EVM developer utilities toolbox: checksum, keccak, selectors, units
One call that works out what an EVM value is and converts it every useful way: an address gets its EIP-55 checksum and bytes32 form; a signature its 4-byte selector and event topic; calldata is decoded (ERC-20, NFT, permit, EIP-3009); a bytes32 becomes uint256, address and units; a number converts between wei, gwei, ether (or any decimals) and hex; text gets keccak256. Local, no network. Use for building or debugging contracts and agents.
Inputs
| Name | Type | Description |
|---|---|---|
input (required) | string | An address, signature, calldata, hex value, number or text |
decimals | string | Token decimals for unit conversions (default 18) |
Request
Over HTTP, with a card key from /credits:
curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/pack/evm-toolbox?input=transfer(address%2Cuint256)"Or one of your 25 free calls, no key:
curl "https://agent-data-tools.revmesh2074.workers.dev/pack/evm-toolbox?input=transfer(address%2Cuint256)&trial=1"Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.
Example result
{
"pack": "evm-toolbox",
"input": "transfer(address,uint256)",
"kind": "signature",
"canonical": "transfer(address,uint256)",
"functionSelector": "0xa9059cbb",
"eventTopic": "0xa9059cbb2ab09eb219583f4a59a5d0623ade346d962bcd4e46b11da047c9049b"
}From an AI agent (MCP)
Add the MCP server to Claude, Cursor or any MCP client. This tool is pack_evm_toolbox, and the first 25 successful calls are free:
https://agent-data-tools.revmesh2074.workers.dev/mcp