Web interface filters, the so-called "quick filters". For example, the filter for invoices from the last 7 days: filter[filterObdobi.datVyst]=filterPoslednich7Dni can be used in the API.
Example usage: https://demo.flexibee.eu/c/demo/faktura-vydana?q=&filter[filterObdobi.datVyst]=filterPoslednich7Dni
Warning: This is not a standard documented API filter — its functionality may change or be removed without prior notice. We recommend using standard API filtering.