API Composition
In plain terms
Aggregating data from multiple services into one response.
Going deeper
API composition queries several microservices and combines their results to fulfill a single client request, often via a gateway or BFF. It assembles data spread across services.
Under the hood
Simple but can be inefficient (multiple calls, joins in memory); CQRS read models are an alternative.
Examples
Microservice queries, API gateways, BFF, data aggregation, dashboards.
Think of it like...
Like a concierge gathering info from several departments to give you one complete answer.