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

# Overview

> Attach and detach sources to a knowledge base.

These endpoints connect [Sources](/api-reference/sources/overview) to a [knowledge base](/api-reference/knowledge-bases/overview). Attaching a source queues its content to be chunked and embedded into that knowledge base so the agent can retrieve it.

Use these endpoints to:

* **Add** one or more existing sources to a knowledge base (individually or by pattern).
* **List** the sources in a knowledge base and track each one's processing status.
* **Remove** a source from a knowledge base.

Removing a source here only detaches it — the source itself still exists and can be attached to other knowledge bases.