Transaction Preflight
preflightRead-onlyIdempotent
Simulate an unsigned Base transaction and detect failed execution, dangerous approvals and destination risk signals. Paid tool: 0.00098 USDC per call on Base via x402 (exact scheme). An unpaid call returns the payment requirement and charges nothing.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| to | Yes | Transaction destination. | |
| data | No | Unsigned calldata. | |
| from | No | Optional sender used for simulation. | |
| chain | Yes | ||
| valueWei | No | Native ETH value in wei. |