> For the complete documentation index, see [llms.txt](https://docs.medable.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.medable.com/releases/release-notes/cortex-api-2.21.2.md).

# Cortex API 2.21.2

**October 26, 2023** 

Cortex API 2.21.2 is a planned upgrade that has been deployed for all existing and upcoming studies. 

This upgrade contains updates to back-end services that do not impact the participant or site experience. All back-end services are tested and validated in accordance with our standard operating procedures before being deployed. There is no GxP risk. No additional testing, training, or documentation is needed for this upgrade.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.medable.com/releases/release-notes/cortex-api-2.21.2.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.