Matomo API in Ruby
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EFF Matomo

The EFF Matomo gem provides utilities for integrating our Ruby applications with our analytics tool, Matomo.


Add this line to your application's Gemfile:

gem 'eff_matomo', require 'matomo'

And then execute:

$ bundle

Or install it yourself as:

$ gem install eff_matomo



This gem reads two environment variables:

  • MATOMO_SITE_ID: The ID in Matomo of the app being tracked. Required.
  • MATOMO_BASE_URL: The URL where Matomo is being hosted. Defaults to "".

Adding the Matomo tracking embed to a Rails app

Add <%= matomo_tracking_embed %> to the footer of your application layout template.

Displaying Matomo data

This gem provides allows users to import site usage data from Matomo to display in their application. It currently supports two types of data:

Referrers show how users are reaching the application. Usage example:

# Get the top five referrers for the site
referrers =

# Scope referrers by date range
referrers = Matomo::Referrer.where(start_date: - 1.month, end_date:

# Only show referrers for a certain page within the app
referrers = Matomo::Referrer.where(path: "/action/my-important-action")

# Access information about each referrer
referrers.each() do |referrer|
  puts referrer.label             # eg. ""
  puts referrer.visits            # Number of times a visit came from this referrer
  puts referrer.actions_per_visit # Average number of actions that occurred during a visit

Visited Pages show the top pages within the application, both in terms of unique page views and overall number of hits. Usage example:

# Get the top pages under a certain path, for example under "/articles"
pages = Matomo::Page.under_path("/articles")

# Access information about each page
pages.each() do |page|
  puts page.label # eg. "/harm-reduction"
  puts page.path # eg. "/acticles/harm-reduction"
  puts page.hits # Overall number of hits on the page
  puts page.visits # The number of distinct visits to the page

# Get views for a certain page, grouped by day
# Return format eg. { "2018-10-03": <Matomo::Page>, "2018-10-04": <Matomo::Page>, etc. }
pages = Matomo::Page.group_by_day("/articles/harm-reduction",
                                      start_date: - 1.month, end_date:


After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


The gem is available as open source under the terms of the MIT License.