Convener: Jim DeLaHunt (@jdlh@mstdn.ca)

Participants who chose to record their names here:

• Ryan Barrett (https://snarfed.org)

Notes

• Purpose: to list the globally-inclusive handles in use in the social web (especially Fediverse or Atmosphere)

• Example for ATproto:

% curl -s "https://plc.directory/export?count=2&after=80000000" | jq '.did,.operation.alsoKnownAs,.operation.handle,.createdAt,.seq'
"did:plc:3rssuurn3d3wbzpjpf7bmvng"
[
  "at://ekakisui.bsky.social"
]
null
"2026-01-16T15:04:51.674Z"
80000001
"did:plc:sg7xgbd4ga6ofrhpbdpj6n4a"
[
  "at://sheydex.bsky.social"
]
null
"2026-01-16T15:04:54.705Z"
80000002

• https://atproto.com/specs/handle

• https://www.microcosm.blue/ (Slingshot)

• Census of Fediverse handles? A: Difficult technically and difficult culturally.

• ActivityPub protocol has an “indexable” field. Opt-in, so low participation.

• No centralised registry. Would need to subscribe and data would be incomplete.

• FASPs are aggregation of streams. https://github.com/mastodon/fediverse_auxiliary_service_provider_specifications

• https://joinfediverse.wiki/Relays

• Q: Can I query the messages mentioning me, and look for those handles? A: Maybe by Mastdon proprietary API.

• https://observatory.cyber.harvard.edu/

• Join the SWICG (at W3C), talk about this there, they’d love it!