Rails Error Notifier is an open-source Ruby gem for Rails 6+ applications that automatically captures unhandled exceptions and sends instant notifications. It integrates with Slack, Discord, Email, and WhatsApp (Twilio) so your team is immediately alerted to production errors.

👉 RubyGems page | 👉 Source code on GitHub

• 🔥 Automatic error capturing in Rails via Rack middleware.
• 📩 Send error notifications to:
  • Slack
  • Discord
  • Email
  • WhatsApp (via Twilio API)
• ⚙️ Easy setup with Rails generator.
• 📝 Add custom context (current user, request path, environment).
• 🛡️ Safe failover (won’t crash if webhooks or configs are missing).
• 🧩 Works seamlessly with Rails 6, Rails 7, and above, and supports Ruby 2.0+.

Add this line to your Gemfile:

gem 'rails_error_notifier'

Install the gem:

bundle install

Or install manually:

gem install rails_error_notifier

Generate initializer:

bin/rails generate rails_error_notifier:install

This creates config/initializers/rails_error_notifier.rb:

RailsErrorNotifier.configure do |config|
  # Slack + Discord
  config.slack_webhook   = ENV["SLACK_WEBHOOK_URL"] # "https://hooks.slack.com/services/T000/B000/XXXX"
  config.discord_webhook = ENV["DISCORD_WEBHOOK_URL"] # "https://discord.com/api/webhooks/1234567890/abcXYZ"

  # Email
  config.error_email_to   = ENV["ERROR_EMAIL_TO"]   # e.g. "dev-team@example.com"
  config.error_email_from = ENV["ERROR_EMAIL_FROM"] # e.g. "notifier@example.com"

  # WhatsApp (via Twilio)
  config.twilio_sid   = ENV["TWILIO_SID"] #"AC1234567890abcdef1234567890abcd"
  config.twilio_token = ENV["TWILIO_TOKEN"] #"your_auth_token_here"
  config.twilio_from  = ENV["TWILIO_FROM"] #"+14155552671"
  config.twilio_to    = ENV["TWILIO_TO"] # "whatsapp:+919876543210"

  # Enable in production only
  config.enabled = !Rails.env.development? && !Rails.env.test?
end

Rails middleware will automatically send alerts for any unhandled exception.

begin
  risky_operation
rescue => e
  RailsErrorNotifier.notify(e, context: { user_id: current_user.id, path: request.path })
end

🚨 Rails Error Notifier
Message: undefined method `foo' for nil:NilClass
Context: {:user_id=>42, :path=>"/dashboard"}

⚡ Rails Error Notifier
Error: PG::ConnectionBad
Message: could not connect to server: Connection refused
Context: {:host=>"db.example.com", :env=>"production"}

Clone and setup:

git clone https://github.com/mrmalvi/rails_error_notifier.git
cd rails_error_notifier
bundle install

Run specs:

bundle exec rspec

Build gem locally:

bundle exec rake install

Release a version:

bundle exec rake release

Contributions, bug reports, and pull requests are welcome! See issues.

Released under the MIT License.

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