Hi @sarah.london
Each Zap app has a profile page that lists the available triggers/actions.
For example, Stripe: https://zapier.com/apps/stripe/integrations#triggers-and-actions
The Stripe Zap app integration does not currently support initiating payments.
Generally only the most common/popular app endpoints are made available via Zap app integrations.
Often, app APIs can be used to extend the functionality of integrations/automations.
In Zaps, this can be done with the Code app or Webhooks app.
Code: https://zapier.com/apps/code/help
Webhooks: https://zapier.com/apps/webhook/integrations
BrushFire doesn’t have a public Zap app integration, but does have a private BETA app: https://get.brushfire.help/hc/en-us/articles/115000080184-Zapier-Integration
Please Note: The Brushfire Zaps are currently in an invite-only private beta.
To make Zaps using Brushfire use this link: https://zapier.com/developer/invite/97826/2823a3c31396de69139693f0bd79b950/
Consider hiring a Zapier Expert for help on your project: https://zapier.com/experts