The getCatalogData query supports powerful filtering capabilities, allowing users to narrow down the list of catalog items. Within a Standard API, the system offers next predefined filters:
Filter NameFilter IDPurpose
Searchfilter_searchFilters catalog items by training title using a free-text query.
Durationfilter_durationFilters by training duration, based on duration terms already associated with catalog items.
Domainsfilter_domainFilters by training domains, based on domain terms already associated with catalog items.
Statusfilter_statusFilters by the user’s training attempt status, such as “Not started”, “In progress”, or “Passed”. Only applicable for authenticated users.
Within the Custom API, the list of filters is automatically extended with any client-defined custom fields. Please refer to the dedicated documentation for full implementation details. The list of available filters can be fetched using the getCatalogFilters query: 
query getCatalogFilters {
  getCatalogFilters {
    id
    label
    options {
      key
      value
      weight
    }
    formElementType
    filterFormSection
  }
}

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UI Rendering Guidelines

To ensure a consistent and intuitive user experience, follow these guidelines when rendering filters in the client platform:
FieldUsage
idThe filter ID. This must be passed back to the API exactly as received—do not modify or parse.
labelThe recommended filter label. This can be renamed or localized on the client platform as needed.
formElementTypeDetermines the UI control to render. Common values include CHECKBOXES and TEXTFIELD.
optionsA list of selectable options for the filter, if applicable. Most relevant for CHECKBOXES.
filterFormSectionOptional field that suggests a logical grouping or placement in the UI layout.

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Applying Filters

Filtering is configured using the filters argument in the getCatalogData query.
Filtering can be combined with sorting and pagination arguments to further refine the results.

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Filtering Arguments

ArgumentTypeDescription
filters[FilterInput]A list of filter objects specifying which fields and values to filter by.
Each FilterInput consists of:

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FilterInput Fields

FieldTypeDescription
keyIDThe filter field ID (e.g. "filter_duration"). Must match values from getCatalogFilters.
value[String]One or more values to apply for the specified filter:
• For CHECKBOXES, use the selected option keys.
• For TEXTFIELD, pass the raw input string as a single-element array.

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Example: Applying Multiple Filters

The following example applies two filters to the getCatalogData query: one for duration, selecting specific predefined options, and another for search, using a free-text input to match training by title. 
query {
 getCatalogData(
    first: 5,
    filters: [
      {
        key: "filter_duration",
        value: ["3", "4"]
      },
      {
        key: "filter_search",
        value: ["Anonymous"]
      }
    ]
  ) {
    edges {
      node {
        training {
          title
          duration { id, name }
        }
      }
    }
    totalItems
  }
}