Execute multiple search queries across different indexes.

Without the federation parameter, results are returned separately per query (multi-search mode).

With the federation parameter, results are merged across indexes and sorted by relevance (federated search mode).

Multi-Search Mode

Returns separate result sets for each query, maintaining index boundaries. Use this when you need to:

• Display results grouped by entity type
• Apply different filters/sorts per index
• Maintain separate pagination per index

Federated Search Mode

Merges results across all queries into a single ranked list. Use this when you need:

• Unified search across multiple entity types
• Single result set sorted by relevance
• Combined pagination across all indexes