Cited Sterling 2006 FIB-4 fibrosis index. Agents must not invent FIB-4 from model memory; pay per request with x402 USDC on Base. Deterministic published index with citation. Not a treatment recommendation.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.005000 USDC | 0x836B...9Ee2 |