> For the complete documentation index, see [llms.txt](https://docs.zipy.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zipy.ai/troubleshooting/no-network-timing-split-available.md).

# No network timing split available

Zipy uses the [Resource Timing API](https://developer.mozilla.org/en-US/docs/Web/API/Performance_API/Resource_timing) to retrieve information about the timing of various resources loaded by a web application. However, it is restricted by the cross-origin security policies enforced by browsers. By default, only resources loaded from the same origin as the web application are accessible for timing information.

To overcome this limitation, you can enable extended data collection for cross-origin resources subject to Cross-Origin Resource Sharing (CORS). This can be achieved by including the "Timing-Allow-Origin" HTTP response header in your cross-origin resources. For instance, you can grant access to resource timing for any origin by setting the header value to "Timing-Allow-Origin: \*". Additional details about CORS can be found in the [MDN Web Docs](https://developer.mozilla.org/en-US/docs/Web/API/Performance_API/Resource_timing#cross-origin_timing_information).


---

# 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.zipy.ai/troubleshooting/no-network-timing-split-available.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.