# Federated / Multi Search
You can send multiple search requests in a single HTTP request, using the Multi-Search feature. This is especially useful to avoid round-trip network latencies incurred otherwise if each of these requests are sent in separate HTTP requests.
You can also use this feature to do a federated search across multiple collections in a single HTTP request.
For eg: in an ecommerce products dataset, you can show results from both a "products" collection, and a "brands" collection to the user, by searching them in parallel with a
You can use any of the Search Parameters here for each individual search operation within a
In addition, you can use the following parameters with
|Max number of search requests that can be sent in a multi-search request. Eg:
You'd typically want to generate a scoped API key with this parameter embedded and use that API key to perform the search, so it's automatically applied and can't be changed at search time.
results array in a
multi_search response is guaranteed to be in the same order as the queries you send in the
searches array in your request.