Official guides for understanding, deploying and maintaining Tor onion services.
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Search engine for finding indexed Tor onion services, with abuse filtering and public documentation.
Tor Project documentation portal for onion-service applications, standards and operator tools.
Load-balancing system for resilient Tor onion services, documented by the Tor onion-services team.
Research study examining the structure and technical characteristics of dark-web content and services.
Research paper describing large-scale crawling and analysis methods for onion services.
Historical visualization and research record mapping a sample of linked Tor onion services.
Longitudinal study measuring unique Tor onion services while accounting for mirrors and topology bias.
Open-source utility for gathering public metadata about onion services during authorized research.
Tor measurement project collecting performance data for public relays, bridges and onion services.
Official service-status page for Tor Project websites, bridges, directories and network services.
Question-and-answer archive covering Tor configuration, relays, onion services and research.
Europol assessment of online organized crime, including criminal services and dark-web developments.
Public community forum discussing I2P software, services, development and network operations.
Study of whether website fingerprinting can distinguish and identify Tor onion-service traffic.
Research paper evaluating abuse observed through a controlled honeypot hosted as a Tor onion service.
Open-source scanner for auditing onion-service metadata and operational security.
Python package that queries several search engines to find indexed Tor onion pages.
Official community forum for Tor users, relay operators, developers and onion-service administrators.
Technical specifications for Tor protocols, directory formats and onion-service behavior.
Twisted-based Python library for controlling Tor and building onion-service applications.
Tor add-on that helps onion-service operators reduce guard-discovery and related attacks.