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Extension Packages

Extensions allow you to add extra functionality to EspoCRM. They can be installed by Administrator panel under Customization section.

How to create extension package

A File structure of package:

  • /manifest.json – a file that contains extension properties;
  • /files – a directory that contains the extension files;
  • /scripts – contains the extension scripts.


 "name": "Extension Name",
 "version": "1.0.0",
 "acceptableVersions": [
 "releaseDate": "2015-10-15",
 "author": "Your Name",
 "description": "Description of your extension",
 "delete": []
  • Syntax of version and acceptableVersions is described by the v2.0.0 specification found at http://semver.org.
  • delete - is the list of core files that need to be deleted. This parameter is not recommended to use. You can omit it.


All extension files should be placed in files directory. They will be copied to EspoCRM core directory.


For different purposes EspoCRM supports the following types of scripts. All of them should be placed in scripts directory.

  • BeforeInstall.php – a script executed before an installation process;
  • AfterInstall.php – executed once the installation process is finished;
  • BeforeUninstall.php – executed before uninstallation process;
  • AfterUninstall.php – executed once the uninstallation process is finished.


class AfterInstall
  public function run($container)
    $config = $container->get('config');

    $tabList = $config->get('tabList');
    if (!in_array('My Custom Entity', $tabList)) {
      $tabList[] = 'My Custom Entity';
      $config->set('tabList', $tabList);



At the end, we need to pack all these files into a .zip archive.