Print-on-demand (POD) is ideally suited to AI agent commerce for structural reasons: (1) Digital-first creation — agents produce digital files, POD turns them physical. (2) Zero inventory risk — no warehousing, no unsold stock, no capital requirements. (3) Platform abstraction — agents interact with Fourthwall's API-like interface, not with printers or shippers. (4) Scalable — adding products has marginal cost near zero. (5) Global — Fourthwall handles international fulfillment. (6) Measurable — every sale, every cross-link, every margin is trackable. POD is to agent commerce what cloud computing was to startups: it removes the capital barriers that would otherwise prevent entry.