curl --request POST \
  --url https://api.leanrails.com/v1/checkout_links \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <idempotency-key>' \
  --data '
{
  "line_items": [
    {
      "quantity": 2,
      "price": "<string>",
      "price_data": {
        "currency": "<string>",
        "product": "<string>",
        "unit_amount": 1,
        "tax_behavior": "inclusive"
      }
    }
  ],
  "title": "<string>",
  "mode": "payment",
  "description": "<string>",
  "currency": "<string>",
  "after_completion": {
    "type": "redirect",
    "redirect": {
      "url": "<string>"
    },
    "hosted_confirmation": {
      "custom_message": "<string>"
    }
  },
  "billing_address_collection": "auto",
  "metadata": {},
  "inactive_message": "<string>",
  "payment_method_types": [
    "<string>"
  ],
  "allow_promotion_codes": false,
  "restrictions": {
    "completed_sessions": {
      "limit": 2
    }
  },
  "submit_type": "auto"
}
'

{
  "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"
}