Keplars Ruby Examples

Ruby examples for integrating Keplars email service.

gem install keplars

require 'keplars'

client = Keplars::Client.new(api_key: 'kms_your_api_key')

result = client.emails.send_instant(
  to: 'user@example.com',
  from: 'hello@yourdomain.com',
  subject: 'Hello!',
  html: '<h1>Hello World</h1>'
)

Full Sinatra demo using the official Ruby SDK. Covers transactional emails, bulk/scheduled marketing emails, webhook signature verification, and priority queue usage.

View SDK Example →

Minimal script sending a single email via raw HTTP using Ruby's standard net/http library — no SDK required.

View API Example →

Minimal script sending a single email via SMTP using Ruby's standard net/smtp library — no SDK required.

View SMTP Example →

cd sdk-example
cp .env.example .env
bundle install
ruby app.rb

Server starts on http://localhost:8080.

• Ruby 3.0+
• A Keplars API key (get one here)

• Go Examples — Gin
• Dart Examples — Shelf
• Python Examples — FastAPI
• Node.js Examples — Express

MIT