x402 is a market where the buyer is a machine. it cannot be lured with ads.
It buys from a marketplace's ranked list, whichever merchant best suits its need.
Core problem:
- marketplaces rank merchants on volume & unique buyers. A new merchant has neither.
- new merchants enter a cold-start state: no volume without buyers, no buyers without volume.

my independent research on 1,212 x402 merchants and 24 interviews shows:
1. Most volume in a category sits with a few merchants. Top-3 share runs 42% to 91%.
2. In worst case, 3 of 34 take 91.2% of payments.
3. Better listings do not rank higher. Past sales decide 70-98% of a merchant's rank.
4. New merchants have no tools to improve their ranking & are invisible to agents.
My research also proposes fixes.

Why now:
100M+ x402 transactions have settled on Base since mid-2025
yet half are artificial and real merchants never enter or give up.
If not fixed, x402 marketplaces become monopolies without growth, or end before they take off