RFC 9799 · PROPOSED STANDARD · 2025
SUN · 14 JUN 2026
Automated Certificate Management Environment Extensions for ".onion" Special-Use Domain Names
Overview
RFC 9799, “Automated Certificate Management Environment Extensions for ".onion" Special-Use Domain Names”, is a Proposed Standard document published in June 2025 by Q Misell. The canonical text is published by the RFC Editor.
Abstract
This document defines extensions to the Automated Certificate Management Environment (ACME) to allow for the automatic issuance of certificates to Tor Hidden Services (".onion" Special-Use Domain Names).
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 9799 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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