
+     */
+    protected $inputFormatters = [
+        PostFormatter::class
+    ];
+
+    /**
+     * outputFormatters
+     * 
+     * @var array
+     */
+    protected $outputFormatters = [];
+
+    /**
+     * defaultValues
+     * 
+     * @var array
+     */
+    protected $defaultValues = [];
+
+    /**
+     * construct
+     * 
+     * @param string $method
+     * @param array $arguments
+     * @return void
+     */
+    // public function __construct($method='', $arguments=[])
+    // {
+    //     parent::__construct($method, $arguments);
+    // }
+}
\ No newline at end of file
diff --git a/src/Shh.php b/src/Shh.php
index 87e15e9..dd73e64 100644
--- a/src/Shh.php
+++ b/src/Shh.php
@@ -38,7 +38,7 @@ class Shh
      * @var array
      */
     private $allowedMethods = [
-        'shh_version', 'shh_newIdentity', 'shh_hasIdentity', 
+        'shh_version', 'shh_newIdentity', 'shh_hasIdentity', 'shh_post'
         // doesn't exist: 'shh_newGroup', 'shh_addToGroup'
     ];
 
diff --git a/test/unit/ShhApiTest.php b/test/unit/ShhApiTest.php
index c6567dd..3f0660d 100644
--- a/test/unit/ShhApiTest.php
+++ b/test/unit/ShhApiTest.php
@@ -138,6 +138,64 @@ class ShhApiTest extends TestCase
     //     });
     // }
 
+    /**
+     * testPost
+     * 
+     * @return void
+     */    
+    public function testPost()
+    {
+        $shh = $this->shh;
+        $fromIdentity = '';
+        $toIdentity = '';
+
+        // create fromIdentity and toIdentity to prevent unknown identity error
+        $shh->newIdentity(function ($err, $identity) use (&$fromIdentity) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
+            }
+            $fromIdentity = $identity;
+
+            $this->assertEquals(mb_strlen($identity), 132);
+        });
+        $shh->newIdentity(function ($err, $identity) use (&$toIdentity) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
+            }
+            $toIdentity = $identity;
+
+            $this->assertEquals(mb_strlen($identity), 132);
+        });
+
+        $shh->post([
+            'from' => $fromIdentity,
+            'to' => $toIdentity,
+            'topics' => ["0x776869737065722d636861742d636c69656e74", "0x4d5a695276454c39425154466b61693532"],
+            'payload' => "0x7b2274797065223a226d6",
+            'priority' => "0x64",
+            'ttl' => "0x64",
+        ], function ($err, $isSent) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
+            }
+            $this->assertTrue($isSent);
+        });
+
+        $shh->post([
+            'from' => $fromIdentity,
+            'to' => $toIdentity,
+            'topics' => ["0x776869737065722d636861742d636c69656e74", "0x4d5a695276454c39425154466b61693532"],
+            'payload' => "0x7b2274797065223a226d6",
+            'priority' => 123,
+            'ttl' => 123,
+        ], function ($err, $isSent) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
+            }
+            $this->assertTrue($isSent);
+        });
+    }
+
     /**
      * testWrongParam
      * We transform data and throw invalid argument exception