Most backend people still think monetizing an endpoint means Stripe + accounts + dashboards. Kill that. One middleware line. Agents pay. Humans can still browse free.
$0.001 floorBase eip155:8453X-PAYMENT-TXNo API key
We run live production x402 hosts on Base (mcp-x402, acp-x402, sml-rwa-api), publish OpenAPI, register on x402scan, and ship working receipts — not vapor decks.