curl --request POST \
  --url https://api.contiguity.co/send/email \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "to": "recipient@example.com",
  "from": "sender@example.com",
  "subject": "Test Email",
  "body": "Hello, this is a test email.",
  "contentType": "text",
  "cc": "cc@example.com",
  "replyTo": "reply@example.com"
}'

{
  "message": "Successfully sent",
  "crumbs": {
    "plan": "usage",
    "quota": 12,
    "type": "email",
    "ad": false
  },
  "email_id": "em_123abc456def"
}