CRM API Search returns no data

CRM API Search returns no data

I'm attempting to get a list of active clients through an API call. This is done through a Node server with axios. The API call looks like this:

            method: 'GET',
            headers: await getAccessHeader(),
            params: {
                criteria: `(Status_inschrijving:equals:Ingeschreven)or(Beschikbaar_voor_bemiddeling:equals:Ja)`,
            }

The request is made successfully but returns no data although it absolutely should. Instead it's a 204 status. There are plenty of test accounts that should meet the criteria.
When testing with a function within CRM itself, it works fine.

zoho.crm.searchRecords("Accounts", "(Status_inschrijving:equals:Ingeschreven)or(Beschikbaar_voor_bemiddeling:equals:Ja)");

Why does the API not return any data?