# Desktop Client {% hint style="info" %} **Good to know:** Before using Peeringhub's ACME Client to request for Stir/Shaken certificate, you must make sure that your OCN is whitelisted in Peeringhub's ACME server by completing the online subscription process. {% endhint %} ## ACME Client Download Instruction Peeringhub's subscribers can download ACME Client via the URL. Linux Centos version: > Windows version: > --- # 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://doc.peeringhub.io/guides/generating-certificate/desktop-client.md?ask= ``` 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.