We have an application with a frontend that is uniquely deployed for each customer using Netlify. When a user hits the URL they will always provide a query parameter called
token. This token is used by the application to make an API call to our backend. If no token is present, an error is reported in the backend.
What we’re seeing is that there are about 1% of calls coming through without the token query parameter and we’ve spent weeks trying to work out how this occurs without coming up with anything concrete.
We sometimes see this happen after a deployment because Netlify shows a preview of the website in the console, so what we’re wondering is if it’s possible that Netlify is also doing some kind of ping of the URL for availability purposes? If so, is it possible to configure what is sent so we can include a test token to prevent the errors?