x402 Payment Flow

1. Agent makes a request → server responds 402 Payment Required with a payment payload

2. Agent pays in USDC on Base via api.cdp.coinbase.com

3. Agent retries with the X-Payment header → receives structured data

Facilitator: api.cdp.coinbase.com Payment token: USDC on Base (chain ID 8453) Integration guide: https://github.com/rigoblock/agentic-operator/blob/main/AGENTS.md