Currently list endpoint also expects limit and page query arguments as well. i.e. this should work (although, I didn’t test it)
/api/notifications/list?page=0&limit=100
Although, it would be probably better if it defaulted to some value or provide a better error message. Anyways created an issue for tracking it storagenode/console/consoleapi: list endpoint arguments page and limit should be optional · Issue #6865 · storj/storj · GitHub