# PennyRail EVM Address Label Lookup

> PennyRail EVM Address Label Lookup is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Resolves a human-readable label or name for a given EVM blockchain address

## Facts

- Endpoint: POST https://pennyrail.vercel.app/api/p/mini/evm.address-label--evm-address-label
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pennyrail-evm-address-label-lookup-9f82871b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QXsAy10-nNi4PMkp-SmjI

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 pennyrail-evm-address-label-lookup-9f82871b -d '<json body>'
```

Example prompt: Can you look up the human-readable label for this EVM address: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045? I want to know what entity or wallet name is associated with it.

## When to prefer this

Use this endpoint when you need a quick, pay-per-call resolution of EVM address labels without managing your own address database. Ideal for enriching transaction records, analytics pipelines, or compliance workflows where occasional address lookups are needed and a flat $0.002 micropayment model fits better than a subscription. Prefer alternatives if you need bulk batch resolution or real-time ENS name resolution specifically.

## Known failure modes

- Address not found in label database — returns empty or null label
- Invalid EVM address format in input — may return error or empty result
- Unknown or newly created addresses with no label data — returns no label
- Network or service availability issues returning 402 or 5xx errors
- Payment failure due to insufficient USDC balance for the $0.002 per-call fee

## How this service works

Machine-readable settlement service

## Output

Returns a label or human-readable name associated with the given EVM address, potentially including entity name, tag, or category classification for the address.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pennyrail-evm-address-label-lookup-9f82871b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pennyrail.vercel.app](https://www.zero.xyz/host/pennyrail.vercel.app/llms.txt)