Stax is Rocket Money for AI builders. Connect once and Stax tracks every SaaS & AI subscription your app runs on plan, cost, usage and renewals in one panel.A drop-in SDK meters real API usage straight from your code (no proxy), so you see live spend per provider as it happens. It even pulls your actual invoices from Gmail and flags idle or over-budget services before they bill you. Stop guessing what your stack costs see it.