# API Reference

fxnode exposes exactly three package entrypoints:

1. [`fxnode`](/reference/generated/fxnode/) — browser client, shared graph types, and composition authoring.
2. [`fxnode/headless`](/reference/generated/fxnode/headless/) — composition-bound decoding and command execution without browser resources.
3. [`fxnode/widgets/color-ramp`](/reference/generated/fxnode/widgets/color-ramp/) — immutable color-ramp model and operations.

The generated pages describe exact signatures. For intent, ordering, and ownership, return to [Learn](/learn/) or start with [your first node](/learn/tutorials/first-node). Integration guidance lives in [browser host](/learn/guides/browser-host), while [composition](/learn/concepts/composition) and [state and persistence](/learn/concepts/state-and-persistence) explain the two main data boundaries.