Search term. Matches part of the email, your customer reference (customer_id), the full name or the organisation name. Not case-sensitive. The full name is matched as first name then last name: emma smith matches, smith emma doesn't.

What to sort by: first_name, last_name, email, orders (number of orders), created (creation date) or id. id is the customer's id, not your customer_id. name sorts by last name only, like last_name. Any other value sorts by last name, without an error. Leave it out to sort by last name.

Sort direction: asc or desc. Default asc. Any other value uses asc. Also applies to the default last-name sort.