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Preflight

Preflight any Base transaction before you sign it: simulates the call against latest state (success or decoded revert reason), estimates gas with a safe limit, and prices the full fee (L2 execution + L1 data upper bound) in ETH and USD, plus the ETH balance needed. 0.50 USDC via x402 on Base.

POST https://preflight.madebydevx.com/v1/preflight

0.5 USDC on Base · payTo 0xB3cDDccEe6B150c8efFD55B961afc0Ecefe7f247

Status: unverified (probe-pending)

Settlement: direct to the seller's payTo — 0% HIVE402 take

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