Frequently asked questions

What is this?

A public DC hublist directory. It periodically verifies each listed hub and publishes the live list for DC clients.

How do clients use it?

Add /hublist.xml.bz2 (or /hublist.xml) to your client's hublist sources. A machine-readable /hublist.json and an /rss feed are also available.

How do I register a hub?

Send an HTTP GET to /register?address=<hub url>&name=<name>&description=<text> (adc:// adcs:// dchub:// nmdcs://). NMDC hub software may instead use classic hublist registration on port 2501. New hubs are pinger-verified and reviewed before listing.

Why is my hub not listed?

It must be reachable by our pinger and, for anti-hijack, its address should resolve to the registrant's IP. Hubs that fail repeatedly are marked offline and eventually dropped.

What does [KP] mean?

The hub presented a TLS certificate whose keyprint we pinned; the published adcs:// address carries ?kp=SHA256/... so clients can verify it.