diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..463ba7e
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,32 @@
+name: Integrity check
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@master
+    
+    - name: Install PHP
+      uses: shivammathur/setup-php@master
+      with:
+        php-version: 7.4
+
+    - name: Install composer deps
+      run: |
+        composer create-project nette/code-checker temp/code-checker ^3 --no-progress
+        composer create-project nette/coding-standard temp/coding-standard ^2 --no-progress
+
+        # Install app deps
+        composer install --no-interaction --prefer-dist
+
+    # Check code checker and coding standards
+    - name: Check coding standards
+      run: |
+        php temp/code-checker/code-checker --short-arrays --strict-types --fix --no-progress
+        php temp/coding-standard/ecs check src --config temp/coding-standard/coding-standard-php71.yml
+
+    - name: Check PHPStan rules
+      run: composer phpstan
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..261eeb9
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
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+
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+
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+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
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+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..81eab18
--- /dev/null
+++ b/README.md
@@ -0,0 +1,65 @@
+MJML PHP server
+===============
+
+![Integrity check](https://github.com/baraja-core/mjml-php-server/workflows/Integrity%20check/badge.svg)
+
+Imagine you want render your [MJML template](https://mjml.io) on your private PHP server, now you can.
+
+How to install
+--------------
+
+Install this package by [Composer](https://getcomposer.org) or download manually:
+
+```shell
+composer require baraja-core/mjml-php-server
+```
+
+Your server must use `PHP 7.1` or better and installed MJML by Node modules (internal command is `/node_modules/.bin/mjml`).
+
+Server configuration
+--------------------
+
+Your server must support the [shell_exec()](https://www.php.net/manual/en/function.shell-exec.php) function and Apache or Ngnix.
+
+In your root directory of webserver please configure calling this internal logic. For instance this way (most simply solution):
+
+```php
+<?php
+
+require __DIR__ . '/src/MjmlServer.php'; // Path to this package
+
+$cacheDir = __DIR__ . '/cache'; // Or can be null
+
+(new \Baraja\Mjml\MjmlServer($cacheDir))->run();
+```
+
+Now your MJML server is configured.
+
+When you call URI `/api/v1/mjml` by HTTP request on your domain, you can render your MJML template.
+
+API usage
+---------
+
+API must be called by POST method with body parameter `template` with template.
+
+Final template will be returned by json response.
+
+Some example:
+
+Call URI `/api/v1/mjml` with parameter:
+
+![MJML API Response example](doc/mjml-api-response.png)
+
+Minimal template configuration:
+
+```html
+<mjml>
+    <mj-body>
+        <mj-section>
+            <mj-column>
+                <mj-text>Hello World</mj-text>
+            </mj-column>
+        </mj-section>
+    </mj-body>
+</mjml>
+```
\ No newline at end of file
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..e4d27a6
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,30 @@
+{
+	"name": "baraja-core/mjml-php-server",
+	"description": "Render your MJML template on custom PHP server.",
+	"homepage": "https://github.com/baraja-core/mjml-php-server",
+	"authors": [
+		{
+			"name": "Jan Barášek",
+			"homepage": "https://baraja.cz"
+		}
+	],
+	"require": {
+		"php": ">=7.1.0"
+	},
+	"require-dev": {
+		"phpstan/phpstan": "^0.12.18",
+		"tracy/tracy": "^2.7",
+		"phpstan/phpstan-nette": "^0.12.6"
+	},
+	"autoload": {
+		"classmap": [
+			"src/"
+		]
+	},
+	"scripts": {
+		"phpstan": [
+			"vendor/bin/phpstan analyse src -c phpstan.neon --level 6 --no-progress"
+		]
+	},
+	"minimum-stability": "stable"
+}
diff --git a/doc/mjml-api-response.png b/doc/mjml-api-response.png
new file mode 100644
index 0000000..bd9f7f6
Binary files /dev/null and b/doc/mjml-api-response.png differ
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..a822eec
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,4 @@
+includes:
+	- vendor/phpstan/phpstan-nette/extension.neon
+	- vendor/phpstan/phpstan-nette/rules.neon
+
diff --git a/src/MjmlServer.php b/src/MjmlServer.php
new file mode 100644
index 0000000..fcc6ffd
--- /dev/null
+++ b/src/MjmlServer.php
@@ -0,0 +1,155 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Baraja\Mjml;
+
+
+final class MjmlServer
+{
+
+	/** @var string */
+	private $cacheDir;
+
+
+	public function __construct(?string $cacheDir = null)
+	{
+		$this->cacheDir = rtrim($cacheDir ?? __DIR__ . '/../cache', '/');
+		$this->createDir($this->cacheDir);
+	}
+
+
+	public function run(): void
+	{
+		if (isset($_SERVER['REQUEST_URI']) && $_SERVER['REQUEST_URI'] === '/api/v1/mjml') {
+			header('Content-Type: application/json');
+			try {
+				echo json_encode([
+					'status' => 'ok',
+					'content' => (new self)->process($_POST['template'] ?? ''),
+				]);
+			} catch (\Throwable $e) {
+				echo json_encode([
+					'status' => 'error',
+					'message' => $e->getMessage(),
+				]);
+			}
+			die;
+		}
+	}
+
+
+	/**
+	 * @param string $template
+	 * @return string
+	 */
+	public function process(string $template): string
+	{
+		$templateContentHash = md5($template);
+		$sourceFile = $this->cacheDir . '/' . $templateContentHash . '.mjml';
+		$finalFile = $this->cacheDir . '/' . $templateContentHash . '.html';
+
+		if (\is_file($finalFile)) {
+			return $this->processReturn($finalFile);
+		}
+
+		$this->write($sourceFile, $template);
+
+		if ($this->functionIsAvailable('shell_exec') === false) {
+			throw new \RuntimeException('Function shell_exec() is disabled on this server.');
+		}
+
+		shell_exec('/node_modules/.bin/mjml ' . escapeshellarg($sourceFile) . ' > ' . escapeshellarg($finalFile));
+
+		return $this->processReturn($finalFile);
+	}
+
+
+	/**
+	 * @param string $file
+	 * @return string
+	 */
+	private function processReturn(string $file): string
+	{
+		$return = str_replace(["\r\n", "\r"], "\n", $this->read($file));
+
+		if (preg_match('/Error: ([^\n]+)/', $return, $parser)) {
+			throw new \RuntimeException($parser[1]);
+		}
+
+		return $return;
+	}
+
+
+	/**
+	 * @param string $dir
+	 * @param int $mode
+	 */
+	private function createDir(string $dir, int $mode = 0777): void
+	{
+		if (!is_dir($dir) && !@mkdir($dir, $mode, true) && !is_dir($dir)) { // @ - dir may already exist
+			throw new \RuntimeException('Unable to create directory "' . $dir . '". ' . $this->getLastError());
+		}
+	}
+
+
+	/**
+	 * @param string $file
+	 * @return string
+	 */
+	private function read(string $file): string
+	{
+		$content = @file_get_contents($file); // @ is escalated to exception
+		if ($content === false) {
+			throw new \RuntimeException("Unable to read file '$file'. " . $this->getLastError());
+		}
+
+		return $content;
+	}
+
+
+	/**
+	 * @param string $file
+	 * @param string $content
+	 * @param int|null $mode
+	 */
+	private function write(string $file, string $content, ?int $mode = 0666): void
+	{
+		$this->createDir(dirname($file));
+		if (@file_put_contents($file, $content) === false) { // @ is escalated to exception
+			throw new \RuntimeException("Unable to write file '$file'. " . $this->getLastError());
+		}
+		if ($mode !== null && !@chmod($file, $mode)) { // @ is escalated to exception
+			throw new \RuntimeException("Unable to chmod file '$file'. " . $this->getLastError());
+		}
+	}
+
+
+	/**
+	 * @return string
+	 */
+	private function getLastError(): string
+	{
+		return preg_replace('#^\w+\(.*?\): #', '', error_get_last()['message']);
+	}
+
+
+	/**
+	 * @param string $functionName
+	 * @return bool
+	 */
+	private function functionIsAvailable(string $functionName): bool
+	{
+		static $disabled;
+
+		if (\function_exists($functionName)) {
+			if ($disabled === null && \is_string($disableFunctions = ini_get('disable_functions'))) {
+				$disabled = explode(',', $disableFunctions) ?: [];
+			}
+
+			return \in_array($functionName, $disabled, true) === false;
+		}
+
+		return false;
+	}
+}
\ No newline at end of file