Fetch and lint a /.well-known/http-message-signatures-directory: JWK shape (OKP/Ed25519), self-signature presence, key freshness, and pinned-agent consistency. Per-step pass/fail report.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.01 USDC | 0x8AfB...0Bc6 |