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Vextorium EVM Developer Utilities
x402
Vextorium EVM Developer Utilities is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).
Performs EVM developer operations: keccak256 hashing, function selector derivation from ABI signature, EIP-55 checksum address formatting, and wei/gwei/ether unit conversion.
Price / call$0.003
Success—
StatusUnknown
How this service works
EVM developer utilities: keccak256 hash, function selector from a signature, EIP-55 checksum address and wei/gwei/ether conversion.
Output
Returns a JSON object with fields: operacion (the operation performed), entrada (the input value), and resultado (the computed output — a hex hash, 4-byte selector hex string, checksummed address, or converted numeric string depending on the operation).
Example use cases
Derive Solidity function selector
“What's the 4-byte selector for the function signature balanceOf(address)? I need it for a low-level call in my smart contract.”
Convert ether to wei for transaction
“Convert 0.05 ether to wei — I need the exact number to pass as a transaction value.”
Checksum an Ethereum address
“Can you apply EIP-55 checksum formatting to this Ethereum address: 0xab5801a7d398351b8be11c439e05c5b3259aec9b?”
Technical details
Endpoint
POSThttps://api.vextorium.com/evm-utilidades-pago?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, stateless EVM developer computations — hashing, selector derivation, address checksumming, or unit conversion — without spinning up a local Web3 library. Ideal for agents building or validating smart contract interactions, encoding ABI calls, or normalizing Ethereum addresses on the fly.
Side effects
- Missing required fields (operacion or valor) returns an error response
- Invalid or malformed Ethereum address returns an error on checksum operation
- Unrecognized operation enum value returns a validation error
- Non-numeric input to convertir returns a parsing error
- Missing 'de' or 'a' unit fields when calling convertir returns an incomplete request error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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