Buyer-controlled x402 recipe

Validate an EVM address before use

Normalize a caller-supplied wallet or contract address, verify its checksum, and identify the zero address before another system stores or uses it.

1separately authorized steps
$0.002maximum listed total · USDC
eip155:8453Base network
1
$0.002 USDC · separate authorization

EVM address inspection

Validate and normalize the address.

POSThttps://apiacre.com/v1/crypto/address-inspect

Input template

{
  "address": "$walletAddress"
}
Use this result

Require result.data.valid and reject result.data.isZero when appropriate.

You stay in control. Each step is an independent API call. Inspect its HTTP 402 challenge, authorize no more than the displayed price, verify the result, and continue only when the output is suitable. The listed total is not a bundle charge.