Zapier is a service designed to connect different applications. Zapier acts as a bridge between the two services using their APIs. You can connect Leeloo.ai with another service, for example, Gmail, and send an email to the buyer when the offer is successfully paid. Follow the instructions for integrating the Leeloo.ai platform via Zapier:
Integration of Leeloo.ai with Gmail (sending a letter upon payment)
Integration of Leeloo.ai with GetResponse (creating a contact upon subscription)
enIntegration of Leeloo.ai with amoCRM via Zapier (creating a lead upon payment)
In order to successfully use Zapier, you need to register with it and use it like any other integrator service, sending API requests through it to the systems you need.