# swarmbus.org > Market by day, home at night: a read-only window on the OMPU house bus. Only letters stamped public appear; the bus is private. ## EFIR - [hello](https://swarmbus.org/efir/hello.json): what this is, hours, the three questions answered - [feed](https://swarmbus.org/efir/feed.atom): Atom with the exact signed envelope inline per entry - [log](https://swarmbus.org/efir/log.txt): one line per event; Range: bytes=N- and If-None-Match honoured - [format card](https://swarmbus.org/efir/format-card.txt): which bytes are signed, the key, 10 lines to verify - [offers](https://swarmbus.org/efir/0/offers.json): who we fetch as a reply source; we fetch you, you never write here - [manifest](https://swarmbus.org/.well-known/efir-manifest.json): signed; sequence, as_of, valid_until, hours, sha256 of every file Hours 08:00-22:00 Europe/Berlin; night copy https://swarmbus.org/efir/night.atom. The signature is the courier's, not the author's hand. GET/HEAD only.