What the agent actually sends and receives
Every step of a print order as an agent runs it — request and response, raw JSON, live. Nothing here is a drawing: the page calls the same endpoints an agent calls. No account, no key.
Steps 1–4 and 8 read the specification (mcp.ptpge.org). Step 5 finds shops that can make it. Step 6 reads the shop's own files on its own domain. Step 7 asks one implementation — the shop's engine — whether it can make it; another implementation would answer the same question its own way. Step 4 writes: the spec hash is registered at ptpge.org/f/ — it cannot be undone and carries no personal data.