Execution

Transaction Builder

Encode and prepare any EVM transaction: ABI encoding, calldata construction, gas estimation, and nonce lookup for Ethereum, Base, Arbitrum, and Optimism.

post/x402/transaction-builder

Request

  • Base URL: https://coinrailz.com
  • URL: https://coinrailz.com/x402/transaction-builder
  • Auth: API key in header X-API-KEY

Request body

fromAddressstring required
toAddressstring required
chainstring required
valuestring

Value in wei

datastring

Transaction data (hex)

Response

Encoded transaction ready for signing

Changes

No recorded changes to this operation across all 1 revision of this API.