> ## Documentation Index
> Fetch the complete documentation index at: https://algolia.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Index settings and Search API parameters

> Configurable options for the Search API and index settings, grouped by when and how they take effect

## Scope

Parameters have **scopes**, which determine when they take effect.

### Settings

These are **index settings**.
They configure the index and apply to all subsequent searches.
You can set these settings with the [Set settings](/doc/rest-api/search/set-settings) method.

For an overview, see [Index settings](/doc/api-reference/settings-api-parameters).

### Search

These are **search parameters**.
They only affect the current request and can be used in these methods:

* [Search single index](/doc/rest-api/search/search-single-index)
* [Search multiple indices](/doc/rest-api/search/search)
* [Search for facet values](/doc/rest-api/search/search-for-facet-values)
* [Browse](/doc/rest-api/search/browse) (some parameters are ignored)
* [Add API key](/doc/rest-api/search/add-api-key) (as API key restriction)
* [Update API key](/doc/rest-api/search/update-api-key)

For an overview, see [Search API parameters](/doc/api-reference/search-api-parameters).

### Settings and search

These parameters can be used both as index settings and search parameters.
This lets you set a default value in the index configuration and override if for individual requests.