# EVM Address Type Classifier

> EVM Address Type Classifier is a paid API for AI agents from task-radar-x402.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Classifies an EVM address as EOA, contract, EIP-7702 delegated EOA, EIP-1167 minimal proxy, or EIP-1967 proxy, and returns code size, balance, and nonce

## Facts

- Endpoint: GET https://task-radar-x402.vercel.app/api/address-type?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/evm-address-type-classifier-a2b5f623
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_o0CcqWR0Qjp90HOO-Jl__

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-type-classifier-a2b5f623
```

Example prompt: Can you check whether 0x1234567890abcdef1234567890abcdef12345678 on Base is a regular wallet or a smart contract, and if it's a proxy tell me the implementation address?

## When to prefer this

Use this endpoint when you need to programmatically classify an EVM address before interacting with it — especially for security checks, proxy pattern detection, or distinguishing EOAs from contracts across multiple chains. It is superior to raw RPC calls because it bundles proxy pattern detection (EIP-1167, EIP-1967, EIP-7702) with basic account data in a single call, saving multiple RPC round-trips.

## Known failure modes

- Invalid or malformed address returns an error
- Unsupported chain value returns an error
- RPC node unavailability causes timeout or 500 error
- Address with no on-chain activity returns minimal data (zero balance, zero nonce, zero code size)
- Rate limiting or payment failure returns 402 or 429

## How this service works

Address type check: EOA vs contract, EIP-7702 delegated EOA, EIP-1167 minimal proxy, EIP-1967 proxy implementation/admin/beacon, code size, balance, nonce (public RPC). 0.01 USDC/call on Base.

## Output

Returns the address classification (EOA, contract, EIP-7702 delegated EOA, EIP-1167 minimal proxy, EIP-1967 proxy), proxy-related metadata (implementation address, admin address, beacon address), plus on-chain data including code size in bytes, native token balance, and nonce — all fetched live from public RPC.

## 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": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "chain": {
       "type": "string",
       "description": "ethereum|base|arbitrum|optimism|polygon|bsc (default ethereum)"
      },
      "address": {
       "type": "string",
       "description": "0x address"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/evm-address-type-classifier-a2b5f623/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from task-radar-x402.vercel.app](https://www.zero.xyz/host/task-radar-x402.vercel.app/llms.txt)