# 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).

Looks up a human-readable label for an EVM contract address

## Facts

- Endpoint: POST https://pennyrail.vercel.app/api/p/mini/evm.address-label--contract-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-e2e9b1ba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xtrfTFHzv_2L5eXbcITBZ

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-e2e9b1ba -d '<json body>'
```

Example prompt: What is the label or name associated with the EVM contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48?

## When to prefer this

Use this endpoint when you need to resolve a raw EVM contract address into a human-readable label or name, particularly for enriching transaction data, auditing counterparties, or displaying friendly names in UIs. Prefer this over manual ENS lookups or block explorer scraping when you need a programmatic, pay-per-call approach via the x402 protocol.

## Known failure modes

- Unknown or unlabeled address returns empty or null label
- Invalid EVM address format causes input validation error
- Address exists on-chain but has no known label in the dataset
- Network timeout or service unavailability returns 5xx error
- Payment failure or insufficient USDC balance blocks the request

## How this service works

Machine-readable settlement service

## Output

A human-readable label or name identifying the EVM contract address, such as the project name, token name, or protocol associated with that on-chain 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-e2e9b1ba/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)