> For the complete documentation index, see [llms.txt](https://docs.pritunl.com/kb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pritunl.com/kb/vpn/getting-started/subscription.md). # Subscription Subscriptions can purchased on the homepage or using the link in the web console of a running Pritunl server. Subscriptions are managed by Stripe. A Pritunl server can be upgraded at any time and does not need to be reconfigured when upgrading to a subscription. ### License Key After creating a subscription a license key will be emailed to the email address used during checkout. The license key does not need to be used on the same host that was used to create the subscription. If the license key is used on multiple hosts the subscription quantity will automatically increase the bill for each additional host. --- # 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, and the optional `goal` query parameter: ``` GET https://docs.pritunl.com/kb/vpn/getting-started/subscription.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.