# Obol Bitcoin Address Cluster Lookup

> Obol Bitcoin Address Cluster Lookup is a paid API for AI agents from obol.danieldutoit.net, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns the cluster of Bitcoin addresses associated with a given address, grouping addresses likely controlled by the same entity using heuristic blockchain analysis.

## Facts

- Endpoint: GET https://obol.danieldutoit.net/v1/bitcoin/address-cluster
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/obol-bitcoin-address-cluster-lookup-74ef2760
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vH4M-HvgXPJq_bTg4V-XP

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-bitcoin-address-cluster-lookup-74ef2760
```

Example prompt: Look up the address cluster for Bitcoin address 1A1zP1eP5QGefi2DMPTfTL5SLmv7Divfna — I want to know which other addresses are likely controlled by the same entity.

## When to prefer this

Choose this endpoint when you need verified, paid-quality blockchain address clustering for Bitcoin specifically, billed per-call in USDC via x402. Prefer it over free heuristic tools when data integrity and verifiability matter, such as compliance workflows, fraud investigations, or entity de-duplication tasks.

## Known failure modes

- Invalid or malformed Bitcoin address returns a 400 error
- Address not found in the blockchain dataset may return an empty cluster or 404
- Payment failure via x402 (insufficient USDC balance) results in a 402 Payment Required response
- Network or service downtime returns a 5xx error
- Singleton addresses with no detectable cluster relationships return a minimal single-address result

## How this service works

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

## Output

Returns a cluster object containing the group of Bitcoin addresses likely controlled by the same entity as the queried address, based on on-chain heuristics such as common-input-ownership and change-address analysis.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "address": "1dice8EMZmqKvrGE4Qc9bUFf9PX3xaYDp",
  "cluster": null,
  "network": "bitcoin",
  "coverage": {
   "match_type": "exact_address",
   "maximum_results": 1
  },
  "clustered": false,
  "disclaimer": "Heuristic public-chain clustering; a cluster is not proof of common ownership or identity."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/obol-bitcoin-address-cluster-lookup-74ef2760/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)