First things first, log in to your Xano account and head over to your workspace dashboard. Make sure you've got the project open where you want to set up API gateway caching.

Once you're in the project dashboard, look for the side menu and click on the "API" section. This will show you all the available API endpoints and configurations.

From the list of endpoints, pick the specific one you want to enable caching for. This will take you to the settings page for that endpoint.

On the endpoint's page, find the “Settings” tab and click on it. This is where you can set up and tweak various settings for the endpoint.

In the settings tab, look for the "Caching" option. Toggle it on to enable caching for the endpoint. Once it's on, you'll see more options related to caching.

Now, you need to set how long the cache should be valid. Enter the time in seconds, minutes, or hours, depending on how fresh you want your data. It's a balancing act between performance and data freshness.

If you want, you can set up a custom cache key. This key uniquely identifies cached responses, which is handy if you have different responses for various query parameters or headers.

After you've set everything up, click the "Save" or “Update” button to apply the changes. Your API endpoint will now cache responses based on your settings.

Make a few requests to the API endpoint to check if caching is working. You should notice a faster response time for subsequent requests that hit the cache.

Keep an eye on the performance and accuracy of your cached API responses. Based on what you see, you might need to tweak the caching duration or other settings to better fit your needs.