You can read all the contacts from Xero without passing any filters. However, to get only the filtered response results, you can add the following filters as "queryParameters" as shown in the below example.

Learn how to use API filters to effectively retrieve filtered contact data from Xero in this document. Discover the various filters available, including order, page, includeArchived, IDs, and where, and explore an example code snippet showcasing their imp

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Param Name	Type	Description
order	String	Order by any element returned
page	String	Up to 100 contacts will be returned per call when the page parameter is used. e.g. page=1
includeArchived	Boolean	e.g. includeArchived=true Contacts with a status of ARCHIVED will be included in the response
IDs	String	Filter by a comma-separated list of ContactIDs. Allows you to retrieve a specific set of contacts in a single call.
where	String	Filter using the where parameter. We recommend you limit filtering to the optimised elements only.

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Example: