I built a machine-payable crypto intelligence API. No API keys. No subscriptions. No billing dashboard. AI agents pay per request in USDC using HTTP 402. CoinOpAI How It Works Agent calls endpoint Server responds with HTTP 402 Payment Required x402 protocol handles payment in USDC on Base Request retries automatically Data returns The API becomes its own billing system. What's Inside 819 agentic workflow prompts — ready-to-run automations Kronos intelligence — hourly crypto signals, risk state, directional decisions, post-trade audits $0.05 USDC per call — fractions of a cent to a few cents Every decision gets a decision_id . Every decision can later be audited against real market data.…