Try it in the Playground first

Playground tab: choose "Sample data" and press "Get a test token" (15 minutes), or "Company's own key" and paste a live key to see real data read-only. Pick an endpoint, fill in values and press "Send request" to see the response, status, time and headers. You can try writes too (endpoints starting POST / PATCH) — on sample data only; the body is pre-filled with sample ids, edit the JSON, and set dry_run = true to see the result without saving. "Code" gives curl / JavaScript / Python to copy — without the key (keep it in an environment variable). The full API reference opens from "API documentation" at the top.