Optional agentAgent request context for observability (Nevermined extension)
Optional agentAgent request ID for observability tracking (Nevermined extension)
Optional invalidReason for invalidity (only present if isValid is false)
Whether the payment authorization is valid
Optional payerAddress of the payer's wallet
Optional urlURL pattern that matched the endpoint (Nevermined extension)
x402 Verify Response - per x402 facilitator spec
See
https://github.com/coinbase/x402/blob/main/specs/x402-specification-v2.md