Base USDC Transfer Receipt Evidence
Read-only Base mainnet USDC transaction receipt evidence for autonomous agents. Checks a native USDC Transfer event, intended recipient, amount, transaction status and confirmations using agreement between two of three public Base RPC providers. Returns JSON evidence plus SHA-256 digest. Not a signed state proof, merchant certification, or spending authorization. Free demo: https://jzallxzbbdtelcpabfgr.supabase.co/functions/v1/agent-usdc-receipt/api/v1/demo . The paid GET route contains an unrelated public Base transaction example to make a real external verification deterministic.
x402 verified · $0.01 USDC/request · 1 endpoints / 1 tools · Verification · base network · x402 protocol
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpHow to call this API
Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.