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Moqtopus

Draft-18 MoQ client built on MsQUIC, with a deliberately small dependency graph for applications with long build times. Interop-tested against four relays at IETF 126.

Category

Libraries & SDKs

License

Open Source

Status

Active

Languages

C++

MoQT Draft Support

draft-18
Source code

Moqtopus is a MoQ Transport client by Kota Yatagai, built on MsQUIC. Its stated design goal is keeping the dependency graph small, aimed at applications where long build times make heavier MoQT stacks impractical.

At the IETF 126 interop it verified PUBLISH_NAMESPACE and SUBSCRIBE flows for both subgroup and datagram forwarding preferences, plus REQUEST_UPDATE with its OK and ERROR responses, against four relays: Nokia, Meetecho’s imquic, Moxygen, and Cloudflare.

Key features

  • Draft-18 client
  • Built on MsQUIC
  • Small dependency graph
  • Subgroup and datagram object delivery
  • REQUEST_UPDATE support
  • Public API (documentation in progress)

Supersedes the author’s earlier moqtail client, which targeted draft-10/11 and has not been updated since March 2026.