curl --request GET \
  --url https://api.leanrails.com/v1/checkout_links/{id} \
  --header 'Authorization: Basic <encoded-value>'

{
  "id": "cl_xxx",
  "object": "checkout_link",
  "active": true,
  "mode": "payment",
  "url": "<string>",
  "title": "<string>",
  "currency": "<string>",
  "livemode": true,
  "created": 123,
  "description": "<string>",
  "after_completion": {
    "type": "redirect",
    "redirect": {
      "url": "<string>"
    },
    "hosted_confirmation": {
      "custom_message": "<string>"
    }
  },
  "billing_address_collection": "auto",
  "metadata": {},
  "custom_fields": [
    {}
  ],
  "custom_text": {},
  "inactive_message": "<string>",
  "payment_method_types": [
    "<string>"
  ],
  "allow_promotion_codes": true,
  "restrictions": {
    "completed_sessions": {
      "limit": 2
    }
  },
  "submit_type": "auto"
}