Is earning from a foreign website that contains images of unveiled women permissible, knowing that I do not visit the site to view these images, but rather to seek a livelihood, and I do not invite anyone to visit it? And do I bear sin if the service requester uses it for impermissible matters?

The presence of images of unveiled women on a website does not prevent the offering of permissible services on it, and one must lower their gaze from what is forbidden. Similarly, the presence of forbidden things in a restaurant does not prevent providing it with a permissible service. However, it is forbidden to provide a service directly related to the forbidden, such as writing a menu for alcoholic beverages or creating advertisements for musical instruments.