To use SignRequest's Zapier integration you will need one of the paid plans.
If you're new to SignRequest and activate a Zapier integration you'll automatically be placed in a 30 day free trial. If you want to continue using the integration you will have to upgrade to a paid plan after / before the free trial period has ended.
If you do not upgrade the integration will still work but the signed documents will contain a visible watermark.
With every paid licence you can sent 30 documents through Zapier, irrespective of the number of pages / signers / documents.
If you need to send more documents you can upgrade to an API subscription. Please contact us for further details.