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EVM Address Validator & Contract Address Calculator
x402
EVM Address Validator & Contract Address Calculator is a paid API for AI agents from golf-evm-math.x402-evm-math.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-28).
Validates an Ethereum address, returns its EIP-55 checksum form, and optionally computes CREATE or CREATE2 derived contract addresses.
Price / call$0.001
Success—
StatusUnknown
How this service works
Exact EVM address, calldata, Uniswap V2/V3 and impermanent-loss math. Pay per call in USDC on Base via x402.
Output
Returns a JSON object with a 'valid' boolean indicating if the address is well-formed, a 'checksum' string containing the EIP-55 checksummed address, and optionally the derived contract address for CREATE or CREATE2 deployments.
Example use cases
Checksum wallet address before transfer
“I have this Ethereum address — 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae — can you validate it and give me the properly checksummed version so I can safely use it in my app?”
Predict CREATE2 contract deployment address
“What address will my contract be deployed to if the deployer is 0x6C9FC64A53c1b71FB3f9Af64d1ae3A4931a5f4E9, salt is 0xabcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890, and init code hash is 0x9a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b?”
Predict CREATE contract address from nonce
“If my deployer wallet is 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B and it's at nonce 5, what Ethereum address will the next deployed contract land on?”
Technical details
Endpoint
GEThttps://golf-evm-math.x402-evm-math.workers.dev/evm/address?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need deterministic, exact EVM address validation and EIP-55 checksumming without setting up a local Web3 library, or when you need to predict contract deployment addresses (CREATE/CREATE2) on-the-fly in an agent pipeline. Prefer this over general-purpose RPC calls when you want a simple pay-per-call REST API that handles the math server-side.
Side effects
- Invalid or malformed address input returns valid: false
- Missing required address query parameter returns an error
- Incomplete CREATE2 parameters (e.g. missing salt or init_code_hash) may return an error or fall back to simpler validation
- Payment not provided or insufficient USDC results in HTTP 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"checksum": "0x52908400098527886E0F7030069857D2E4169EE7"
}
}Tags
x402
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