It is possible to install Fusio either through composer or install it manually. Place the project into the www directory of the web server.


composer create-project fusio/fusio


  • Adjust the configuration file

    Open the file configuration.php in the Fusio directory and change the key psx_url to the domain pointing to the public folder. Also insert the database credentials to the psx_connection keys.

  • Execute the installation command

    The installation script inserts the Fusio database schema into the provided database. It can be executed with the following command php bin/fusio install.

  • Create administrator user

    After the installation is complete you have to create a new administrator account. Therefor you can use the following command php bin/fusio adduser. Choose as account type “Administrator”.

You can verify the installation by visiting the psx_url with a browser. You should see a API response that the installation was successful. The backend is available at /fusio/.


Alternatively it is also possible to setup a Fusio system through docker. This has the advantage that you automatically get a complete running Fusio system without configuration. This is especially great for testing and evaluation. To setup the container you have to checkout the repository and run the following command:

docker-compose up -d

This builds the Fusio system with a predefined backend account. The credentials are taken from the env variables FUSIO_BACKEND_USER, FUSIO_BACKEND_EMAIL and FUSIO_BACKEND_PW in the docker-compose.yml. If you are planing to run the container on the internet you must change these credentials.

Configure web server

It is recommended to setup a virtual host in your sites-available folder which points to the public folder of Fusio. After this you also have to change the configuration of the url i.e.:

'psx_url' => '',


<VirtualHost *:80>
    DocumentRoot /var/www/fusio/public/
    ErrorLog /var/log/apache2/fusio-error.log
    CustomLog /var/log/apache2/fusio-access.log combined

You should enable the module mod_rewrite so that the .htaccess file in the public folder is used. The htaccess contains an important rule which redirects the Authorization header to Fusio which is otherwise removed. If the .htaccess file does not work please check whether the AllowOverride directive is set correctly i.e. to All.

Javascript V8

Fusio provides an adapter which lets you write the endpoint logic in simple javascript. To use this adapter you need to install the php-v8 extension. Installation instructions are available at the php-v8 repository


There are three javascript apps which can connect to the Fusio backend API. The backend, developer and documentation app. By default they try to guess the url of the API endpoint. If an app is not working properly the problem is probably that the javascript app can not correctly determine the API endpoint url. In this case you have to adjust the url in the following files:

  • /public/fusio/index.htm
  • /public/developer/index.html
  • /public/documentation/index.html

These apps are of course optional. If you dont want to use them you could also simply delete the folder.


At the endpoint fusio/ you can login to the backend app. You should be able to login with the username (which you have entered for the adduser command) and the password which you have used. The following list covers the most login errors in case you are not able to login at the backend:

  • The javascript Backend-App uses the wrong API endpoint

    This can be tested with the browser developer console. If you login at the backend with no credentials the app should make an request to the /backend/token endpoint which should return a JSON response i.e.:

    { "error": "invalid_request", "error_description": "Credentials not available" }

    If this is the case your app is correctly configured. If this is not the case you need to adjust the endpoint url at /public/fusio/index.htm i.e.:

    var fusioUrl = "http://localhost:8080/fusio/public/index.php/";
  • Apache module mod_rewrite is not activated

    In case you use Apache as web server you must activate the module mod_rewrite so that the public/.htaccess file is used. Besides clean urls it contains an important rule which tells Apache to redirect the Authorization header to Fusio otherwise Apache will remove the header and Fusio can not authenticate the user

  • Fusio API returns an error

    In this case Fusio can probably not write to the cache/ folder. To fix the problem you have to change the folder permissions so that the user of the web server can write to the folder. If there is another error message it is maybe a bug. Please report the issue to GitHub.


There are two parts of Fusio which you can update. The backend system and the backend app. The backend app is the AngularJS application which connects to the backend api and where you configure the system. The backend system contains the actual backend code providing the backend API and the API which you create with the system.

Backend system

Fusio makes heavy use of composer. Because of that you can easily upgrade a Fusio system with the following composer command.

composer update fusio/impl

This has also the advantage that the version constraints of installed adapters are checked and in case something is incompatible composer will throw an error. It is also possible to simply replace the vendor folder with the folder from the new release. In either case you have to run the following command after you have updated the vendor folder:

php bin/fusio install

This gives Fusio the chance to adjust the database schema in case something has changed with a new release.

Backend app

To update the backend app simply replace the javascript and css files from the new release:

  • public/fusio/