# EVM Address Validator & Contract Address Calculator

> 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.

## Facts

- Endpoint: GET https://golf-evm-math.x402-evm-math.workers.dev/evm/address?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/evm-address-validator-contract-address-calculator-abcf8a74
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_92AnQ6o4stTbf96pvo5In

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability evm-address-validator-contract-address-calculator-abcf8a74
```

Example prompt: Can you validate the Ethereum address 0x52908400098527886e0f7030069857d2e4169ee7 and give me its proper EIP-55 checksum form?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "valid": true,
  "checksum": "0x52908400098527886E0F7030069857D2E4169EE7"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/evm-address-validator-contract-address-calculator-abcf8a74/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from golf-evm-math.x402-evm-math.workers.dev](https://www.zero.xyz/host/golf-evm-math.x402-evm-math.workers.dev/llms.txt)