> For the complete documentation index, see [llms.txt](https://docs.aios.foundation/aios-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aios.foundation/aios-docs/aios-agent-sdk/overview.md).

# Overview

The AIOS-Agent SDK (Cerebrum) provides a structured interface between user device applications and the AIOS kernel through different functional modules.

<figure><img src="/files/Li9HKVBDg9EV5UKdBVxf" alt="" width="563"><figcaption><p>How agents leverage Agent-SDK to interact with AIOS kernel</p></figcaption></figure>

All queries from these modules are ultimately channeled through a central `send_request(Query)` function in the AIOS-Agent SDK, which then communicates with the AIOS kernel via HTTP requests (either to localhost or a remote URL).

On the user device side, the agent contains code snippets for planning, action, memory, and storage that interact with their respective modules through the Cerebrum Client interface. This creates a clean separation between the application logic and the kernel communication layer. **Please make sure you have read about how to use and develop agents before going deep into these APIs.**&#x20;

The SDKs contain the following APIs:&#x20;

* [LLM Core API](/aios-docs/aios-agent-sdk/llm-core-api.md)
* [Memory API](/aios-docs/aios-agent-sdk/memory-api.md)
* [Storage API](/aios-docs/aios-agent-sdk/storage-api.md)
* [Tool API](/aios-docs/aios-agent-sdk/tool-api.md)