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

# Metadata API

> Metadata is information that describes your data. You can issue GET queries to the Connect AI API to retrieve metadata about the data sources connected to your account. The API can return information about the following categories:

* [List Catalogs](/en/API/Catalogs)
* [List Columns](/en/API/Columns)
* [List Exported Keys](/en/API/Exported-Keys)
* [List Imported Keys](/en/API/Imported-Keys)
* [List Primary Keys](/en/API/Primary-Keys)
* [List Procedure Parameters](/en/API/Procedure-Parameters)
* [List Procedures](/en/API/Procedures)
* [List Schemas](/en/API/Schemas)
* [List Tables](/en/API/Tables)