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Developer Docs

Smart Add-Ons developer docs

Smart Add-Ons developer docs cover PHP hooks, REST API endpoints, custom field types, and template overrides — built for agencies and plugin developers.

What you can extend

Smart Add-Ons ships with a documented extension surface. Use it to register custom field types, change which groups appear on a product, override storefront templates, or integrate with headless / external systems via REST.

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Hooks & Filters

Action and filter reference for registering field types, modifying groups, customizing HTML, and more.

Open hooks reference →

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REST API

28+ endpoints under saue/v1 — addon groups, price preview, uploads, A/B tests, AI, and licensing.

Open API reference →

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Custom field types

Implement FieldTypeInterface and register with saue_register_field_types. Covered in the hooks guide.

See FieldTypeInterface →

Quick start for developers

  1. Confirm Smart Add-Ons is active and licensed on a staging site.
  2. Add a small mu-plugin or theme functions.php snippet using saue_register_field_types or saue_addon_groups_for_product.
  3. For REST calls, authenticate with an Application Password for a user that has manage_woocommerce.
  4. Public storefront endpoints (/price-preview, /addons/product/{id}) need no auth.

Namespaces & conventions

  • PHP hooks are prefixed with saue_.
  • REST namespace: /wp-json/saue/v1.
  • Text domain: saue.
  • Template override filter: saue_locate_template.
Next: Hooks & Filters →
← File Uploads