# 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 2026-09-13).

Resolves a human-readable label for an EVM blockchain address

## Facts

- Endpoint: POST https://pennyrail.vercel.app/api/p/mini/evm.address-label--address-label
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pennyrail-evm-address-label-lookup-8ea6b8a4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_x15lC4Ja7csE698Cxjv6S

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-8ea6b8a4 -d '<json body>'
```

Example prompt: Can you look up the label or name associated with the EVM address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — I want to know what entity or account it belongs to.

## When to prefer this

Use this endpoint when you need to resolve a human-readable label for a specific EVM/Ethereum address and want a pay-per-call micropayment model via x402 rather than maintaining an API subscription. Prefer this over ENS-only resolvers when you need broader address labeling beyond ENS names.

## Known failure modes

- Address has no known label — returns empty or null label field
- Invalid or malformed EVM address input — returns validation error
- Address not indexed — service may return 404 or empty result
- Network or service unavailability — HTTP 5xx response
- Payment failure via x402 protocol — 402 response if payment not processed

## How this service works

Machine-readable settlement service

## Output

Returns a human-readable label or name associated with the given EVM address, potentially including entity name, tag, or classification metadata describing who or what controls that 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-8ea6b8a4/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)