> ## Documentation Index
> Fetch the complete documentation index at: https://docs.appsignal.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Padrino

[Padrino](http://www.padrinorb.com/) applications are officially supported. Instrumenting Padrino applications requires some manual setup. Follow the installation steps in AppSignal, starting by clicking 'Add app' on the [accounts screen](https://appsignal.com/accounts).

<Note>
  Is your application using a combination of Rails, Grape, Hanami, Padrino or Sinatra? Follow our guide for [instrumenting multiple Rack applications](/ruby/integrations/rack-libraries).
</Note>

## Installation

After installing the AppSignal gem, add the AppSignal integration after requiring `padrino`.

<CodeGroup>
  ```ruby Ruby theme={null}
  # config/boot.rb
  require "rubygems" unless defined?(Gem)
  require "bundler/setup"
  require "appsignal" # Add this require

  # Load the Padrino integration
  Appsignal.load(:padrino)
  # Start AppSignal
  Appsignal.start

  # For Ruby gem 3.11 and older
  require "appsignal/integrations/padrino" # Add this line
  ```
</CodeGroup>

Then, create the AppSignal configuration file. For more details on configuring AppSignal, see the [Ruby configuration](/ruby/configuration) page.

After these steps, start your Sinatra app and wait for data to arrive in AppSignal.