Quickstart: Ruby

Standard library only — net/http, json, securerandom. Nothing to install.

send.rb

require "net/http"
require "json"
require "securerandom"

uri = URI("https://api.calder.click/v1/emails")
res = Net::HTTP.post(uri, , {
  "Authorization" => "Bearer calder_sk_test_…",
  "Idempotency-Key" => SecureRandom.uuid,
})
puts res.body # {"id": "em_9f2k41xq", …}

Wrap the call with a short read timeout in production, and keep going to Idempotency.