# Ethereum Address Inspector

> Ethereum Address Inspector is a paid API for AI agents from automaton-tx-explainer.vercel.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-16).

Inspect any Ethereum address to determine its type (EOA, contract, or EIP-7702 delegated), ETH balance, nonce, proxy implementation details, and ERC-20 token metadata.

## Facts

- Endpoint: GET https://automaton-tx-explainer.vercel.app/v1/ethereum/address?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ethereum-address-inspector-324e57d0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MwakK83CCRYnFmnCWt6ZJ

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 ethereum-address-inspector-324e57d0
```

Example prompt: Can you inspect the Ethereum address 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 and tell me if it's a smart contract or a regular wallet, what its ETH balance is, and if it's a proxy contract, what the implementation address is?

## When to prefer this

Use this endpoint when you need a comprehensive single-call overview of any Ethereum address — combining type classification, balance, nonce, proxy detection, and ERC-20 metadata in one shot. Prefer it over block explorer manual lookups or multi-call RPC sequences when building agents that need to reason about unknown addresses on Ethereum mainnet specifically (not Base or BNB Smart Chain, which have sibling endpoints).

## Known failure modes

- Invalid address format (not matching 0x + 40 hex chars) returns a validation error
- Address not found or RPC node unavailable returns a connectivity/timeout error
- Non-ERC-20 contract at address returns empty token metadata fields
- Rate limiting or payment failure (x402) blocks the request

## How this service works

Inspect any Ethereum address: EOA vs contract vs EIP-7702 delegated, ETH balance, nonce, proxy implementation (EIP-1967/1167/zos), and ERC-20 name/symbol/decimals/supply.

## Output

Returns a structured object describing the address type (EOA, contract, or EIP-7702 delegated account), current ETH balance, nonce, proxy implementation address if applicable (detected via EIP-1967, EIP-1167 minimal proxy, or ZOS patterns), and if the address is an ERC-20 token contract: its name, symbol, decimals, and total supply.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$",
       "description": "Ethereum address (EOA or contract)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ethereum-address-inspector-324e57d0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from automaton-tx-explainer.vercel.app](https://www.zero.xyz/host/automaton-tx-explainer.vercel.app/llms.txt)