# Obol Address Labels

> Obol Address Labels is a paid API for AI agents from obol.danieldutoit.net, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns verified labels for a blockchain address (e.g. exchange, contract, entity name) on Ethereum, Bitcoin, or Tron.

## Facts

- Endpoint: GET https://obol.danieldutoit.net/v1/address-labels
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/obol-address-labels-8babfe2f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KMzbUPqvM6FRxbTYvl7HH

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 obol-address-labels-8babfe2f
```

Example prompt: Can you look up the verified label for Ethereum address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — I want to know what entity or exchange it belongs to?

## When to prefer this

Choose this endpoint when you need verified, curated labels for blockchain addresses across Ethereum, Bitcoin, or Tron — particularly for compliance workflows, transaction screening, or enriching on-chain data with human-readable entity names. It is priced per-call in USDC via x402, making it suitable for targeted lookups rather than bulk enrichment of large address sets.

## Known failure modes

- Unknown address returns empty label or no-data response
- Invalid chain value rejected with validation error
- Malformed or non-existent address returns error
- Payment failure via x402 prevents data return
- Address exists on-chain but has no known label in Obol's dataset

## How this service works

Obol sells verified blockchain data over x402, settled in USDC on Base.

## Output

A JSON object containing verified label information for the queried address, such as entity name, category (e.g. exchange, contract, mixer), and any additional metadata associated with the address on the specified chain.

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/obol-address-labels-8babfe2f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from obol.danieldutoit.net](https://www.zero.xyz/host/obol.danieldutoit.net/llms.txt)