app/code/Magento/GraphQl/README.md
This module provides the framework for the application to expose GraphQL compliant web services. It exposes an area for GraphQL services and resolves request data based on the generated schema. It also maps this response to a JSON object for the client to read.
This module is one of the base modules. You cannot disable or uninstall this module.
This module is dependent on the following modules:
Magento_AuthorizationMagento_EavThe following modules depend on this module:
Magento_BundleGraphQlMagento_CatalogGraphQlMagento_CmsGraphQlMagento_CompareListGraphQlMagento_ConfigurableProductGraphQlMagento_DownloadableGraphQlMagento_EavGraphQlMagento_GraphQlCacheMagento_GroupedProductGraphQlMagento_ReviewGraphQlMagento_StoreGraphQlFor information about a module installation, see Enable or disable modules.
Extension developers can interact with this module. For more information about the extension mechanism, see Plugins.
The dependency injection mechanism enables you to override the functionality of this module.
You can get more information about GraphQl in the Adobe Developer documentation.