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Protocol and API documentation for Tor relay and bridge status data used by network tools.

Open-source interface and API project for searching indexed onion content.

Measurement study mapping the I2P anonymity network and analyzing its observable structure.

Independent dashboard analyzing Tor relay operators, concentration and network diversity.

Official Tor archive providing recent and historical network descriptors for reproducible research.

Tor network-health dashboard showing directory consensus, votes, signatures and relay measurements.

Official source repository for the Tor network daemon and core protocol implementation.

Public community forum discussing I2P software, services, development and network operations.

Network test that checks whether Tor access appears blocked and contributes measurement data.

Official page that tests whether the current connection appears to be using the Tor network.

Official service-status page for Tor Project websites, bridges, directories and network services.

Active public discussion archive for Tor relay and bridge operators, support questions and network issues.

Official Tor service distributing bridge relay addresses to users facing network blocking.

Historical lookup showing whether an IP address appeared as a Tor relay on a specified date.

Historical visualization and research record mapping a sample of linked Tor onion services.

Tor measurement project collecting performance data for public relays, bridges and onion services.

Public-health research measuring harmful-content availability and searches on the Tor network.

Official interface for exploring public Tor relay and bridge metadata from Onionoo.

Tor Project hub for technical reports, open research questions, datasets and research safety guidance.