List available themes
Returns the theme catalog for POST /v1/render: every design preset with its slug (pass it in the theme field), category, a “use it when” tagline, and an isDefault flag for the base theme applied when theme is omitted or unknown. Theme fonts are bundled (hosted), so a theme renders identically without any network dependency; your own font selection (fontStack / googleFontsUrl(s) / typography) still overrides a theme font. Themes are identical on every plan. Cacheable via a version-keyed ETag.
Response
The theme catalog.
The public theme catalog: each design preset with its category, "use it when" tagline, and default flag. Theme fonts are bundled (hosted); your own font selection still overrides a theme. Themes are identical on every plan.