Introduce API-only user for automations with Zapier, Make or others

Hello,
we are using Pipedriver together with Zapier for automations. Very often we create leads or contacts via Zapier. Zapier is connected via a private account of one of our co-workers.
After creation of leads/contacts we start a Pipedrive automation to send an email with some content. And here the problems start:
In Pipedrive there isn't any option to set an email sender. Instead the creator of the artifact (here: lead or contact) will be used. This leads to a workaround, that we need to duplicate Zapier's zaps again and again and again, if we need another email sender for such a Pipedrive automation.
My idea ist that we can setup a technical account. But in Pipedrive we need to pay as it is a full featured member. This kind of user needs no permission to use the frontend only via the API.
I would like to see that such users can be created without a fee and have only this restricted abilities.