{"endpoint": "demo_402", "version": "2.2", "protocol": "x402", "description": "x402 crypto payment protocol demo", "flow": ["1. Call any premium endpoint -> gets 402 response", "2. Send XRP to the wallet address", "3. Register at /api/v1/x402/register/", "4. Use X-API-Key header on all requests"], "wallet_address": "r4UHdyL4hp5UTiYMJYLq6M7N3gBswPro2G", "payment_instructions": "Use the Xumm app or any XRPL wallet. Send exact amount.", "xumm_deep_link": "https://xaman.app/detect/request:r4UHdyL4hp5UTiYMJYLq6M7N3gBswPro2G?amount=10", "recommended_next_action": "POST /api/v1/x402/register/ to get started"}