Unamed parameters end up in the parameter map

[gameldar]

You can define a path without naming the parameters e.g. /api/* or /api/:/something

The value at that position is parsed and then stored in the parameters and can be retrieved using an empty string match.params[""]

Conceptually unnamed parameters makes sense where you want to match the path but don't need a capture group for it - however it should not store the value in the map.