Custom Nodes

Choose the right path for building, extending, and publishing ComfyUI custom nodes.

This section only covers how to develop custom nodes. If you are interested in how to use custom nodes, see Install Custom Nodes in the Get Started section.

Custom Nodes extend ComfyUI with new server-side behavior, user-interface features, and integrations. Choose a path based on what you are trying to do.

Build Custom Nodes

Learn the client-server model, node categories, Python backend, and JavaScript frontend before building your node.

Package & Publish

Prepare a node package, publish it to the Comfy Registry, and manage versions and releases.

Choose a starting point

• New to custom nodes: start with Custom Nodes Overview.
• Building the backend: see Python (Backend) · V3. New nodes should use the V3 schema; find the legacy V1 schema in the V1 section.
• Extending the UI: see JavaScript (UI).
• Publishing a package: start with the Registry Overview.