# Welcome to X.509

This site presents technical information about digital certificates, their use cases, as well as related data formats and protocols. Whether you want to run your own PKI, or use one, you will find some useful information how to deal with it.

If you have feedback or want to contribute, please open an Issue or a Pull Request on GitHub.


---

# Agent Instructions: 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://www.x509.wiki/readme.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.