First things first, head over to the Xano dashboard. Find the API endpoint you want to tweak the quotas and rate limits for. Click on that endpoint to dive into its settings.

Next, go to the "Middleware" section. Hit the "Add Middleware" button to create something new. Give it a name that makes sense, like "Rate Limit Middleware."

Now, in your "Rate Limit Middleware," you'll need to add some logic to keep track of how many requests a user makes. This might include:

• Checking request metadata to figure out who the user is
• Looking at a database or in-memory store to count how many requests this user has made in a certain time period.

Set up the quota and the time frame for your rate limits. For instance, you might allow 100 requests per user per hour. Store this info in a persistent storage or an in-memory cache like Redis.

Head back to your API endpoint settings and apply the "Rate Limit Middleware" to the endpoints you want to protect. This way, every request to these endpoints will be checked against your rate limit logic.

In your "Rate Limit Middleware" logic, add a condition to handle cases where a user goes over their quota. You could return an HTTP 429 (Too Many Requests) status code with a clear message saying they've hit their limit.

Keep an eye on how your rate limiting is performing. Make tweaks to the quotas, time frames, and logic as needed to keep things running smoothly and ensure a good user experience.