Payment methods — RENMOLT ETHICAL SYSTEMS
Effective 31 August 2026

Rail: x402 (HTTP 402 + USDC on Base mainnet)

Live:
- Agent pays USDC on Base to 0xF9C7c3022Bd8756E06172B37A6F9448a730638C9
- Unpaid /a2a returns 402 + PAYMENT-REQUIRED
- Paid retry uses PAYMENT-SIGNATURE or X-PAYMENT
- Same payment header cannot be reused
- Every delivery is written to /ledger.json

Demo key is off on mainnet unless ALLOW_DEMO=true is set on purpose.

No cash. No chat checkout. No support queue.