Lets say I would like to filter on customers with a particular id through the following URL:

https://api.company.com/api/customers?id=5

But now I also want to include customers with other id's in this filter as well. So I would expect I would do something like:

https://api.company.com/api/customers?id=[5|15|7]

Where the result should be to return the customers that have either the idea 5, 15 or 7.

Does anyone have an idea how I could make this work? Is a custom filter the only way?