# Making Requests # Authentication To make requests to the API, you need to include an authentication token in the headers of your request. This token is provided when you register on the developer portal. The header should look like this: ```http X-Api-Key: YOUR_API_KEY_HERE ``` # Content-Type All requests to the API should include the `Content-Type` header to specify the format of the data being sent. We only use JSON format for requests and responses. ```http Content-Type: application/json ``` ## API Endpoints - Sandbox API: `https://api-xenia-cisandbox.staysitu.com/external-api/v1` - Production API: `https://api-xenia.staysitu.com/external-api/v1`