UPDATE - During the COVID-19 Pandemic, we've made direct integrations completely free.
Direct Integrations are charged by usage. The first 100 actions every month are free (or the first 1,200 if you are on an annual plan). After that, there is an additional charge of $10 USD per 1,000 actions. See the pricing page for more details.
You are only charged for successful direct integrations - not integrations that fail or are prevented with conditional logic.
You can see your usage and upcoming charges for the current billing period on the Billing page.