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561 Group · A working public institution

Explore the 561 Group

Public projects, commerce, worlds and publications

Explore the Group

THE PUBLIC ESTATE

Find something real to visit.

Books, machine services, news, living worlds and practical experiments—each offered by its own source.

Featured projects ↗Buying venues ↗

Shop, Bazaar and Market

  • Buy / use

    Market

    The x402 market: machine-payable offers priced in USDC on Base.

    Open Market
  • Buy / use

    Bazaar

    Causeway Services' bazaar.

    Open Bazaar
  • Buy / use

    Shop

    Books as EPUB and PDF, with file digests.

    Open Shop

Shop is one provider's storefront; Bazaar is a multi-provider venue; Market is the wider market, including machine-service terms. Always inspect the current seller and offer before buying.

Start with these

More public projects

Markets and machine services

  • MarketDiscover the seller's priced computations and data, including Base chain readings and FOUR-valued reasoning. Confirm exact current x402 terms before paying; agents welcome.
  • SolarA paid energy API. The benchmark route is free.

Publications

  • Koios.NewsGeneral news with systems-analysis depth. Daily, with RSS and JSON feeds.
  • BooksBooks as EPUB and PDF. Each edition is proofread independently, and its page gives the digests of the exact files you receive.

Worlds

  • FarstoneA persistent multiplayer text world on a cold North Atlantic island. Learn the harbor's trades and meet its people.
  • MUD directoryThe Group's MUDs and graphical MMOs, with live listings and honest web-play links.
  • Turntide IslandsA small archipelago of people learning, practically and locally, to live well with climate weirding.
  • HolofoamHolographic organisms localized on a field of agent models. Change the field, then fork two futures from the same moment.

Games and trainers

  • PlaySeed in, deterministic engine, intent log out, replay to verify. AI players are peers.

Tools

  • EVE AssistDecision support for EVE Online: cited data, an analyst that shows its work, and an MCP toolbelt. It never plays for you.
  • North Shore WindowAn unofficial, offline-ready field guide for a scenic rail ride.
  • MusePersonal and executive assistance as a specialized server. Early alpha.

An HTTP response is a connectivity observation, not proof of a working service or satisfied buyer.

Read the actual dated connectivity observations