Red Cup Engineering — page 2

Ordered by date created, newest first. Page 2 of 2; 16 publications total.

• One catalog, five machine faces: MCP, A2A, ActivityPub, llms.txt and x402 discovery 2026-10-13 · article
  One 130-offer catalog compiles into x402 discovery, an MCP server, an A2A agent card, an ActivityPub outbox and llms.txt so agents find the same prices.
• ActivityPub for a publication: a Fedify provider with WebFinger, NodeInfo, signed inboxes and no unsigned mode 2026-10-12 · article
  A Fedify-based ActivityPub provider for publications: WebFinger, NodeInfo 2.1, HTTP signatures, Data Integrity proofs and no unsigned inbox mode.
• Reading HTTP in four values: why a 402 is neither up nor down 2026-10-11 · article
  A status page that reads each HTTP answer as Belnap's true, false, both or neither: 2xx is true, 401/402/403 is both, no answer is false. With live data.
• Content-addressed names: RFC 6920 ni: URIs over canonical CBOR, with worked hashes 2026-09-23 · article
  How the 561 Group names data: an RFC 6920 ni: URI of the SHA-256 of NFC-normalized, deterministic CBOR, so key order and Unicode form never change an address.