# Base USDC Transfer Evidence

Check Base mainnet USDC transfer receipts using a quorum of at least two of three public JSON-RPC providers.

Free demo: https://jzallxzbbdtelcpabfgr.supabase.co/functions/v1/agent-usdc-receipt/api/v1/demo
Paid GET: https://jzallxzbbdtelcpabfgr.supabase.co/functions/v1/agent-usdc-receipt/api/v1/receipt?tx=0x...&to=0x...&min_usdc=0.01&min_confirmations=12
Price: 0.01 USDC with x402 v2 on Base.
This service compares the receipt and USDC logs across three public RPC providers and requires 2 matching responses. It does not produce a cryptographic state proof. PayAPI Market confirmed one externally funded 0.01 USDC paid call, returning HTTP 200; see https://jzallxzbbdtelcpabfgr.supabase.co/functions/v1/agent-economy-paid-sale-proof/first-sale.json. This does not prove repeat buyer demand or production-grade security.