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propeller.rocks EVM Calldata Encoder
x402
propeller.rocks EVM Calldata Encoder is a paid API for AI agents from propeller.rocks, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Encodes a function call (given a signature or ABI plus arguments) into EVM-compatible calldata bytes
Price / call$0.001
Success—
StatusUnknown
How this service works
Encode a function call (signature or abi + args) into EVM calldata
Output
Returns ABI-encoded EVM calldata as a hex string representing the full function call, ready to be used as the data field in an Ethereum transaction or low-level contract call.
Example use cases
Example prompt
“Encode the EVM calldata for a call to transfer(address,uint256) with recipient 0xAbCd1234... and amount 1000000000000000000 — give me the hex calldata I can paste into a raw transaction.”
Technical details
Endpoint
GEThttps://propeller.rocks/encode/calldataWhen to prefer
Use this endpoint when you need to construct raw EVM calldata for a contract interaction and don't have a full Ethereum library (like ethers.js or web3.py) available in your agent environment. Ideal for lightweight agents that need to prepare transaction data for a smart contract call without spinning up a full SDK.
Side effects
- Invalid or malformed function signature returns an error
- Mismatched argument types vs. signature returns encoding error
- Missing required arguments causes a 400 bad request
- ABI JSON is malformed or missing the function definition
- Argument values that can't be coerced to the expected Solidity types fail with a type error
- Payment not provided or insufficient balance returns a 402 Payment Required
Tags
x402
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