Build a signed webhook envelope + ready-to-send request for Stripe, GitHub, Shopify, Slack, Svix, or generic HMAC
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.02 USDC | 0x2bb7...ac6d |
| solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp | exact | 0.02 tokens | GX6SKV...UrUE |