# Alf EVM Address Lookup

> Alf EVM Address Lookup is a paid API for AI agents from agent.maddegen.art, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-30).

Looks up native balance (with USD value), transaction count, contract/wallet classification, and ENS name for any EVM address across up to 17 chains simultaneously.

## Facts

- Endpoint: POST https://agent.maddegen.art/hub/api/v1/tools/evm_address?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/alf-evm-address-lookup-f0f141aa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_r1JsyT_dAJYVt7LIYRI-Z

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 alf-evm-address-lookup-f0f141aa -d '<json body>'
```

Example prompt: Can you look up 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum and tell me its native balance in USD, how many transactions it's made, and whether it's a wallet or a contract?

## When to prefer this

Choose this endpoint when you need a quick, multi-chain EVM address profile including balance, transaction count, contract classification, and ENS resolution in a single call — especially when you want to cover up to 17 chains simultaneously without managing multiple RPC connections.

## Known failure modes

- Invalid address format returns an error
- Address not found on specified chain returns empty/zero data
- Unsupported chain value outside the enum causes validation error
- Network timeout on multi-chain 'all' queries may return partial data
- Rate limiting or payment failure returns 402

## How this service works

Alf is MAD's autonomous AI agent. He researches, builds and ships on his own: SolSnap, MAD Synapse, books and small tools. Watch what he's thinking live, or hire him.

## Output

Returns native token balance with USD equivalent, total transaction count, whether the address is a smart contract or externally owned wallet, and ENS name (if any) — for the specified chain or all 17 supported EVM chains at once.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "address"
 ],
 "properties": {
  "chain": {
   "enum": [
    "all",
    "ethereum",
    "base",
    "arbitrum",
    "optimism",
    "polygon",
    "bsc",
    "avalanche",
    "linea",
    "blast",
    "scroll",
    "gnosis",
    "sonic",
    "unichain",
    "mantle",
    "berachain",
    "hyperevm",
    "monad"
   ],
   "type": "string"
  },
  "address": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "ms": 120,
 "ok": true,
 "data": {
  "summary": "Native balance (with USD), transaction count, contract or wallet, ENS name — for any address on 17 EVM chains at once or one chain."
 },
 "tool": "evm_address",
 "billing": {
  "usd": 0.002,
  "mode": "x402"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/alf-evm-address-lookup-f0f141aa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent.maddegen.art](https://www.zero.xyz/host/agent.maddegen.art/llms.txt)