# HALOWERK kettenwerk Wallet Classifier

> HALOWERK kettenwerk Wallet Classifier is a paid API for AI agents from kette.netzhandwerker.de, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-14).

Classifies a blockchain wallet address across multiple EVM chains (Ethereum, Base, Arbitrum, Optimism) to identify its type and activity profile

## Facts

- Endpoint: POST https://kette.netzhandwerker.de/wallet/classify
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-kettenwerk-wallet-classifier-7ea5159c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pSfwBWsuZzh1EmB-0tIjj

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 halowerk-kettenwerk-wallet-classifier-7ea5159c -d '<json body>'
```

Example prompt: Can you classify the wallet 0x1234567890abcdef1234567890abcdef12345678 and tell me what type of account it is — check it on Ethereum, Base, and Arbitrum?

## When to prefer this

Choose this endpoint when you need to classify or profile a specific EVM wallet address across multiple chains simultaneously (Ethereum, Base, Arbitrum, Optimism) and want a lightweight, pay-per-call approach via x402 micropayments in USDC. Prefer this over general block explorers when you need structured classification data rather than raw transaction history.

## Known failure modes

- Invalid wallet address format (not 0x + 40 hex chars) — likely a 400 error
- Unsupported chain name passed in chains array
- Wallet has no on-chain activity — may return empty or unknown classification
- Payment failure via x402 protocol — endpoint returns 402 if USDC payment not completed
- Too many chains requested (max 4) — request rejected

## How this service works

HALOWERK kettenwerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.

## Output

Returns a classification of the queried wallet address, describing its type (e.g. EOA, smart contract, multisig) and activity characteristics across the specified EVM chains

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chains": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "maxItems": 4,
   "description": "Chains to query. Default: ethereum, base, arbitrum, optimism."
  },
  "wallet": {
   "type": "string",
   "description": "Wallet address, 0x followed by 40 hex characters."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-kettenwerk-wallet-classifier-7ea5159c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kette.netzhandwerker.de](https://www.zero.xyz/host/kette.netzhandwerker.de/llms.txt)