Integrations

FilterX auto-detects popular plugins and enables deep integrations. All integrations follow a common IntegrationInterface contract.

ACF

Advanced Custom Fields (ACF)

When ACF is active, FilterX registers acf:field as a facet source. You can use any ACF field as a filter source, including nested repeater notation.

Supported ACF Field Types

Text

Number

Select

Checkbox

Radio

Taxonomy

Relationship

Post Object

Repeater (sub-fields)

Flexible Content

# ACF facet examples

source: "acf:field", source_key: "brand"

source: "acf:field", source_key: "specs.material" // repeater.subfield

ACF field discovery endpoint: GET /wp-json/filterx/v1/fields/acf?post_type=product

Elementor

FilterX registers native Elementor widgets so you can add filter/grid combos directly in the Elementor page builder without shortcodes.

FilterX Grid

Full grid widget with configurable layouts, limits, and columns

FilterX Facets

Standalone facet widget — link to your grid visually by selecting it from a dropdown

💡 Use Case: Build your complete shop layout visually without writing a single line of code. Simply drag the Grid onto the page, drop the Facets widget into a sidebar column, and select which Grid it controls.

Gutenberg Blocks

FilterX registers Gutenberg blocks for use in the WordPress Block Editor with 100% Full Site Editing (FSE) support.

Blocks feature a full settings panel in the Gutenberg inspector sidebar, including a live real-time server-side preview of your actual grid and facets right inside the editor.

WPML

WPML & Polylang (Multilingual)

When WPML or Polylang is detected, FilterX scopes all index queries and REST responses to the current active language.

•Facet choices automatically show only values from the current language's posts
•Grid queries include a language filter so only posts in the active language are returned
•Facet names and labels are translateable via WPML or Polylang string translation
•REST API respects the lang query parameter: GET /wp-json/filterx/v1/facets?lang=fr

Note: Run a full re-index after activating WPML/Polylang to ensure the index contains language metadata.

⚡

Caching Plugins

FilterX is compatible with major caching plugins. REST API responses include ETags and Cache-Control headers. Dynamic filtering should be excluded from page caching.

WP Rocket

Exclude /wp-json/filterx/* from page cache rules

W3 Total Cache

Enable object caching; REST endpoints self-cache via ETags

LiteSpeed Cache

Exclude wp-json/filterx from ESI or page caching

Redis / Memcached

FilterX supports cache driver selection in Settings → Performance

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