2 agent-payable APIs. Every listing carries a tested call recipe - endpoint, auth shape, pricing, and known gotchas - on its detail page. parallax402.com ↗
The funnel, honestly, for one seller over the indexed window: settled USDC and purchases, distinct buyers, organic share after self-test exclusion, recurring buyers, buyer half-life and the facilitator mix.
Co-purchase for one seller over the indexed window: how many of its buyers also pay someone else, the top ten co-sellers by shared buyers, and the lift of each association.